Bioefficacy of diafenthiuron 50 WP from new source against sucking insect pests in Bt cotton
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Keywords:Btcotton, sucking insect pests, diafenthiuron 50 WP, seed cotton yield
Field studies were conducted during two consecutive Kharif seasons of 2011 and 2012 in order to evaluate theÂ bio-efficacy of diafenthiuron 50 WP from New source (NS) along with diafenthiuron 50 WP from Existing sourceÂ (EX) @ 300 g a.i./ha and imidacloprid 17.8 SL @ 20 g a.i./ha as standard check against sucking pest complex ofÂ cotton. Diafenthiuron 50 WP (NS)@ 300 g a. i./ha was found highly effective in reducing the population of aphid,Â jassid, thrips and whitefly in cotton followed by imidacloprid 17.8 SL @ 20 g a.i./ha. The seed cotton yield wasÂ also recorded to be significantly highest in diafenthiuron 50 WP (NS)@ 300 g a.i./ha (32.5 q/ha) followed byÂ imidacloprid 17.8 SL @ 20 g a.i./ha (30.2 q/ha) and diafenthiuron 50 WP (NS) @ 250 g a. i./ha. (30.1 q/ha).Â Considering the bio-efficacy and yield, diafenthiuron 50 WP (NS) @ 300 g a.i./ha was found effective againstÂ major sucking pests in Bt cotton.
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