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Sample records for lysiphlebus delhiensis subba

  1. Yellapragada SubbaRow

    Indian Academy of Sciences (India)

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    filariasis, needs to use tetracycline antibiotics against plague and bacterial ... mouth existence. Deeply affected by poverty at home, SubbaRow .... which forced him to stay on deck during the journey. He was the ..... pregnant women of.

  2. Prof. Bookinkere Channakeshavaiah Subba Rao

    Indian Academy of Sciences (India)

    Annual Meetings · Mid Year Meetings · Discussion Meetings · Public Lectures · Lecture Workshops · Refresher Courses · Symposia · Live Streaming. Home; Fellowship. Fellow Profile. Elected: 1975 Section: Chemistry. Subba Rao, Prof. Bookinkere Channakeshavaiah Ph.D. (Purdue). Date of birth: 8 December 1923

  3. Interference of field evidence, morphology, and DNA analyses of three related Lysiphlebus aphid parasitoids (Hymenoptera: Braconidae. Aphidiinae)

    Czech Academy of Sciences Publication Activity Database

    Starý, Petr; Kavallieratos, N. G.; Petrović, A.; Žikić, V.; Rakhshani, E.; Tomanović, S.; Tomanović, Ž.; Havelka, Jan

    2014-01-01

    Roč. 14, č. 1 (2014), article number 171 ISSN 1536-2442 Grant - others:Ministry of Education, Science, and Technological Development of the Republic of Serbia(RS) 173006 Institutional support: RVO:60077344 Keywords : Aphis fabae * Impatiens glandulifera * Lysiphlebus Subject RIV: EG - Zoology Impact factor: 1.025, year: 2014 http://jinsectscience.oxfordjournals.org/content/14/1/171

  4. Olfactory mediated interactions between Citrus aurantium Toxoptera citricida and Lysiphlebus testaceipes Interação olfativa entre Citrus aurantium Toxoptera citricida e Lysiphlebus testaceipes

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    Reetu Bahadoorsingh

    2006-11-01

    Full Text Available The objective of this study was to establish whether there are olfactory interactions in the Lysiphlebus testaceipes Toxoptera citricida and Citrus aurantium tritrophic system. The response of male and female L. testaceipes to different odour sources of the host plant C. aurantium, the aphid host T. citricida and aphid-plant complex were investigated using a Y-tube olfactometer. Laboratory experiments were conducted by exposing individually aged male and female L. testaceipes to eight different odour treatments. Response of the parasitoids was taken after 15 min exposure to the volatiles from the different odour sources and based on their orientation to the particular chamber. Seventy percent of both male and female L. testaceipes showed high attractivity to aphid infested leaves. There was no significant difference based on age and sex of the parasitoid on their choice of odour. The organic compounds released by these combinations acted as semiochemicals in the tritrophic interactions and it is suggested that insect feeding induced attraction of the parasitoid L. testaceipes.O objetivo deste estudo foi investigar se existe interação olfativa no sistema tritrófico entre Lysiphlebus testaceipes Toxoptera citricida e Citrus aurantium. A resposta de machos e fêmeas de L. testaceipes a diferentes fontes de odor da planta hospedeira C. aurantium, o afideo parasita T. citricida e o complexo afideo-planta foram investigados com um olfatômetro do tipo tubo em Y. Os experimentos de laboratório foram conduzidos, expondo-se machos e fêmeas de L. testaceipes de diferentes idades, individualmente, a oito tratamentos com diferentes fontes de odor. A resposta do parasitóide foi tomada depois de 15 minutos de exposição aos voláteis de diferentes fontes de odor, baseando-se na orientação dos parasitóides a uma câmara particular. Setenta por cento de L. testaceipes machos e fêmeas, exibiram maior atração ao odor das folhas infestadas pelo af

  5. Geographic structure with no evidence for host- associated lineages in European populations of Lysiphlebus testaceipes, an introduced biological control agent

    Czech Academy of Sciences Publication Activity Database

    Mitrović, M.; Petrović, A.; Kavallieratos, N. G.; Starý, Petr; Petrović-Obradović, O.; Tomanović, Ž.; Vorburger, C.

    2013-01-01

    Roč. 66, č. 3 (2013), s. 150-158 ISSN 1049-9644 Grant - others:Swiss National Science Foundation(CH) IZ73Z0_128174; Ministry of Education and Science of the Republic of Serbia(RS) III43001 Institutional research plan: CEZ:AV0Z50070508 Keywords : Lysiphlebus testaceipes * Microsatellite * cytochrome oxidase I Subject RIV: EH - Ecology, Behaviour Impact factor: 1.873, year: 2013 http://www.sciencedirect.com/science/article/pii/S1049964413001084#

  6. The first finding of Cylindrospermopsis raciborskii (Woloszińska Seenayya et Subba Raju, 1972 (Cyanoprokaryota in Serbia

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    Cvijan M.

    2011-01-01

    Full Text Available Within the framework of a detailed survey of the algal community in the salt marshes of the Vojvodina Province (northern Serbia, we found Cylindrospermopsis raciborskii (Woloszińska Seenayya et Subba Raju in water samples from Slatina Pond near Opovo. This is, de facto, the first finding of C. raciborskii in Serbia. It is of particular importance given that C. raciborskii produces cyanotoxins and that available data show that in Serbia this alga is expanding its range of distribution, notably in carp ponds. The present paper is concerned with both the general and specific characteristics of the alga and the specific characteristics of the habitat in which the alga was found.

  7. A new species of Lysiphlebus Förster 1862 (Hymenoptera: Braconidae, Aphidiinae) attacking soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae) from China

    Czech Academy of Sciences Publication Activity Database

    Starý, Petr; Rakhshani, E.; Tomanović, Ž.; Hoelmer, K.; Kavallieratos, N. G.; Yu, J.; Wang, M.; Heimpel, G. E.

    2010-01-01

    Roč. 19, č. 1 (2010), s. 179-186 ISSN 1070-9428 Grant - others:Ministry of Science and Technological Developments of the Republic of Serbia(SR) 143006B Institutional research plan: CEZ:AV0Z50070508 Keywords : Lysiphlebus orientalis sp. n. * aphid parasitoids * Glycine max Subject RIV: EG - Zoology Impact factor: 0.500, year: 2010

  8. Tritrophic associations and taxonomic notes on Lysiphlebus fabarum (Marshall (Hymenoptera: Braconidae: Aphidiinae, a keystone aphid parasitoid in Iran

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    Rakhshani Ehsan

    2013-01-01

    Full Text Available An investigation of host associations, distribution and types of reproduction (sexual, asexual of Lysiphlebus fabarum (Marshall across 20 provinces of Iran during 2006-2011 was undertaken. The parasitoid was reared from three groups of host aphids belonging to genera Aphis and Brachycaudus, and occasional host aphid genera. Aphis craccivora Koch was the most frequent host aphid for L. fabarum on various host plants, including economically important crops. The field sex ratio generally favored females, but in some cases, only thelytokous (uniparental populations were found. In those cases, the host was always an Aphis species. Specimens reared from Brachycaudus aphids were all biparental, indicating the presence of a sibling biological species. Overall analysis of diagnostic morphological characters in the forewing indicated intra-specific variability in forewing marginal setae as well as variations in length of the R1 vein. [Projekat Ministarstva nauke Republike Srbije, br. 43001

  9. Fertility life table of Lysiphlebus testaceipes (Cresson) (Hymenoptera, Braconidae, Aphidiinae) in Rhopalosiphum maidis (Fitch) and Aphis gossypii Glover (Hemiptera, Aphididae)

    International Nuclear Information System (INIS)

    Silva, Robson Jose da; Bueno, Vanda Helena Paes; Silva, Diego Bastos; Sampaio, Marcus Vinicius

