Efficacy of new generation molecules against sucking pests and bollworms in cotton

Abstract

The field experiment was conducted during Kharif, 2016-17 and 2017-18 in the research field of the All India Coordinated Research Project on Cotton at the Regional Research and Technology Transfer Station, Bhawanipatna (OUAT) in Odisha to study the efficacy of new generation molecules against sucking pests and bollworms in cotton. The experiment was laid out in Randomized Block Design with eleven treatments in three replications. The mean data on insect population after two sprays indicated that application of Spinetoram 10% + Sulfoxaflor 40% WG @ 140 g a.i./ha recorded the minimum number of jassids (0.79/3 leaves), aphids (2.75/3 leaves) and thrips (0.46/3 leaves) followed by Spinetoram 10% + Sulfoxaflor 40% WG @ 120 g a.i/ha treated plot. Similar trend was observed in case of bollworms. After two sprays, significantly less incidence of Helicoverpa armigera and Earias vittella (0.17 larvae/5 plants) larvae were recorded in Spinetoram 10% + Sulfoxaflor 40% WG @ 140 g a.i./ha treated plot followed by Spinetoram 10% + Sulfoxaflor 40% WG @ 120 g a.i./ha treated plot. Maximum seed cotton yield (21.91 q/ha) was recorded in Spinetoram 10% + Sulfoxaflor 40% WG @ 120 g a.i./ha treated plot which was statistically at par with Spinetoram 10% + Sulfoxaflor 40% WG@ 120 g a.i/ha (21.71 q/ha), Spinetoram 12% SC @ 35 g a.i./ha (20.16 q/ha) and Sulfoxaflor 24% SC @ 105 g a.i./ha (20.06 q/ha) treated plots. The increase in seed cotton yield in Spinetoram 10% + Sulfoxaflor 40% WG @ 140 g a.i./ha was 36.51% more than the control (16.05 q/ha). Spinetoram 10% + Sulfoxaflor 40% WG@ 140 g a.i./ha treated plot recorded the maximum B:C ratio (2.31).