Field efficacy of newer insecticide formulation Ampligo 150 ZC against bollworm complex in cotton

摘要

Present study investigated the bioefficacy of Ampligo 150 ZC (Chlorantraniliprole 9.3% + Lambda cyhalothrin 4.6% ZC) in cotton. Ampligo 150ZC at 37.5, 45 and 60 g a.i./ ha was highly effective in checking the larval population of Earias spp, Helicoverpa armigera and Pectinophora gossypiella as compared to other standard check Ampligo 150 ZC (30 g a.i./ ha), chloranatriliprole 18.5 SC @ 30 g a.i./ ha, quinalphos 25 EC @ 500 g a.i./ ha, deltamethrin 2.8 EC @ 12.5 g a.i./ ha and lambdacyhalothrin 4.9 CS@ 25 g a.i./ ha. Similarly, Ampligo 150 ZC except 30 g a.i./ ha recorded significant reduction in per cent damage on squares, bolls and loculi as compared to untreated control and standard treatments during both the years. There was no significant difference in population of natural enemies (Chrysoperla and spider) among the combined insecticide (Ampligo 150 ZC), standard insecticides and untreated control. Ampligo 150 ZC @ 60 g a.i./ ha recorded the lowest per cent square and boll damage at 14 DAT during kharif, 2011 and 2012, respectively. The lowest locule damage at harvest was also recorded in Ampligo 150 ZC @ 60 g a.i./ ha during tested period. It was however, at par with its lower doses @ 37.5 and 45 g a.i./ ha. Ampligo 150 ZC @ 60 g a.i./ ha was recorded the best treatment with lowest square, boll and locule damage as well as high yield in both years.