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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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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 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(8): 277-289
DOI: https://doi.org/10.20546/ijcmas.2019.808.033


Impact of Repeated Application of Synthetic Insecticides on Thrips and their Natural Enemies of Bt Cotton
V. