author(s)
Challa Nalini and Ashwani Kumar

abstract
The present trail was conducted to study population dynamics and efficacy of certain insecticides against sucking pests of okra during kharif season 2015. Results showed that the population of whitefly Bemesia tabaci) and leafhopper (Amrasca biguttula biguttula) has positive correlation with maximum temperature. Occurrence of whitefly and leafhopper commenced from 35^th standard week (August third week) and then the population gradually increased and reached to its peak by 41^st standard week (October second week) where after a decline in population was observed as temperature decreased. Dimethoate 30EC was found to be superior with a least population of 2.77 (whiteflies/3leaves) and 2.45 (leafhoppers/3leaves) respectively, followed by Spinosad 3.20 (whiteflies/3leaves), 3.34 (leafhoppers/3leaves), and all the treatments were found to be superior over the control.