Vol. 11, Special Issue 9 (2022)

Author(s):
Meinaz Nissar, Akhtar Ali Khan, Tahmina Mushtaq, Sarwajeet Singh Pathania and Asma Sherwani

Abstract:
An experiment was carried out to study the influence of abiotic environment on the population dynamics of whitefly (Trialeurodes vaporariorum) on Gerbera (G. jamesonii) crop at Plant Introduction Section, Tulip garden, Srinagar, India under polyhouse conditions during the years 2017 and 2018. The population trend of whitefly (T. vaporariorum) on Gerbera during 2017 and 2018 indicated that the whitefly population first appeared in 1^st fortnight of April and remained active till 2^nd fortnight of December. The adult population reached peak during 2^nd fortnight of September (67.33 adults/leaf) to 1^st fortnight of October (63.35 adults/leaf) while nymphal population reached to its peak value during 2^nd fortnight of August (37.34, 36.09 nymphs/leaf) during the two year study period, 2017 and 2018. The correlation of weather parameters with whitefly population on Gerbera revealed that the nymphal population exhibited positive significant correlation with maximum (r =0.687**, r= 0.646**) and minimum temperature (r=0.691**, r= 0.726**) while the adult population showed positive significant correlation with maximum temperature (0.594**, r= 0.473*) during both years.