The population dynamics of sucking pests Bt cotton along with their correlation with weather factors were studied during 2008-2013 in five talukas of Buldana district, Maharashtra. According to five year average data the maximum aphid population ( per cent) was recorded in 33rd meteorological week whereas jassid population were reached maximum of jassid in 37th meteorological week. | Population dynamics of sucking pests with relation to weather parameters in bt cotton in Buldana district, Maharashtra, India