author(s)
NK Berani and JJ Patel

abstract
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 2^nd week of October to 2^nd week of December i.e., 41^st SMW to 50^th SMW. The highest peak activity of aphid, jassid and mite was exhibited during 1^st week of November (45^th SMW) while, peak population of whitefly was recorded higher during 5^th week of October (44^th 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.