Vol. 10, Special Issue 9 (2021)

Author(s):
Jemimah N, G Sridevi, V Anitha, G Uma Devi and MV Nagesh Kumar

Abstract:
Field experiment on bioefficacy of various insecticides against aphid, Lipaphis erysimi Kaltenbach and head borer, Hellula undalis Fabricius in cauliflower were conducted during rabi, 2018-19 and 2019-20 at College farm, College of Agriculture, PJTSAU, Rajendranagar, Hyderabad. Among the various insecticides tested, dimethoate was found effective against aphids by recording significantly highest per cent reduction of 78.61 and 77.68 followed by chlorpyriphos with 66.88 and 54.86 per cent reduction during 2018-19 and 2019-20, respectively at 7 days after first and second sprays. Chlorantraniliprole proved to be effective in reducing head borer by recording lowest mean per cent damaged heads of 10.36 per cent.