    2008-01-01

    Fertility life table of Lysiphlebus testaceipes (Cresson) (Hymenoptera, Braconidae, Aphidiinae) in Rhopalosiphum maidis (Fitch) and Aphis gossypii Glover (Hemiptera, Aphididae). The evaluation of the growth potential of Lysiphlebus testaceipes (Cresson) is important for its use in biological control programs of aphids. This work aimed to evaluate the fertility life table of L. testaceipes in Rhopalosiphum maidis (Fitch) and Aphis gossypii Glover. To determine the immature mortality, development and the sex ratio of the parasitoid, 12 females parasitoid, and 480 nymphs of each aphids were used. To evaluate the longevity and fertility 15 female parasitoid were used. Nymphs of each aphid (3 day old) were offered for each parasitoid female daily, until the female died, being 300 (first day); 250 (second day); 200 (third day); 150 (fourth day) and 50 nymphs in the other days. L. testaceipes showed immature mortality rates of 5.6 % in R. maidis and 9.2 % in A. gossypii. The development time of L. testaceipes in R. maidis and A. gossypii was 10.2 and 10.1 days, and the sex ratio of 0.71 and 0.66, respectively. The female of L. testaceipes had a fecundity of 498.8 eggs in R. maidis and 327.8 eggs in A. gossypii. The growth parameters the L. testaceipes in R. maidis and A. gossypii were, respectively R o = 205.38 and 164.08 females; r m = 0.449 and 0.431 females/females/day; λ= 1.57 and 1.54 females/day; T= 11.86 and 11.83 days and TD= 10.78 and 11.27 days. L. testaceipes showed great growth potential on both aphid hosts. R. maidis could be a suitable host for proposals of mass-rearing and open rearing system using L. testaceipes. (author)

  10. Genetic and morphological variation in sexual and asexual parasitoids of the genus Lysiphlebus - an apparent link between wing shape and reproductive mode

    Czech Academy of Sciences Publication Activity Database

    Petrović, A.; Mitrović, M.; Ivanović, A.; Žikić, V.; Kavallieratos, N. G.; Starý, Petr; Mitrovski Bogdanović, A.; Tomanović, Ž.; Vorburger, C.

    2015-01-01

    Roč. 15, article number 5 (2015) ISSN 1471-2148 Grant - others:Swiss National Science Foundation(CH) IZ73Z0_128174; The Ministry of Education, Science and Technological Development of the Republic of Serbia(RS) III43001 Institutional support: RVO:60077344 Keywords : Lysiphlebus Subject RIV: EG - Zoology Impact factor: 3.406, year: 2015 http://www.biomedcentral.com/content/pdf/s12862-015-0293-5.pdf

  11. Quality of different aphids as hosts of the parasitoid Lysiphlebus testaceipes (Cresson) (Hymenoptera: Braconidae, Aphidiinae); Qualidade de diferentes especies de pulgoes como hospedeiros do parasitoide Lysiphlebus testaceipes (Cresson) (Hymenoptera: Braconidae, Aphidiinae)

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Robson J.; Bueno, Vanda H.P. [Universidade Federal de Lavras, MG (Brazil). Dept. de Entomologia]. E-mail: vhpbueno@ufla.br; Sampaio, Marcus V.[Universidade Federal de Uberlandia (UFU), MG (Brazil). Inst. de Ciencias Agrarias]. E-mail: mvsampaio@iciag.ufu.br

    2008-03-15

    Lysiphlebus testaceipes (Cresson) has a broad aphid host range; however the quality of these preys may interfere in its biological feature. This study aimed to evaluate the quality of three Macrosiphini, Brevicoryne brassicae (L.), Lipaphis erysimi (Kaltenbach) and Myzus persicae (Sulzer), and three Aphidini Schizaphis graminum (Rondani) Rhopalosiphum maidis (Fitch) and Aphis gossypii Glover as hosts to L. testaceipes and to determine the relation possible of host preference, of size and quality of the host. The tests were carried out in climatic chamber at 25 {+-} 1 deg C, RH 70 {+-} 10% and 12h photophase. The parasitoid did not oviposite in B. brassicae and L. erysimi, while the other species were nutritionally suitable to the parasitoid. L. testaceipes showed preference for aphids from tribe Aphidini and these hosts presented better quality to the parasitoid when compared to Macrosiphini. Interactions among size, preference and quality between the Aphidini were found. L. testaceipes showed preference (parasitism rate 76.7%) for R. maidis, the bigger host (hind tibia with 0.281 mm). This host provided bigger size (hind tibia with 0.49 mm) and higher emergence rate (95.6%) to the parasitoid when compared to A. gossypii (parasitism rate of 55.7%). Also the smaller host A. gossypii (0.266 mm) provided smaller size hind tibia (0.45 mm) and higher mortality of the parasitoid (emergence rate 72.1%). However, the development time was shorter and the longevity was higher in A. gossypii (6.3 and 5.4 days, respectively) when compared to the host R. maidis (6.7 and 3.8 days, respectively), and not been related to host size. (author)

  12. Fertility life table of Lysiphlebus testaceipes (Cresson) (Hymenoptera, Braconidae, Aphidiinae) in Rhopalosiphum maidis (Fitch) and Aphis gossypii Glover (Hemiptera, Aphididae); Tabela de vida de fertilidade de Lysiphlebus testaceipes (Cresson) (Hymenoptera, Braconidae, Aphidiinae) em Rhopalosiphum maidis (Fitch) e Aphis gossypii Glover (Hemiptera, Aphididae)

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Robson Jose da; Bueno, Vanda Helena Paes; Silva, Diego Bastos [Universidade Federal de Lavras (UFLA), MG (Brazil). Dept. de Entomologia. Lab. de Controle Biologico], e-mail: ecosbio@yahoo.com.br, e-mail: vhpbueno@ufla.br; Sampaio, Marcus Vinicius [Universidade Federal de Uberlandia, Umuarama, MG (Brazil). Inst. de Ciencias Agrarias], e-mail: mvsampaio@iciag.ufu.br

    2008-07-01

    Fertility life table of Lysiphlebus testaceipes (Cresson) (Hymenoptera, Braconidae, Aphidiinae) in Rhopalosiphum maidis (Fitch) and Aphis gossypii Glover (Hemiptera, Aphididae). The evaluation of the growth potential of Lysiphlebus testaceipes (Cresson) is important for its use in biological control programs of aphids. This work aimed to evaluate the fertility life table of L. testaceipes in Rhopalosiphum maidis (Fitch) and Aphis gossypii Glover. To determine the immature mortality, development and the sex ratio of the parasitoid, 12 females parasitoid, and 480 nymphs of each aphids were used. To evaluate the longevity and fertility 15 female parasitoid were used. Nymphs of each aphid (3 day old) were offered for each parasitoid female daily, until the female died, being 300 (first day); 250 (second day); 200 (third day); 150 (fourth day) and 50 nymphs in the other days. L. testaceipes showed immature mortality rates of 5.6 % in R. maidis and 9.2 % in A. gossypii. The development time of L. testaceipes in R. maidis and A. gossypii was 10.2 and 10.1 days, and the sex ratio of 0.71 and 0.66, respectively. The female of L. testaceipes had a fecundity of 498.8 eggs in R. maidis and 327.8 eggs in A. gossypii. The growth parameters the L. testaceipes in R. maidis and A. gossypii were, respectively R{sub o}= 205.38 and 164.08 females; r{sub m}= 0.449 and 0.431 females/females/day; {lambda}= 1.57 and 1.54 females/day; T= 11.86 and 11.83 days and TD= 10.78 and 11.27 days. L. testaceipes showed great growth potential on both aphid hosts. R. maidis could be a suitable host for proposals of mass-rearing and open rearing system using L. testaceipes. (author)

  13. The Effects of Constant and Fluctuating Thermal Regimes for Reducing Chill Injuries During Cold Storage of Late-Instar Larva of Lysiphlebus fabarum (Hym., Braconidae

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    Hossein Mahi

    2016-09-01

    Full Text Available Introduction: Mass production of natural enemies has been considered a necessity for biological control programs. Most beneficial insects have a relatively short shelf-life, so suppliers do not have a sufficient number of biocontrol agents. The development of storage techniques for biocontrol agents provides flexibility and efficiency in mass production. Cold storage by prolonging insect development times provides a steady and sufficient supply of insects and synchronizes a desired developmental stage of biocontrol agents with times of pest outbreaks; so it reduces the cost of biocontrol programs by enlarging the production period over several months. Cold storage is usually associated with major fitness costs. Even if the insects remain alive after cold storage, a reduction of fitness may be observed, so the production of high quality natural enemies must be ensured. Developing effective methods is necessary in mass-producing. It has been reported that using fluctuating thermal regimes (FTR (i.e. cold exposure interrupted by periodic short pulses of high temperature versus constant thermal regimes (CTR can progress the quality of biological control agents and significantly reduce rates of mortality. In this study, the impact of fluctuating thermal regimes versus constant low temperatures on the emergence rate, sex ratio, post-storage development time, adult size, egg load and egg size of the parasitoid wasp, Lysiphlebus fabarum (Marshall was studied. The test was examined in three cold storage periods (1, 2, or 3 weeks. Lysiphlebus fabarum is an aphidiine parasitoid which attacks more than 70 species of aphids. Although both sexual (arrhenotokous and asexual (thelytokous populations of L. fabarum have been reported in Iran, the former population has been studied in this research. Materials and Methods: A stock colony of black bean aphid, Aphis fabae Scopoli (Hemi., Aphididae was established from material collected in bean fields in Khuzestan

