Yield losses due to sucking pests in summer cowpea

Abstract

Considering the yield and economics of insecticides, highest grain yield of cowpea 853 kg/ ha was recorded from the treatment of dinotefuran 0.006 per cent which was statistically at par with acetamiprid 0.004 per cent (816 kg/ha), spiromesifen 0.08 per cent (795 kg/ha), dimethoate 0.03 per cent (790 kg/ha) and flonicamid 0.02 per cent (752 kg/ha).The economics of different insecticidal treatments revealed that application acetamiprid 0.004 per cent proved to be the most economically viable treatment with maximum CBR (1:21.8). While, dimethoate 0.03 per cent emerged as second treatment with CBR (1:21.2). The other treatments, spiromesifen 0.08 per cent (1:9.8), dinetofuran 0.006 per cent (1:9.4), chlorfenapyr 0.0075 per cent (1:5.8), clothianidin 0.003 per cent (1:5.5) and flonicamid 0.02 per cent (1:4.8) appeared next in order.