Evaluation of synthetic insecticides and natural products against okra shoot and fruit borer, Earias vittella (Fab.) in Himachal Pradesh
Keywords:
Okra, shoot and fruit borer, Earias vittella, managementAbstract
Eight synthetic insecticides, biopesticides and natural products viz., azadirachtin, chlorantraniliprole, cypermethrin, emamectin benzoate, spinosad, brahmastra, cow urine followed by fermented butter milk and neemastra followed by drekastra were evaluated at two locations for their efficacy against okra shoot and fruit borer. Emamectin benzoate 5 SG @ 8.5 g a.i./ha and chlorantraniliprole 18.5 SC @ 25 g a.i./ha were most effective against the borer resulting in 11.19-24.74 per cent fruit infestation as compared to 34.11-52.25 per cent fruit infestation in control. The treatments resulted in higher fruit yield (114.40 and 112.44q/ha, respectively). The order of efficacy of the evaluated insecticides was emamectin benzoate > chlorantraniliprole > spinosad > cypermethrin > azadirachtin > neemastra followed by darekastra > brahmastra > cow urine followed by fermented butter milk. The incremental cost benefit ratio was highest in emamectin benzoate (1:12.34). Among biopesticides, azadirachtin provided comparatively better protection against the borer.Downloads
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