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 |
The present study was conducted in the Bio-control laboratory, BCKV located at Mohanpur, Nadia, West Bengal, India to study the toxic effect of some modern insecticides namely cypermethrin 25% EC @ 0.01% a.i., wettable Sulphur 80 WP @ 0.24% a.i., profenofos 50% EC @ 0.05% a.i., in rynaxypyr 20% SC @ 0.006% a.i., spiromesifen 240 SC @ 0.024% a.i. and imidacloprid 17.8% SL @ 0.005% a.i., neemazal 1% EC @ 0.002% a.i. to the pupae of Trichogramma chilonis Ishii (Trichogrammatidae: Hymenoptera) and adults of Bracon brevicornis Wesmael (Braconidae; Hymenoptera).The results showed that Cypermethrin was found to be the most toxic insecticide (65.52% mortality) to the pupae of T. chilonis followed by wettable sulphur (42.7% mortality) and profenofos (37.08%mortality). Toxicity of rynaxypyr, imidacloprid and spiromesifen showed low level of toxicity (27.59%, 25.84% and 26.97% mortality respectively). Neemazal 1% EC was the safest (7.87% mortality). In case of Bracon brevicornis adults, both cypermethrin (0.01% a.i.) and wettable sulphur (0.24% a.i.) were highly toxic (70.35% and 62.84% mortality respectively). Profenofos showed moderate level of toxicity whereas toxicity recorded in imidacloprid, spiromesifen and rynaxypyr was low (32.43%, 32.43% and 35.81% mortality respectively). Neemazal (0.002% a.i) was found to be the safest (20.08% mortality).
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