Biology of rice green leafhopper, Nephotettix virescens (Distant) under laboratory conditions
2002
Salim, M. (National Agricultural Research Centre, Islamabad (Pakistan). Rice Programme)
Biology of rice green leafhopper, Nephotettix virescens (Distant) was studied at 24 degree / 16 degree centigrade, 28 degree / 20 degree centigrade, 32 degree / 24 degree centigrade and 36 degree / 28 degree centigrade day/night temperatures and 70% RH. Different stages of the insect have been described. Its incubation period was longest (16.5 plus minus 0.99 days) at 24 degree / 16 degree centigrade and decreased drastically (8.7 plus minus 0.98 days) at 28 degree / 20 degree centigrade. The developmental period of different nymphal instars of both males and females was longest at 24 degree / 16 degree centigrade and decreased with increase in temperature. Nymphal developmental period and adult life of females were comparatively longer than those of males at each temperature. Pre-oviposition and oviposition periods were longest at 24 degree /16 degree centigrade and shortest at 36 degree / 28 degree centigrade. The eggs were deposited in a row inside the slit made by the dagger like ovipositor of the female. Fecundity per female was lowest at 24 degree / 16 degree centigrade and increased with the increase in temperature from 24 degree / 16 degree centigrade to 32 degree /24 degree centigrade but it reduced with further increase in temperature.
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