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 |
A laboratory experiment was carried out to evaluate the bio-efficacy of selected new generation insecticides viz., Pymetrozine 50% WG, Flonicamid 50% WG, Dinotefuran 20% SG, Thiamethoxam 25% WG,Azadirachtin 1% EC,Buprofezin 25% SC and Profenophos 50% EC against cotton mealybug, Phenacoccus solenopsis Tinsley by adopting normal bioassay techniques. A preliminary trial with three different dosages (below recommended, recommended and above recommended) were tried for each of the insecticidal treatments. The mortality of mealybugs was found to be more in the treatment with recommended dosage when compared to below recommended dose. Out of the seven insecticides screened against P. solenopsis under laboratory conditions, neonicotinoids such as thiamethoxam 25% WG @ 0.40 g/l and dinotefuran 20% SG @ 0.25 g/l were found to be most effective in reducing the mealybug population at recommended and above recommended doses. Thiamethoxam and dinotefuran recorded the highest mortality of mealybugs (97.78 and 90.56 %, respectively) after imposition of treatments across different durations of exposure.
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