  14. Tabela de vida de fertilidade de Lysiphlebus testaceipes (Cresson (Hymenoptera, Braconidae, Aphidiinae em Rhopalosiphum maidis (Fitch e Aphis gossypii Glover (Hemiptera, Aphididae Fertility life table of Lysiphlebus testaceipes (Cresson (Hymenoptera, Braconidae, Aphidiinae in Rhopalosiphum maidis (Fitch and Aphis gossypii Glover (Hemiptera, Aphididae

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    Robson José da Silva

    2008-01-01

    Full Text Available Avaliar o potencial de crescimento de Lysiphlebus testaceipes (Cresson é importante para seu uso em programas de controle biológico de pulgões. Este trabalho teve como objetivo determinar a tabela de vida de fertilidade de L. testaceipes em Rhopalosiphum maidis (Fitch e Aphis gossypii Glover. Na avaliação da mortalidade de imaturos, do desenvolvimento e da razão sexual foram utilizadas 12 fêmeas do parasitóide e 480 ninfas de cada pulgão testado. Na avaliação da longevidade e da fertilidade foram utilizadas 15 fêmeas do parasitóide e uma colônia por dia de cada pulgão, até a morte da fêmea do parasitóide, sendo 300 (1º dia; 250 (2º dia; 200 (3º dia; 150 (4º dia; 100 (5º dia e 50 ninfas nos demais dias. L. testaceipes apresentou taxas de mortalidade de imaturos de 5,6% em R. maidis e de 9,2% em A. gossypii, desenvolvimento de 10,2 e 10,1 dias e razão sexual de 0,71 e 0,66, respectivamente. L. testaceipes apresentou fecundidade de 498,2 ovos em R. maidis e de 327,8 ovos em A. gossypii. Os parâmetros de crescimento de L. testaceipes em R. maidis e A. gossypii foram, respectivamente, R O= 205,38 e 164,08 fêmeas; r m= 0,449 e 0,431 fêmeas/fêmeas/dia; lambda = 1,57 e 1,54 fêmeas/dia; T= 11,86 e 11,83 dias e TD= 10,78 e 11,27 dias. L. testaceipes apresenta alto potencial de crescimento em R. maidis e A. gossypii. R. maidis mostrou ser hospedeiro adequado aos propósitos de criação massal e utilização em sistema de criação aberta para L. testaceipes.The evaluation of the growth potential of Lysiphlebus testaceipes (Cresson is important for its use in biological control programs of aphids. This work aimed to evaluate the fertility life table of L. testaceipes in Rhopalosiphum maidis (Fitch and Aphis gossypii Glover. To determine the immature mortality, development and the sex ratio of the parasitoid, 12 females parasitoid, and 480 nymphs of each aphids were used. To evaluate the longevity and fertility 15 female

  15. Lysiphlebus orientalis (Hymenoptera, Braconidae), a new invasive aphid parasitoid in Europe – evidence from molecular markers

    Czech Academy of Sciences Publication Activity Database

    Petrović, A.; Mitrović, M.; Starý, Petr; Petrović-Obradović, O.; Žikić, V.; Tomanović, Ž.; Vorburger, C.

    2013-01-01

    Roč. 103, č. 4 (2013), s. 451-457 ISSN 0007-4853 Grant - others:Swiss National Science Foundation(CH) IZ73Z0_1_28174; Ministry of Education and Science of the Republic of Serbia(RS) 43001 Institutional research plan: CEZ:AV0Z50070508 Keywords : new invasive species * Serbia * DNA barcoding Subject RIV: EG - Zoology Impact factor: 1.895, year: 2013

  16. Effects of Cylindrospermopsis raciborskii strains (Woloszynska, 1912 Senayya & Subba Raju on the mobility of Daphnia laevis (Cladocera, Daphniidae

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    GC Restani

    Full Text Available Cylindrospermopsis raciborskii is a cyanobacterium distributed worldwide that is known to produce cyanotoxins. Some of the Brazilian strains can produce saxitoxins (STXs, which are classified as neurotoxins and can paralyze cladocerans .Daphnia laevis is a cladoceran with a wide distribution in the Americas and has been studied as a possible test-organism in toxicity bioassays. The present work tested the acute effect on D laevis mobility when fed a saxitoxin-producing (STX and neoSTX C. raciborskii strain, CYRF-01, and compared the results with the effects of a non-toxic strain (NPCS-1. Neonates (6-24 hours after birth were exposed to concentrations of C. raciborskii varying from 102 to 106 cells·mL–1 of each strain for up to three hours. The cladocerans were then transferred to a medium without toxic filaments for 24 hours. Only the organisms exposed to the STX-producing strain showed signs of the immobilization of swimming movements, confirming the effects of the toxins. There was a linear correlation between the time required to induce stopping the swimming movement, with a shorter time to needed to induce immobilization at a higher the concentration; this correlation was inverse to the time required to recover the swimming movements (longer at higher concentrations, p < 0.1. D. laevis is a tropical and subtropical species with great potential for use in toxicity tests for the detection of STXs, despite being native to and found in a great array of freshwater bodies. This is the first assay testing STX-producing and non-producing C. raciborskii strains on D. laevis, species that are both found in Brazilian ecosystems.

  17. Effects of Cylindrospermopsis raciborskii strains (Woloszynska, 1912) Senayya & Subba Raju on the mobility of Daphnia laevis (Cladocera, Daphniidae).

    Science.gov (United States)

    Restani, G C; Fonseca, A L

    2014-02-01

    Cylindrospermopsis raciborskii is a cyanobacterium distributed worldwide that is known to produce cyanotoxins. Some of the Brazilian strains can produce saxitoxins (STXs), which are classified as neurotoxins and can paralyze cladocerans .Daphnia laevis is a cladoceran with a wide distribution in the Americas and has been studied as a possible test-organism in toxicity bioassays. The present work tested the acute effect on D laevis mobility when fed a saxitoxin-producing (STX and neoSTX) C. raciborskii strain, CYRF-01, and compared the results with the effects of a non-toxic strain (NPCS-1). Neonates (6-24 hours after birth) were exposed to concentrations of C. raciborskii varying from 102 to 106 cells·mL-1 of each strain for up to three hours. The cladocerans were then transferred to a medium without toxic filaments for 24 hours. Only the organisms exposed to the STX-producing strain showed signs of the immobilization of swimming movements, confirming the effects of the toxins. There was a linear correlation between the time required to induce stopping the swimming movement, with a shorter time to needed to induce immobilization at a higher the concentration; this correlation was inverse to the time required to recover the swimming movements (longer at higher concentrations, p < 0.1). D. laevis is a tropical and subtropical species with great potential for use in toxicity tests for the detection of STXs, despite being native to and found in a great array of freshwater bodies. This is the first assay testing STX-producing and non-producing C. raciborskii strains on D. laevis, species that are both found in Brazilian ecosystems.

  18. Tritrophic associations and taxonomic notes on Lysiphlebus fabarum (Marshall) (Hymenoptera: Braconidae: Aphidiinae), a keystone aphid parasitoid in Iran

    Czech Academy of Sciences Publication Activity Database

    Rakhshani, E.; Starý, Petr; Tomanović, Ž.

    2013-01-01

    Roč. 65, č. 2 (2013), s. 667-680 ISSN 0354-4664 Grant - others:Ministry of Education and Science of the Republic of Serbia(RS) 430001 Institutional support: RVO:60077344 Keywords : host associations * Aphis * Brachycaudus Subject RIV: EH - Ecology, Behaviour Impact factor: 0.607, year: 2013 http://archonline.bio.bg.ac.rs/VOL65/SVESKA2/32%20-%20Rakhshani.pdf

  19. forecasting in one-dimensional and generalized integrated

    African Journals Online (AJOL)

    GLOBAL JOURNAL OF MATHEMATICAL SCIENCES VOL. ... models and their application can be found in Subba Rao (1981), Pham and Tran (1981), Gabr and Subba ... J. F. Ojo, Department of Statistics, University of Ibadan, Ibadan, Nigeria.

