Population fluctuation of sucking insect pest of brinjal and its relation with weather parameters

The present investigations on population fluctuation of sucking insect pest of brinjal were carried out at College Farm, N.M. College of Agriculture, Navsari Agricultural University, Navsari during Kharif 2018-19 and 2019-20. The activity of sucking pests (aphid, jassid, whitefly and mite) was higher during 2nd week of October to 2nd week of December i.e., 41st SMW to 50th SMW. The highest peak activity of aphid, jassid and mite was exhibited during 1st week of November (45th SMW) while, peak population of whitefly was recorded higher during 5th week of October (44th SMW). Maximum temperature, bright sunshine hours and evaporation were significantly positively correlated with all the sucking pests population while, minimum temperature, relative humidity (morning, evening and mean), vapour pressure (morning, evening and mean), wind speed and rainfall were negetively correlated with all the sucking pests population.