Journal of Experimental Agriculture International

Population dynamics studies of major insect-pests on seven varieties (Hisar Arun, Hisar Lalit, Pusa Ruby, Pusa Rohini, Red Cherry, Sona Cherry and Kesar Cherry) of tomato under open field conditions were undertaken at CCS Haryana Agricultural University, KVK Jhajjar during the years 2019 and 2020. Bemisia tabaci commenced in 9^th SMW (Standard Meteorological Week) with peak in 13^th SMW and remained till 16^th SMW on all the varieties except Punjab Red Cherry (up to 15^th SMW). Amrasca devastans appeared in 8^th and 7^th SMW and attained peak during 14^th and 13^th SMW during 2019 and 2020, respectively. Helicoverpa armigera commenced in 10^th SMW with attained peak in 16^th during both the years. Varietal response showed that the variety, Hisar Arun was least preferred by the A. devastans and B. tabaci. However, variety Pusa Rohini was showed least preference against H. armigera. Leafhopper and fruit borer population exhibited significant positive correlation with maximum and minimum temperature whereas significant negative correlation with the relative humidity.