Field efficacy of insecticides against two different feeding guilds: the sap sucking Lipaphis erysimi (Kaltenbach) and foliage feeder Pieris brassicae (L.) infesting Indian mustard

Abstract

Turnip aphid, Lipaphis erysimi (Kaltenbach) and the large white butterfly, Pieris brassicae (L.) are important pests of
rapeseed-mustard in Punjab, India. In this study, we have attempted to evaluate four insecticides against both the pests
for their field efficacy at two locations. Among them thiamethoxam 25 WG @ 100 g ha-1, dimethoate 30 EC @ 1 litre ha-1,
quinalphos 25 EC @ 1 litre ha-1, and chlorpyriphos 20 EC @ 1.5 litre ha-1 successfully controlled turnip aphid at both the
locations. While, successful control of the large white butterfly was obtained only with treatments quinalphos 25 EC @
1 litre ha-1 and chlorpyriphos 20 EC @ 1.5 litre ha-1. Maximum seed yield was obtained in treatment chlorpyriphos 20 EC
@ 1.5 litre ha-1 followed by quinalphos 25 EC @ 1 litre ha-1at both the locations. Thus, spray of chlorpyriphos 20 EC @
1.5 litre ha-1 and quinalphos 25 EC @ 1 litre ha-1 could be the best option for control of both turnip aphid and the large
white butterfly.