  20. Beyond Earnings and Social Reproduction: Can College Lead to Good Jobs Without Reproducing Social Inequalities?

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    James E. Rosenbaum

    2016-04-01

    Full Text Available College-for-all has become the educational policy in the United States, and it has led to many changes. Postsecondary subbaccalaureate (sub-BA credentials (certificates and associate's degrees are an increasing portion of college credentials, and we examine the implications for the reproduction of social inequalities. We find that despite the growth of sub-BA credentials, many students who enroll in college continue to get no credentials. After replicating prior findings of sub-BA employment and earnings payoffs, using the 2004–2012 Educational Longitudinal Study (ELS survey, we analyze the AddHealth survey to see whether sub-BA credentials are associated with jobs with nonmonetary job rewards similar to those BAs get (autonomy, career relevance, and so on. Moreover, although BA degrees often reproduce social and academic inequalities, we examine whether sub-BA credentials pose socioeconomic status (SES and test score obstacles to credential completion, and to employment and earnings within credentials. Beyond the usual earnings payoffs in prior research, we conclude that sub-BA credentials provide ways college students can attain desirable job rewards while avoiding SES and test score obstacles. We speculate on possible reasons and policy implications.

  1. Distribution and nests of paper wasps of Polistes (Polistella) in northeastern Vietnam, with description of a new species (Hymenoptera, Vespidae, Polistinae)

    Science.gov (United States)

    Nguyen, Lien Thi Phuong; Kojima, Jun-ichi

    2014-01-01

    Abstract Seven species of the subgenus Polistella Ashmead of the genus Polistes Latreille including a new species, P. brunetus Nguyen & Kojima, sp. n. described here, are recognized to occur in northeastern Vietnam, the easternmost part of the eastern slope of the Himalayas. A key to these species is provided. Their distributional records are remarked. Nests of P. delhiensis Das & Gupta, P. mandarinus de Saussure and P. brunetus are also described. PMID:24478582

  2. A review of aphid parasitoids and their associations in Algeria (Hymenoptera: Braconidae: Aphidiinae; Hemiptera: Aphidoidea)

    Czech Academy of Sciences Publication Activity Database

    Laamari, M.; Chaouche, S. T.; Halimi, C. W.; Benferhat, S.; Abbes, S. B.; Khenissa, N.; Starý, Petr

    2012-01-01

    Roč. 20, č. 1 (2012), s. 161-170 ISSN 1021-3589 Institutional research plan: CEZ:AV0Z50070508 Keywords : parasitoids * Diuraphis noxia * Lysiphlebus testaceipes Subject RIV: EH - Ecology, Behaviour Impact factor: 0.969, year: 2012 http://www.bioone.org/doi/pdf/10.4001/003.020.0120

  3. Fulltext PDF

    Indian Academy of Sciences (India)

    Admin

    did not get the recognition by way of awards or prizes, least of all the Nobel Prize. ... Nobel Prize evokes aspiration. ... worth of SubbaRow's contributions to the medical world. It is ... It so happened that the next year was his birth centenary.

  4. Sulphur oxidising bacteria in mangrove ecosystem: A review

    African Journals Online (AJOL)

    SAM

    2014-07-16

    Jul 16, 2014 ... factors such as salinity and nutrient availability highly variable. Mangrove .... sulphate and converts it into organic sulphur compound. (Subba Rao ..... of organic fertilizer long favored in Australia. .... Fish. Technol. Soc. 21:126-130. Dias ACF, Andreote FD, Rigonato J, Fiore MF, Melo IS, Araujo WL. (2010).

  5. 15-00506_SI.docx

    Indian Academy of Sciences (India)

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    HARINATH YAPATIa, SUBBA RAO DEVINENIb, SURESH CHIRUMAMILLAa and SESHAIAH KALLURUa,*. aInorganic and Analytical Chemistry Division, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India. bResearch and Development Centre, Micro Labs Ltd., API Division, Bommasandra-Jigini Link ...

  6. Effect of Temperature and Hose Genotype on Components of ...

    African Journals Online (AJOL)

    Effect of Temperature and Hose Genotype on Components of Resistance to Groundnut Rust. P Subrahmanyam, PV Subba Rao, PM Reddy, D McDonald. Abstract. The effects of temperature on incubation period, infection frequency, lesion diameter, leaf area damage, pustule rupture, and sporulation were quantified for six ...

  7. Journal of Chemical Sciences | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Synthesis, characterization and studies on antioxidant and molecular docking of metal complexes of 1-(benzo[d]thiazol-2-yl)thiourea · Harinath Yapati Subba Rao Devineni Suresh Chirumamilla Seshaiah Kalluru · More Details Abstract Fulltext PDF. In the present study, a new thiourea derivative bearing benzothiazole ...

  8. Fulltext PDF

    Indian Academy of Sciences (India)

    Admin

    the 100 Meter Dash. Priyanka de Souza and Vijay A Singh. Front Cover. Microstructures of seashells. (see article on page 573). Inside Back Cover. Flowering Trees. Credit: Navendu Page, Ilse. Back Cover. Yellapragada Subba Row. (1895-1948). (Illustration: Subhankar Biswas ). -MM-. RESONANCE | June 2012. 531.

  9. Characterization of Azotobacter from roots of a weed growing in ...

    African Journals Online (AJOL)

    asdf

    2012-06-05

    Jun 5, 2012 ... produced by Azospirillum brasilense and their effect on the growth of pearl millet (Pennisetum americanum L). Appl. Environ. Microbiol. 37: 1016-1024. Tilak KVBR, Sigh CS, Roy NK, Subba Rao NS (1982). Azospirillum brasilense and Azotobacter chrococum inoculum: Effect on yield of maize (Zea mays) ...

  10. Membrane Trafficking and Vesicle Fusion

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 19; Issue 5. Membrane Trafficking and Vesicle Fusion: Post-Palade Era Researchers Win the Nobel Prize. Riddhi Atul Jani Subba Rao Gangi Setty. General Article Volume 19 Issue 5 May 2014 pp 421-445 ...

  11. Fulltext PDF

    Indian Academy of Sciences (India)

    G S R Subba Rao, Department of Organic Chemistry,. Indian Institute of Science, Bangalore 560 012,. India. all the mathematicians of that time who enter and exit the stage, giving a fair account of themselves. Here then is a brief account of this remarkable book written with great empathy and feeling for the mathematics and.

  12. Potential candidates for biological control of the black bean aphid Aphis fabae in Serbia

    Directory of Open Access Journals (Sweden)

    Stanković, S.S.

    2015-09-01

    Full Text Available The black bean aphid is widely spread aphid species in the Palaearctic, known to attack over 1150 plant species. Because some of the host plants are of great agricultural interest, Aphis fabae represent a very important pest. We assembled all data concerning the presence of this pest and connected it in tritrophic associations. In the period of 24 years investigation on the territory of Serbia it has been recorded in 107 trophic associations. In total there are 145 findings of A. fabae parasitized by 19 taxa of Aphidiinae (Brackonidae from seven genera. The most suitable biocontrol agents for the black bean aphid are Lysiphlebus fabarum, Binodoxys angelicae, Lipolesis gracilis and the introduced species Lysiphlebus testaceipes.

  13. Dicty_cDB: Contig-U16097-1 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available 57 ) IST_WI5_41897 AD-ORFeome1.0 library Caenorhabditi... 34 0.25 3 ( EH014482 ) USDA-FP_182318 Lysiphlebus testaceipes adult... 0.022 3 ( AL403895 ) T3 end of clone AT0AA011F08 of library AT0AA from... 52 0.023 2 ( CT792924 ) Paramecium tetraure...80 Lysiphlebus testaceipes adult whol... 48 0.89 1 ( EG662946 ) RCLG567TP Castor bean cDNA library from leav...... 34 0.38 3 ( CK589256 ) IST_WI5_41896 AD-ORFeome1.0 library Caenorhabditi... 34 0.41 3 ( M38794 ) Dic...42 2 ( BX672039 ) Sus Scrofa library (scac) clone scac0035.p.08, 3p... 36 0.042 3 ( AC114265 ) Dic

  14. Dicty_cDB: Contig-U16090-1 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available us leaf cDNA library Populus tremul... 46 6e-04 2 ( BJ279262 ) Triticum aesti... USDA-FP_186955 Lysiphlebus testaceipes adult whol... 50 1e-09 4 ( AL115000 ) Botrytis cinerea strain T4 cDNA library...-12 2 ( AL115390 ) Botrytis cinerea strain T4 cDNA library. 66 1e-12 2 ( EH017168 ) USDA-FP_182606 Lysiphlebus testaceipes adult...NA... 52 5e-08 2 ( BI127108 ) I086P23P Populus leaf cDNA library Populus tremul.....hophyton rubrum cDNA library 8 Tric... 48 6e-04 2 ( FC653988 ) CAXW13373.rev CAXW Lotti

  15. Introduction to the Mymaridae (Hymenoptera of Bangladesh

    Directory of Open Access Journals (Sweden)

    John T. Huber

    2017-05-01

    Full Text Available An identification key to the 15 genera of Mymaridae found so far in Bangladesh is given, based on about 520 specimens collected using yellow pan traps placed in agricultural habitats and at the edge of ponds, mainly at Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur. Species already reported from Bangladesh are listed and three more are added: Acmopolynema orientale (Narayanan, Subba Rao & Kaur, Himopolynema hishimonus Taguchi, and Mymar pulchellum Curtis.

