author(s)
RP Chauhan, MV Vekaria, HK Chaudhary and NJ Chaudhary

abstract
Field studies were undertaken on the Agronomy Instructional Farm, CPCA, SDAU, Sardarkrushinagar to study the seasonal incidence of sucking pests of Bt cotton. The pest sequence study was undertaken in the five different cultivars viz., Ajit-155, Dinkar-7, Vikram-5, Jackpot and GTHH 49 BG II of Bt cotton. It was observed that the Bt cotton was invaded first between the third week of July to second week of August by group of sucking pests viz., aphid, jassid, thrips, whitefly and their damage continued throughout the crop season. Later on two another sucking pests viz., mealybug and mite were infested in Bt cotton crop during the second and last week of September, the period of activity of these two pests were also remained till the harvesting of crop.