Ripening Stages of Rice Spikelets Selectively Damaged by Four Species of Rice Bugs, Leptocorisa chinensis Dallas (Hemiptera: Alydidae), Lagynotomus elongatus (Dallas) (Hemiptera: Pentatomidae), Cletus punctiger (Dallas) (Hemiptera: Coreidae) and Stenotus rubrovittatus (Matsumura) (Hemiptera: Miridae).
Establishment on labor saving mechanized operation system of cabbages using big-size seedlings at vegetable farms in urban suburbs. 1) Development on labor saving plantation and growth equalization techniques of big-size seedlings on land. i) Verification of uniform cultivation technique. A) Investigation on growth equalization technique of spring cabbages based on their roots cutting. a) A case of seeding on the first ten days of October.