  16. Book review: 'Four Decades of Marine Geosciences in India - A Retrospect, National Seminar organised in connection with 150 th year celebration of Geological Survey of India. Mangalore 14-16, March 2001'

    Digital Repository Service at National Institute of Oceanography (India)

    Rao, V.P

    , Geological Survey of India, 27 Jawaharlal Nehru Road, Kolkata - 700 016. 325p, Price INR: 575/-, US$: 32/-, UK?: 20/- Marine Geology is a relatively young branch of Geology. It was initiated in India at the Andhra University, Waltair in the late 40's... group at NIO, Goa. Further, it is not out of place to mention the names of Professors C. Mahadevan, M. Poornachandra Rao and M. Subba Rao from Andhra University, and Shri R.R. Nair and Dr. M.G.A.P. Setty from NIO, Dr. V.V. Sastry from Oil and Natural Gas...

  17. Dicty_cDB: FC-BC16 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available FC (Link to library) FC-BC16 (Link to dictyBase) - - - Contig-U15105-1 FC-BC16Z (Li...nk to Original site) - - FC-BC16Z 620 - - - - Show FC-BC16 Library FC (Link to library) Clone ID FC-BC16 (Link to dict...yBase) Atlas ID - NBRP ID - dictyBase ID - Link to Contig Contig-U15105-1 Original site URL http://dict...4 2e-66 AY961522_1( AY961522 |pid:none) Lysiphlebus testaceipes ribosomal ... 254 2e-66 AF402813_1( AF402813 |pid:none) Ict...hondrial 4.0 %: nuclear >> prediction for FC-BC16 is cyt 5' end seq. ID - 5' end seq. - Length of 5' end seq

  18. Dicty_cDB: Contig-U13006-1 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available A-FP_182294 Lysiphlebus testaceipes adult whol... 34 3.0 2 ( BU896130 ) X036A07 Populus wood cDNA library Populus tremul...1.r GM_WBc Glycine max genomic clone ... 34 2.9 2 ( DN492755 ) X036A07.3pR Populus wood cDNA library Populus tre...... 34 2.9 2 ( DN502768 ) X036A07.5pR Populus wood cDNA library Populus tre... 34 2.9 2 ( EH014215 ) USD..... 34 2.4 2 ( EU795178 ) Uncultured bacterium HF0010_09O16 genomic sequence. 34 2.4 2 ( AC182691 ) Populus tric...itermes flavipes symbiont library ... 36 3.2 2 ( DQ927304 ) Tetrahymena paravorax strain RP m

  19. A new species of Symbra (Hymenoptera, Eurytomidae, Heimbrinae from dry forest in Brazil and new occurrence records for other Heimbrinae

    Directory of Open Access Journals (Sweden)

    Daniell Rodrigo Rodrigues Fernandes

    2012-12-01

    Full Text Available The geographic ranges of Heimbra opaca (Ashmead, 1894, H. bicolor Subba Rao, 1978 and H. parallela Stage & Snelling, 1986 are extended based on study of material deposited in the entomological collections of the Laboratório de Sistemática e Bioecologia de Parasitoides e Predadores da APTA (Ribeirão Preto, SP, Brazil of the Instituto Brasileiro de Geografia e Estatística (Brasília, DF, Brazil. Symbra potiguara Perioto & Fernandes sp. nov. (Hymenoptera, Eurytomidae is described, illustrated and compared with S. cordobensis Stage & Snelling, 1986, the single species previously known for this genus. A key to the genera of Heimbrinae and to the species of Symbra is provided.

  20. Occurrence and parasitism of aphids (Hemiptera: Aphididae on cultivars of irrigated oat (Avena spp. in São Carlos, Brazil

    Directory of Open Access Journals (Sweden)

    Júlio Cesar Ronquim

    2004-06-01

    Full Text Available The interactions between aphids and their Hymenopteran parasitoids on irrigated oats as well as the response of different cultivars of cereals regarding the resistance to these aphids and the influence on the host/parasitoid relationships were studied during two years in São Carlos, Brazil. Rhopalosiphum padi (L. was the predominant aphid observed throughout the study, while the other species were rarely found. Five species of parasitic Hymenoptera were found: three primary parasitoids, Lysiphlebus testaceipes (Cresson, Aphidius colemani (Viereck and Diaeretiella rapae (M'Intosh and two hyperparasitoids, Syrphophagus aphidivorus (Myer and Alloxysta brassicae (Ashmead. The UPF 86081 cultivar presented significant results regarding lower Rhopalosiphum padi contamination and higher aphid parasitism rates than those observed on some other cultivars. No significant effect on the percentage variation of parasitoid emergence on the mummified aphids was observed throughout this study.Foram avaliadas as interações entre afídeos e seus himenópteros parasitóides em cultivares de aveia irrigada, como também a resposta de diferentes cultivares em relação resistência à estes afídeos e a influência nas relações hospedeiro/parasitóide durante dois anos em São Carlos, SP, Brasil. Rhopalosiphum padi (L. foi o afídeo predominante ao longo do estudo, enquanto as outras espécies raramente foram encontradas. Foram observadas cinco espécies de himenópteros parasitóides: três parasitóides primários, Lysiphlebus testaceipes (Cresson, Aphidius colemani (Viereck e Diaeretiella rapae (M'Intosh e dois hiperparasitóides, Syrphophagus aphidivorus (Myer and Alloxysta brassicae (Ashmead. A cultivar UPF 86081 apresentou resultados significativos quanto à baixa infestação por Rhopalosiphum padi e maiores taxas de parasitismo que a demais cultivares. Não foi observado efeito significativo na variação de porcentagem de emergência de parasit

  1. 1st Conference of the International Society for Nonparametric Statistics

    CERN Document Server

    Lahiri, S; Politis, Dimitris

    2014-01-01

    This volume is composed of peer-reviewed papers that have developed from the First Conference of the International Society for NonParametric Statistics (ISNPS). This inaugural conference took place in Chalkidiki, Greece, June 15-19, 2012. It was organized with the co-sponsorship of the IMS, the ISI, and other organizations. M.G. Akritas, S.N. Lahiri, and D.N. Politis are the first executive committee members of ISNPS, and the editors of this volume. ISNPS has a distinguished Advisory Committee that includes Professors R.Beran, P.Bickel, R. Carroll, D. Cook, P. Hall, R. Johnson, B. Lindsay, E. Parzen, P. Robinson, M. Rosenblatt, G. Roussas, T. SubbaRao, and G. Wahba. The Charting Committee of ISNPS consists of more than 50 prominent researchers from all over the world.   The chapters in this volume bring forth recent advances and trends in several areas of nonparametric statistics. In this way, the volume facilitates the exchange of research ideas, promotes collaboration among researchers from all over the wo...

  2. Planktonic production and respiration in a subtropical lake dominated by Cyanobacteria.

    Science.gov (United States)

    Tonetta, D; Laudares-Silva, R; Petrucio, M M

    2015-05-01

    Planktonic primary production and respiration rates were estimated in a subtropical coastal lake dominated by Cyanobacteria in order to investigate the temporal and vertical variation in this lake and to evaluate its relationships with limnological variables and phytoplankton. Light and dark bottles were incubated at four different depths in the central part of the lake and were performed bimonthly from June/2009 to December/2010. No significant difference was evident among depths in relation to phytoplankton, limnological variables and metabolic rates. However, the highest production rates were recorded at the surface, and decreased towards the bottom, coupled with phytoplanktonic photosynthetic capacity. Wind induced mixing in Peri Lake played an important role in nutrient and phytoplankton redistribution, characterizing this lake as polymictic. According to density and biovolume, the phytoplankton community was dominated by filamentous Cyanobacteria, especially Cylindrospermopsis raciborskii (Woloszynska) Seenayya and Subba-Raju. This study has shown that both water temperature and nutrient availability drive phytoplankton growth and consequently the temporal variation in metabolic rates, where respiration is higher than primary production.

