Trends in Biosciences

This study was carried out to determine the efficacy of eight insecticides viz., dimethoate, profenofos, lamb-dacyhalothrin, monocrotophos, indoxacarb, endosulfan, chlorpyriphos and multineem against the spotted bollworm, Earias vittella (Fabricius) on okra cultivars viz., Arka Anamica, Prabhani Kranti, Selection-9, Seed Tech-71, NBR-1, Hari Rani, Deepti, Green Gold, Ajeet-121, Ajeet-311 (Hybrid) during summer season of 2005–06. The highest suppression of fruit borer infestation was with lambda-cyhalothrin 14.60% and 27.07% while the lowest with multineem was 26.91 and 32.64% compared to untreated control with 40.41 and 36.09% infestation during 2005 and 2006. The highest seed yield was observed with application of dimethoate (234.9g) and lamb-dacyhalothrin (244.9g) and the lowest was with multineem (226.1g) and endusulfan (241.3g/10 plants) during2005 and 2006. All the insecticides proved significantly effective in controlling E. vittella infestation and the seed yield among treatments differed significantly in all cultivars of okra during both the years.