WorldWideScience
 
 
1

Neotype Designation and Redescription of Toumeyella liriodendri (Gmelin) (Hemiptera: Coccoidea: Coccidae)  

UK PubMed Central (United Kingdom)

In order to clarify the taxonomic status and to preserve the stability of the species, a neotype is designated for the tuliptree scale: Coccus liriodendri Gmelin (now Toumeyella...Full Text Available

2

Comparative and phylogenomic studies on the mitochondrial genomes of Pentatomomorpha (Insecta: Hemiptera: Heteroptera)  

UK PubMed Central (United Kingdom)

BackgroundNucleotide sequences and the gene arrangements of mitochondrial genomes are effective tools for resolving phylogenetic problems. Hemipteroid insects are known to possess...Full Text Available

3

Sequential Sampling Plans for the Hairy Chinch Bug (Hemiptera: Lygaeidae)  

Science.gov (United States)

... was log (s2) = 1.183 + 1.692 log (x) (r2 = 0.96; df = 1, 43; F = 1067.40; P kc was calculated according to Ruesink (1980), using 15. ... ...

4

First occurrence of Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae) preying on defoliating caterpillars of oil palm in the state of Para, Brazil  

International Nuclear Information System (INIS)

The oil palm Elaeis guineensis is usually attacked by pests, particularly, defoliating caterpillars. Between 2004 and 2006 a stinkbug predator (Asopinae) was registered preying on caterpillars of Brassolis sophorae L., Opsiphanes invirae Hubner (Lepidoptera: Nymphalidae) and Sibine spp. (Lepidoptera: Limacodidae), reducing their populations in commercial oil palm plantations in the State of Para, Brazil. Specimens of the natural enemy were collected, mounted, and identified as Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae), corresponding to the first report of the occurrence of this stinkbug attacking defoliating caterpillars of oil palm in Brazil. (author)

2004-01-01

5

Development and thermal requirements of Orius insidiosus (Say) (Hemiptera: Anthocoridae); Desenvolvimento e exigencias termicas de Orius insidiosus (Say) (Hemiptera, Anthocoridae)  

Energy Technology Data Exchange (ETDEWEB)

The temperature strongly influences the development time of insects and the understanding of this aspect for natural enemies is essential for its use as biocontrol agents and for mass rearing purpose. The objective of this work was evaluating the effect of different temperatures on the development time of Orius insidiosus (Say, 1832) as well as its thermal requirements. The trials were conducted in climatic chamber at 16, 19, 22, 25, 28 and 31 {+-} 1 deg C; RH 70 {+-} 10% and photo phase 12h. Eggs of Anagasta kuehniella (Zeller, 1879) were provided as food. The embryonic period was 14.0, 8.9, 6.6, 4.8, 3.9 and 3.3 days at 16, 19, 22, 25, 28 and 31 deg C, respectively. Nymphs of all instars (independent of originated sex) were affected by the temperature on their development time; there was a reduction of this period with the increase of the temperature. Males and females presented a development time about 12 days at 25 deg C. The developmental thresholds (To) for egg stage was ...

2005-10-15

6

Rapid cold hardening increases cold and chilling tolerances more than acclimation in the adults of the sycamore lace bug, Corythucha ciliata (Say) (Hemiptera: Tingidae)  

British Library Electronic Table of Contents (United Kingdom)

The sycamore lace bug, Corythucha ciliata is a new, invasive pest of Platanus trees in China. Although C. ciliata is often subjected to acute low temperatures in early winter and spring in northern and eastern China, the cold tolerance of C. ciliata has not been well studied. The objectives of this study were to determine whether adults of C. ciliata are capable of rapid cold hardening (RCH), and to compare the benefits of RCH vs. cold acclimation (ACC) in the laboratory. When the adult females incubated at 26^oC were transferred directly to the discriminating temperature (-12^oC) for 2h, survival was only 22%. However, exposure to 0^oC for 4h before transfer to -12^oC for 2h induced RCH, i.e., increased survival to 68%. RCH could also be induced by gradual cooling of the insects at rates ...

2011-01-01

7

Impact of heavy metals on macro-invertebrate fauna of the thaddo stream  

International Nuclear Information System (INIS)

Impact of some heavy metals like zinc, lead, copper, chromium and cadmium were studied at four spots on the macro-invertebrate fauna of the Thaddo stream, a tributary of Malir River. This was in correlation with an earlier study on the physico-chemical aspects of water which showed a severe pollution in this stream. Present data for the qualitative and quantitative analyses of macro-invertebrates and the ranges of heavy metals (Zn 0.5-3.5, Pb 0.90-1.42, Cu 0.35-0.93, Cr 0.0-0.08 and Cd 0.003-0.01 ppm) in the water samples also indicate high level of pollution in the stream. Macro-invertebrate fauna comprises only of aquatic insects which include larvae of Chironomus spp., adults of the Notonectus sp., and nymphs of Gomphus sp. (dragon fly) belonging to the order Diptera , Hemiptera and Odonata, respectively. Quantitatively Notonectus sp. predominated and followed by Chironomus larvae. The maximum concentrations of all heavy metals were recorded at spot 3. A general ...

8

The role of high-resolution computed tomography (HRCT) and magnetic resonance imaging (MRI) in the diagnosis of preoperative and postoperative complications caused by acquired cholesteatomas; CT und MRT des erworbenen Cholesteatoms: Prae- und postoperative Bildgebung  

Energy Technology Data Exchange (ETDEWEB)

The role of high-resolution computed tomography (HRCT) and magnetic resonance imaging (MRI) in the diagnosis of preoperative and postoperative complications caused by acquired cholesteatomas will be described in this paper. The pre- and postoperative imaging of the temporal bone was performed with HRCT and MRI. HRCT and MRI were performed in the axial and coronal plane. MRI was done with T2 weighted and T1 weighted sequences both before and after the intravenous application of contrast material. All imaging findings were confirmed clinically or surgically. The preoperative cholesteatoma-caused complications depicted by HRCT included bony erosions of the ossicles, scutum, facial canal in the middle ear, tympanic walls including the tegmen tympani, and of the labyrinth. The preoperative cholesteatoma-caused complications depicted by MRI included signs indicative for labyrinthitis, and brain abscess. Postoperative HRCT depicted bony erosions caused by recurrent cholesteatoma, bony defects ...

2003-03-01