Impact of Weather Parameters on Population of Bimisia Tabaci Genn. (Whitefly) and Oxycarenus Laetus Kirby (Dusky Cotton Bug) at Bharwari, Distt. Kaushambi, U.P.

Abstract

The small whitefly was found to be dusted with white waxy powder. Its nymphs and adults in the beginning sucked cell sap from leaf, resulting in curling and yellowing of leafs. The extent of damage was found to vary from 17.8 to 31.63 percent latter on this migrated to spread flower head, sucked cell sap from developing seeds, result in chaffy seeds to the extent of 13-27 percent. The flies were more abundant during in zaid crop. Population of whitefly during zaid 2001 and 2002 was not found to be correlated to any of the weather parameter but it was found correlated to maximum temperature directly (r= +0.827 and indirectly to minimum relative humidity (r= -0.829) during 2003.