  3. Planktonic production and respiration in a subtropical lake dominated by Cyanobacteria

    Directory of Open Access Journals (Sweden)

    D. Tonetta

    Full Text Available Planktonic primary production and respiration rates were estimated in a subtropical coastal lake dominated by Cyanobacteria in order to investigate the temporal and vertical variation in this lake and to evaluate its relationships with limnological variables and phytoplankton. Light and dark bottles were incubated at four different depths in the central part of the lake and were performed bimonthly from June/2009 to December/2010. No significant difference was evident among depths in relation to phytoplankton, limnological variables and metabolic rates. However, the highest production rates were recorded at the surface, and decreased towards the bottom, coupled with phytoplanktonic photosynthetic capacity. Wind induced mixing in Peri Lake played an important role in nutrient and phytoplankton redistribution, characterizing this lake as polymictic. According to density and biovolume, the phytoplankton community was dominated by filamentous Cyanobacteria, especially Cylindrospermopsis raciborskii (Woloszynska Seenayya and Subba-Raju. This study has shown that both water temperature and nutrient availability drive phytoplankton growth and consequently the temporal variation in metabolic rates, where respiration is higher than primary production.

  4. Lake viruses lyse cyanobacteria, Cylindrospermopsis raciborskii, enhances filamentous-host dispersal in Australia

    Science.gov (United States)

    Pollard, Peter C.; Young, Loretta M.

    2010-01-01

    Globally, cyanobacterial blooms are increasing along with observations of the controlling influence of viruses. Our aim here was to test whether viruses from an Australian freshwater lake could lyse the cyanobacterium Cylindrospermopsis raciborskii (Woloszynska) Seenaya and Subba Raju. C. raciborskii was selectively isolated from Lake Samsonvale southeast Queensland Australia using a Modified Jaworski Medium (without any form of inorganic nitrogen). Microscopy confirmed the resulting culture of a single cyanobacterial species. Natural viral-like particles (VLPs) were incubated with C. raciborskii cells, the host abundance decreased by 86% in 5 days, while the number of VLPs increased stepwise. As a cell lysed, the filaments of cells split into smaller, but viable, fragments. This process may help disperse the cyanobacterium in the wild. Hence the use of this virus to control blooms may inadvertently encourage the dispersal of toxic filamentous cyanobacteria. The cyanophage (virus infecting cyanobacteria) replication time was 21 h, with an average burst size of 64 viruses cell -1. Transmission Electron Microscopy showed this cyanophage for C. raciborskii, with its long, non-contractile tail and a capsid diameter of 70 nm, belongs to the Siphoviridae family of viruses. This cyanophage can affect the abundance and distribution of the cyanobacterium C. raciborskii in this Australian freshwater lake.

  5. Design of multiligand inhibitors for the swine flu H1N1 neuraminidase binding site

    Directory of Open Access Journals (Sweden)

    Narayanan MM

    2013-08-01

    Full Text Available Manoj M Narayanan,1,2 Chandrasekhar B Nair,2 Shilpa K Sanjeeva,2 PV Subba Rao,2 Phani K Pullela,1,2 Colin J Barrow11Centre for Chemistry and Biotechnology, Deakin University, Geelong, VIC, Australia; 2Bigtec Pvt Ltd, Rajajinagar, Bangalore, IndiaAbstract: Viral neuraminidase inhibitors such as oseltamivir and zanamivir prevent early virus multiplication by blocking sialic acid cleavage on host cells. These drugs are effective for the treatment of a variety of influenza subtypes, including swine flu (H1N1. The binding site for these drugs is well established and they were designed based on computational docking studies. We show here that some common natural products have moderate inhibitory activity for H1N1 neuraminidase under docking studies. Significantly, docking studies using AutoDock for biligand and triligand forms of these compounds (camphor, menthol, and methyl salicylate linked via methylene bridges indicate that they may bind in combination with high affinity to the H1N1 neuraminidase active site. These results also indicate that chemically linked biligands and triligands of these natural products could provide a new class of drug leads for the prevention and treatment of influenza. This study also highlights the need for a multiligand docking algorithm to understand better the mode of action of natural products, wherein multiple active ingredients are present.Keywords: neuraminidase, influenza, H1N1, multiligand, binding energy, molecular docking, virus

  6. An intergalactic absorbing cloud in the neighbourhood of the North galactic pole

    International Nuclear Information System (INIS)

    Murawski, W.

    1983-01-01

    The purpose of this investigation is to study the possibility that the lack of galaxies in the area between the Virgo and Coma clusters, to which OKROY (1965) drew attention, is due to an intergalactic cloud. Using Zwicky's Catalogue of Galaxies and Clusters of Galaxies, it is shown that there is a shortage of galaxies in the suspected area for all magnitude classes. The absorption of the cloud is calculated to be 0.45+-05 mag. A quantity called the areal colour index (ACI) is introduced and defined as ACI=a sub(b) b sub(b)/(a sub(r) b sub(r)) where a and b are the lengths of the major and minor axes of a galaxy, respectively, and the subscripts b and r respectively refer to measurements on the blue and red prints of the Palomar survey, given in the Uppsala Catalogue of Galaxies. The average ACI is found to be 1.25 for the control area, and 1.04 for the area covered by Okroy's alleged obscuring cloud. On the basis of this colour data an approximate map showing the shape of the cloud is given. The effect of the alleged cloud on the shape frequency of types of galaxies is discussed. It is found that the cloud significantly increases the ratio of elliptical and dwarf galaxies to SO's. The determination of the distance to the cloud and its density is discussed. (author)

  7. Aphid parasitoids that occur on wheat crops of Northeast of the Parana State with recovery of Aphidius rhopalosiphi in BrazilParasitoides de pulgões-do-trigo que ocorrem no Norte do estado do Paraná e recaptura de Aphidius rhopalosiphi no Brasil

    Directory of Open Access Journals (Sweden)

    Adriano Thibes Hoshino

    2012-02-01

    Full Text Available Aphids (Hemiptera: Aphididae are the main pest of wheat (Hemiptera: Aphididae in several countries. In Brazil, the Biological Control of Wheat Aphids released millions of aphid parasitoids (Hymenoptera: Braconidae and Aphelinidae on wheat fields and in the present moment the chemical control is rarely necessary. However, since the 80’s few studies was carried out to evaluate the species established in Brazil. For this reason, the aim of this study was to record the species of aphid parasitoids that occur in wheat in the northern region of Parana state, Brazil. Four commercial wheat fields were investigated in the agricultural years of 2008 and 2009. The aphid parasitoids were captured with traps (Moericke and Malaise and aphid mummified were collected. In total, six species of parasitoids were found, Aphidius colemani, A. uzbekistanicus, A. ervi, Aphidius rhopalosiphi, Diaeretiella rapae e Lysiphlebus testaceipes. These results contribute with the register of three exotic species in Parana, and confirm the establishment of A. rhopalosiphi in the country. We emphasize the need for further studies in other regions of the country, as other species introduced also need to have their establishment confirmed.Os pulgões (Hemiptera: Aphididae são pragas de extrema importância em cereais de inverno no mundo todo. No Brasil, o programa Controle Biológico de Pulgões do Trigo liberou milhões de parasitoides (Hymenoptera: Braconidae e Aphelinidae nas áreas tritícolas, reduzindo expressivamente a população da praga, e atualmente raramente o controle químico se faz necessário. Entretanto, desde a década de 80 poucos trabalhos de campo tem sido realizados para verificar as espécies efetivamente estabelecidas no País. Por esta razão, este estudo objetivou registrar as espécies de parasitoides de pulgões ocorrentes em lavouras de trigo na região Norte no Paraná. O trabalho foi realizado em quatro áreas comerciais de trigo, durante as safras

  8. Habitat affinity of resident natural enemies of the invasive Aphis glycines (Hemiptera: Aphididae), on soybean, with comments on biological control.

