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Bioefficacy of a newer insecticide emamectin benzoate 5% EC against cotton bollworms Raghuraman M., Birah Ajanta, Singh Brijesh, Gupta G. P. Division of Entomology, Indian Agricultural Research Institute, New Delhi, 110 012. Abstract Field trials were conducted during kharif seasons, 2004 and 2005 with American cotton variety Pusa 86 to determine the bioefficacy of a newer insecticide, emamectin benzoate 5% EC against bollworms in cotton. Emamectin benzoate EC formulation was evaluated at various doses along with its water soluble granule (WSG) formulation and a another semi-synthetic novel insecticide, spinosad. The EC formulation of emamectin benzoate at the dose of 11 g ai/ha was effective in reducing the incidence of bollworm complex and increased the yield of seed cotton by 97.3% and 89.4% over untreated control during 2004 and 2005 respectively. The WSG formulation of emamectin benzoate was also effective at the same dose (11 g ai/ha) in protecting the crop and increased the yield of seed cotton by 89.8 and 98.1% during both the years. The results suggest that the EC formulation of emamectin benzoate could be recommended as a component of sustainable management of bollworms in cotton. Top Key words Bollworms, emamectin benzoate formulation, spinosad, cotton yield. Top | | |
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