Population Dynamics of Major Insect-Pests on Different Varieties of Tomato (Solanum lycopersicum L.)

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 9th SMW (Standard Meteorological Week) with peak in 13th SMW and remained till 16th SMW on all the varieties except Punjab Red Cherry (up to 15th SMW). Amrasca devastans appeared in 8th and 7th SMW and attained peak during 14th and 13th SMW during 2019 and 2020, respectively. Helicoverpa armigera commenced in 10th SMW with attained peak in 16th 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.