    Science.gov (United States)

    Brewer, Michael J; Noma, Takuji

    2010-06-01

    We integrated a natural enemy survey of the broader landscape into a more traditional survey for Aphis glycines Matsumura (Hemiptera: Aphididae), parasitoids and predatory flies on soybean using A. glycines-infested soybean, Glycine max (L.) Merr., placed in cropped and noncropped plant systems to complement visual field observations. Across three sites and 5 yr, 18 parasitoids and predatory flies in total (Hymenoptera: Aphelinidae [two species] and Bracondae [seven species], Diptera: Cecidomyiidae [one species], Syrphidae [seven species], Chamaemyiidae [one species]) were detected, with significant variability in recoveries detected across plant system treatments and strong contrasts in habitat affinity detected among species. Lysiphlebus testaceipes Cresson was the most frequently detected parasitoid, and no differences in abundance were detected in cropped (soybean, wheat [Triticum aestivum L.], corn [Zea mays L.], and alfalfa [Medicago sativa L.]) and noncropped (poplar [Populus euramericana (Dode) Guinier] and early successional vegetation) areas. In contrast, Binodoxys kelloggensis Pike, Starý & Brewer had strong habitat affinity for poplar and early successional vegetation. The low recoveries seasonally and across habitats of Aphelinus asychis Walker, Aphelinus sp., and Aphidius colemoni Viereck make their suitability to A. glycines on soybean highly suspect. The widespread occurrence of many of the flies reflects their broad habitat affinity and host aphid ranges. The consistent low field observations of parasitism and predation suggest that resident parasitoids and predatory flies are unlikely to contribute substantially to A. glycines suppression, at least during the conventional time period early in the pest invasion when classical biological control activities are considered. For selected species that were relatively well represented across plant systems (i.e., L. testaceipes and Aphidoletes aphidimyza Rondani), conservation biological control efforts

  9. Toxicity of fruit fly baits to beneficial insects in citrus

    Directory of Open Access Journals (Sweden)

    J.P. Michaud

    2003-03-01

    Full Text Available Two fruit fly baits, Nu-Lure®/malathion and GF-120 (Spinosad® were evaluated in the laboratory for non-target impacts on beneficial insects. Nu-Lure/malathion proved attractive and toxic to adults and larvae of the coccinellid species, Curinus coeruleus Mulsant, Cycloneda sanguinea L. and Harmonia axyridis Pallas, a lacewing species, Chrysoperla rufilabris Burmeister. The coccinellids Olla v-nigrum Mulsant, Scymnus sp. and nymphs of the insidious flower bug, Orius insidiosus (Say did not succumb to Nu-Lure baits, even in no-choice situations. Nu-Lure was also attractive and lethal to adults of two aphidophagous flies; Leucopis sp. and the syrphid fly Pseudodorus clavatus (F.. Both Nu-Lure and GF-120 caused significant mortality to the parasitoid wasps, Aphytis melinus De Bach and Lysiphlebus testaceipes Cresson, within 24 h of exposure. However, GF-120 caused no significant mortality to any coccinellid in either choice or no-choice situations, despite considerable consumption of baits. Adults of P. clavatus tended to avoid GF-120, although mortality was significant in no-choice tests. Although larvae and adults of the lacewing C. rufilabris consumed GF-120, mortality was delayed; adults died 48 -96 h post-exposure and those exposed as larvae died two weeks later in the pupal stage. The Nu-Lure bait did not appear palatable to any of the insects, but the high concentration of malathion (195,000 ppm caused rapid mortality to susceptible insects. Nu-Lure bait without malathion also caused significant mortality to flies and lacewings in cage trials. Although GF-120 bait appeared more benign overall, further research efforts are warranted to increase its selectivity for target fly species and reduce its attractiveness to parasitoids and lacewings. I conclude that the Florida "fly free zone" protocol in its current form is not compatible with an IPM approach to commercial citrus production.

  10. Parasitization of commercially available parasitoid species against the lettuce aphid, Nasonovia ribisnigri (Hemiptera: Aphididae).

    Science.gov (United States)

    Shrestha, G; Skovgård, H; Enkegaard, A

    2014-12-01

    The lettuce aphid, Nasonovia ribisnigri (Mosley), is an economically important pest of lettuce worldwide. Little documentation exists for the control efficacy of aphid parasitoids against N. ribisnigri. This laboratory study evaluated three commercially available parasitoid species: Aphidius colemani (Viereck), Lysiphlebus testaceipes (Cresson), and Aphelinus abdominalis (Dalman) for their mortality impact on N. ribisnigri. The green peach aphid Myzus persicae (Sulzer) was included as a reference aphid. The study showed that A. abdominalis successfully parasitized 39 and 13% of the offered N. ribisnigri and M. persicae, respectively, within a 24-h exposure period. In contrast, none of the lettuce aphids exposed to Ap. colemani or L. testaceipes were successfully parasitized, whereas 60 and 3.5% of M. persicae, respectively, were successfully parasitized within a 6-h exposure period. Lettuce aphid mortality due to incomplete parasitization was 26 and 31% when exposed to Ap. colemani and L. testaceipes, respectively, with corresponding values for M. persicae being 5 and 10%, respectively. Mortality as a result of incomplete parasitization when aphids were exposed to A. abdominalis was low for both aphid species. The total mortality inflicted by A. abdominalis within a 24-h exposure period was 51% for the lettuce aphids and significantly less (19%) for green peach aphids. In contrast, Ap. colemani inflicted a higher mortality in M. persicae (65%) compared with N. ribisnigri (26%) within a 6-h exposure period. L. testaceipes caused a greater mortality in N. ribisnigri as compared with M. persicae. This study concludes that A. abdominalis has the potential to be used against N. ribisnigri in inoculative biocontrol programs as compared with the other parasitoid species based on successful parasitization.

  11. Identification of top-down forces regulating cotton aphid population growth in transgenic Bt cotton in central China.

    Directory of Open Access Journals (Sweden)

    Peng Han

    Full Text Available The cotton aphid Aphis gossypii Glover is the main aphid pest in cotton fields in the Yangtze River Valley Cotton-planting Zone (YRZ in central China. Various natural enemies may attack the cotton aphid in Bt cotton fields but no studies have identified potential specific top-down forces that could help manage this pest in the YRZ in China. In order to identify possibilities for managing the cotton aphid, we monitored cotton aphid population dynamics and identified the effect of natural enemies on cotton aphid population growth using various exclusion cages in transgenic Cry1Ac (Bt+CpTI (Cowpea trypsin inhibitor cotton field in 2011. The aphid population growth in the open field (control was significantly lower than those protected or restricted from exposure to natural enemies in the various exclusion cage types tested. The ladybird predator Propylaea japonica Thunberg represented 65% of Coccinellidae predators, and other predators consisted mainly of syrphids (2.1% and spiders (1.5%. The aphid parasitoids Aphidiines represented 76.7% of the total count of the natural enemy guild (mainly Lysiphlebia japonica Ashmead and Binodoxys indicus Subba Rao & Sharma. Our results showed that P. japonica can effectively delay the establishment and subsequent population growth of aphids during the cotton growing season. Aphidiines could also reduce aphid density although their impact may be shadowed by the presence of coccinellids in the open field (likely both owing to resource competition and intraguild predation. The implications of these results are discussed in a framework of the compatibility of transgenic crops and top-down forces exerted by natural enemy guild.

  12. Vertical and temporal variation in phytoplankton assemblages correlated with environmental conditions in the Mundaú reservoir, semi-arid northeastern Brazil.

    Science.gov (United States)

    Lira, G A S T; Moura, A N; Vilar, M C P; Cordeiro-Araújo, M K; Bittencourt-Oliveira, M C

    2014-08-01

    The goal of this study was to analyse the vertical structure of the phytoplankton community at the Mundaú reservoir, located in the semi-arid region of northeastern Brazil, and to correlate it to environmental conditions over two distinct seasons, dry and rainy. Samples were collected bimonthly at eight depths in the dry and rainy season for analyses of the physical and chemical variables of the water, as well as density, abundance, dominance, species diversity index and equitability of the community. Analysis of variance (ANOVA-two way) was used to analyse the vertical and seasonal differences, and Canonical Correspondence Analysis (CCA) was used to assess associations between phytoplankton and environmental variables Cylindrospermopsis raciborskii (Woloszynska) Seenaya and Subba Raju was the only dominant species and Geitlerinema amphibium (C. Agardh) Anagnostidis, Merismopedia punctata Meyen and Synedra rumpens Kützing. Others six taxa were abundant in at least one of the samples. Distinct vertical distribution patterns were observed for the abundant taxa between depths and seasons. The cyanobacteria, with the exception of C. raciborskii, showed similar seasonal patterns, with higher densities in the dry season. The CCA showed a strong correlation between the density of the phytoplanktonic species and abiotic variables. The vertical changes in abundant taxa revealed distinct patterns regulated by the variation in the environmental factors that were directly linked to seasonality, with the success of one or more species being dependent on their life strategies and ecological needs. The present study restates the importance of environmental and seasonal factors for phytoplankton composition and distribution in a freshwater tropical reservoir through a vertical gradient.

