1Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences Banaras Hindu University, Varanasi, 221005
Department of Entomology, G.B. Pant University of Agriculture and Technology, Pantnagar, 263145
*Corresponding author Email: premvijaybhu@gmail.com
Online published on 23 October, 2018.
To determine the population dynamics in relation to weather factors on the whitefly Bemisia tabaci; leafhopper, Amrasca biguttula biguttula; aphid, Aphis gossypii, a field experiment was conducted in okra at the Vegetable Research Centre (VRC), Pantnagar in kharif, 2014. The study revealed that the population of A. biguttula biguttula gradually increased and attained maximum (11.12 leafhopper/3 leaves) at 70 DAS in the 37th standard week (second week of September). The population of B. tabaci attained its peak (third week of September) (12.03 whitefly/3 leaves) at 70 DAS in the 37th standard week, while the population of A. gossypii attained maximum (22.5 aphids/3 leaf) peak at 56 DAS in the 35th standard week. The population of A. biguttula biguttula, B. tabaci and A. gossypii increased with maximum temperature and bright sunshine hours.
Population dynamics, sucking pests, whitefly, leafhopper, aphid, okra, temeperature, sunshine hours
