National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
An investigation was undertaken to study the bio-efficacy, persistence and residual toxicity of different insecticides viz., chlorantraniliprole 0.004 per cent, ethion 0.100 per cent, triazophos 0.050 per cent, indoxacarb 0.010 per cent, emamectin benzoate 0.001 per cent, quinalphos 0.050 per cent and profenophos 0.100 per cent against A. modicella infesting soybean at the Research Farm of Department of Agril. Entomology, College of Agriculture, Latur (MS). The results proved that all the insecticidal treatments were significantly superior over untreated control in minimizing A. modicella infestation on soybean. Among the treatments, chlorantraniliprole 0.004 per cent was exhibited to be the most effective insecticide in minimizing population of A. modicella on soybean (2.11 larvae per mrl) followed by emamectin benzoate 0.001 per cent (2.67 larvae per mrl), indoxacarb 0.010 per cent (2.89 larvae per mrl), quinalphos 0.050 per cent (3.33 larvae per mrl), profenophos 0.100 per cent (3.34 larvae per mrl), ethion 0.100 per cent (4.00 larvae per mrl) and triazophos 0.050 per cent (4.22 larvae per mrl) after application of insecticides. The highest grain yield was registered by chlorantraniliprole 0.004 per cent (34.87 q per ha) while quinalphos 0.050 per cent (1:19.72) recorded highest incremental cost benefit ratio. The results on residual toxicity of different insecticides against A. modicella infesting soybean indicated that chlorantraniliprole 0.004 per cent and emamectin benzoate 0.001 per cent illustrated highest persistent toxicity index (PT) (915.46 and 870.24, respectively) and LT50 values (7.78 and 6.89, respectively) against A. modicella after spray as compared to the other insecticides.
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