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 Relative toxicity of methyl-o-demeton, spinosad, acetamiprid, chlorfenapyr and fipronil were evaluated against mustard aphid, Lipaphis erysimi (Kalt.) on Gobhi sarson var. DGS-1 during 2017-18. The LC50 values of insecticides viz., methyl-o-demeton, spinosad, acetamiprid, chlorfenapyr and fipronil were 4.772, 55.406, 4.657, 5.554 and 15.107 ppm, respectively by direct spray method indicating that acetamiprid exhibited greater toxicity among the tested insecticides. However, by leaf dip method, the LC50 values of insecticides were 6.034, 9.142, 6.487, 5.429 and 67.505 ppm, respectively, which indicated that chlorfenapyr, was the most toxic among the insecticides tested. The relative toxicity of acetamiprid, methyl-o-demeton, chlorfenapyr and fipronil over spinosad were found to be 11.89, 11.61, 9.97 and 3.66 times more effective, respectively. Whereas, in leaf dip method of bioassay the relative toxicity of chlorfenapyr, methyl-o-demeton, acetamiprid and spinosad over fipronil were found to be 12.43 11.18, 10.40 and 7.38 times more effective, respectively.
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