  13. Vertical and temporal variation in phytoplankton assemblages correlated with environmental conditions in the Mundaú reservoir, semi-arid northeastern Brazil

    Directory of Open Access Journals (Sweden)

    GAST LIRA

    Full Text Available The goal of this study was to analyse the vertical structure of the phytoplankton community at the Mundaú reservoir, located in the semi-arid region of northeastern Brazil, and to correlate it to environmental conditions over two distinct seasons, dry and rainy. Samples were collected bimonthly at eight depths in the dry and rainy season for analyses of the physical and chemical variables of the water, as well as density, abundance, dominance, species diversity index and equitability of the community. Analysis of variance (ANOVA-two way was used to analyse the vertical and seasonal differences, and Canonical Correspondence Analysis (CCA was used to assess associations between phytoplankton and environmental variables Cylindrospermopsis raciborskii (Woloszynska Seenaya and Subba Raju was the only dominant species and Geitlerinema amphibium (C. Agardh Anagnostidis, Merismopedia punctata Meyen and Synedra rumpens Kützing. Others six taxa were abundant in at least one of the samples. Distinct vertical distribution patterns were observed for the abundant taxa between depths and seasons. The cyanobacteria, with the exception of C. raciborskii, showed similar seasonal patterns, with higher densities in the dry season. The CCA showed a strong correlation between the density of the phytoplanktonic species and abiotic variables. The vertical changes in abundant taxa revealed distinct patterns regulated by the variation in the environmental factors that were directly linked to seasonality, with the success of one or more species being dependent on their life strategies and ecological needs. The present study restates the importance of environmental and seasonal factors for phytoplankton composition and distribution in a freshwater tropical reservoir through a vertical gradient.

  14. Development of TIMP1 magnetic nanoformulation for regulation of synaptic plasticity in HIV-1 infection

    Directory of Open Access Journals (Sweden)

    Atluri VSR

    2016-08-01

    Full Text Available Venkata Subba Rao Atluri* Rahul Dev Jayant* Sudheesh Pilakka-Kanthikeel, Gabriella Garcia, Thangavel Samikkannu, Adriana Yndart, Ajeet Kaushik, Madhavan Nair Center for Personalized Nanomedicine, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA *These authors contributed equally to this work Abstract: Although the introduction of antiretroviral therapy has reduced the prevalence of severe forms of neurocognitive disorders, human immunodeficiency virus (HIV-1-associated neurocognitive disorders were observed in 50% of HIV-infected patients globally. The blood–brain barrier is known to be impermeable to most of antiretroviral drugs. Successful delivery of antiretroviral drugs into the brain may induce an inflammatory response, which may further induce neurotoxicity. Therefore, alternate options to antiretroviral drugs for decreasing the HIV infection and neurotoxicity may help in reducing neurocognitive impairments observed in HIV-infected patients. In this study, we explored the role of magnetic nanoparticle (MNP-bound tissue inhibitor of metalloproteinase-1 (TIMP1 protein in reducing HIV infection levels, oxidative stress, and recovering spine density in HIV-infected SK-N-MC neuroblastoma cells. We did not observe any neuronal cytotoxicity with either the free TIMP1 or MNP-bound TIMP1 used in our study. We observed significantly reduced HIV infection in both solution phase and in MNP-bound TIMP1-exposed neuronal cells. Furthermore, we also observed significantly reduced reactive oxygen species production in both the test groups compared to the neuronal cells infected with HIV alone. To observe the effect of both soluble-phase TIMP1 and MNP-bound TIMP1 on spine density in HIV-infected neuronal cells, confocal microscopy was used. We observed significant recovery of spine density in both the test groups when compared to the cells infected with HIV alone, indicting the

  15. EDITORIAL: Focus on Visualization in Physics FOCUS ON VISUALIZATION IN PHYSICS

    Science.gov (United States)

    Sanders, Barry C.; Senden, Tim; Springel, Volker

    2008-12-01

    the following features highlighting work in this collection and other novel uses of visualization techniques: 'A feast of visualization' Physics World December 2008 pp 20 23 'Seeing the quantum world' by Barry Sanders Physics World December 2008 pp 24 27 'A picture of the cosmos' by Mark SubbaRao and Miguel Aragon-Calvo Physics World December 2008 pp 29 32 'Thinking outside the cube' by César A Hidalgo Physics World December 2008 pp 34 37 Focus on Visualization in Physics Contents Visualization of spiral and scroll waves in simulated and experimental cardiac tissue E M Cherry and F H Fenton Visualization of large scale structure from the Sloan Digital Sky Survey M U SubbaRao, M A Aragón-Calvo, H W Chen, J M Quashnock, A S Szalay and D G York How computers can help us in creating an intuitive access to relativity Hanns Ruder, Daniel Weiskopf, Hans-Peter Nollert and Thomas Müller Lagrangian particle tracking in three dimensions via single-camera in-line digital holography Jiang Lu, Jacob P Fugal, Hansen Nordsiek, Ewe Wei Saw, Raymond A Shaw and Weidong Yang Quantifying spatial heterogeneity from images Andrew E Pomerantz and Yi-Qiao Song Disaggregation and scientific visualization of earthscapes considering trends and spatial dependence structures S Grunwald Strength through structure: visualization and local assessment of the trabecular bone structure C Räth, R Monetti, J Bauer, I Sidorenko, D Müller, M Matsuura, E-M Lochmüller, P Zysset and F Eckstein Thermonuclear supernovae: a multi-scale astrophysical problem challenging numerical simulations and visualization F K Röpke and R Bruckschen Visualization needs and techniques for astrophysical simulations W Kapferer and T Riser Flow visualization and field line advection in computational fluid dynamics: application to magnetic fields and turbulent flows Pablo Mininni, Ed Lee, Alan Norton and John Clyne Splotch: visualizing cosmological simulations K Dolag, M Reinecke, C Gheller and S Imboden Visualizing a silicon

  16. Solid State Ionics Advanced Materials for Emerging Technologies

    Science.gov (United States)

    Chowdari, B. V. R.; Careem, M. A.; Dissanayake, M. A. K. L.; Rajapakse, R. M. G.; Seneviratne, V. A.

    2006-06-01

    . Invited papers. Cathodic properties of Al-doped LiCoO[symbol] prepared by molten salt method Li-Ion batteries / M. V. Reddy, G. V. Subba Rao, B. V. R. Chowdari. Layered ion-electron conducting materials / M. A. Santa Ana, E. Benavente, G. González. LiNi[symbol]Co[symbol]O[symbol] cathode thin-film prepared by RF sputtering for all-solid-state rechargeable microbatteries / X. J. Zhu ... [et al.] -- Contributed papers. Contributed papers. Nanocomposite cathode for SOFCs prepared by electrostatic spray deposition / A. Princivalle, E. Djurado. Effect of the addition of nanoporous carbon black on the cycling characteristics of Li[symbol]Co[symbol](MoO[symbol])[symbol] for lithium batteries / K. M. Begam, S. R. S. Prabaharan. Protonic conduction in TiP[symbol]O[symbol] / V. Nalini, T. Norby, A. M. Anuradha. Preparation and electrochemical LiMn[symbol]O[symbol] thin film by a solution deposition method / X. Y. Gan ... [et al.]. Synthesis and characterization LiMPO[symbol] (M = Ni, Co) / T. Savitha, S. Selvasekarapandian, C. S. Ramya. Synthesis and electrical characterization of LiCoO[symbol] LiFeO[symbol] and NiO compositions / A. Wijayasinghe, B. Bergman. Natural Sri Lanka graphite as conducting enhancer in manganese dioxide (Emd type) cathode of alkaline batteries / N. W. B. Balasooriya ... [et al.]. Electrochemical properties of LiNi[symbol]Al[symbol]Zn[symbol]O[symbol] cathode material synthesized by emulsion method / B.-H. Kim ... [et al.]. LiNi[symbol]Co[symbol]O[symbol] cathode materials synthesized by particulate sol-gel method for lithium ion batteries / X. J. Zhu ... [et al.]. Pulsed laser deposition of highly oriented LiCoO[symbol] and LiMn[symbol]O[symbol] thin films for microbattery applications / O. M. Hussain ... [et al.]. Preparation of LiNi[symbol]Co[symbol]O[symbol] thin films by a sol-gel method / X. J. Zhu ... [et al.]. Electrochemical lithium insertion into a manganese dioxide electrode in aqueous solutions / M. Minakshi ... [et al.]. AC impedance