Bio-efficacy of diafenthiuron 25% + pyriproxyfen 5% SE against sucking insect pests of Bt Cotton

Abstract

A field studies were conducted for two consecutive kharif seasons (2014-2015 and 2015-2016) with a view to evaluate the bioefficacy of diafenthiuron 25% + pyriproxyfen 5% SE @ 500, 750, 1000, 1250 ml/ha, difenthiuron 50 WP @ 600 g/ha, pyriproxyfen 10% EC (GSP sample) @ 1000 ml/ha and pyriproxyfen 10% EC @ 1000 ml/ha (marketed sample) against sucking insects pests of cotton. On the basis of efficacy, diafenthiuron 25% + pyriproxyfen 5% SE (1000 and 1250 ml/ha) found relatively more effective against sucking insect pests viz., aphids, leafhoppers, whiteflies and thrips. These two doses of diafenthiuron 25% + pyriproxyfen 5% SE also reflected on cotton seed yield.