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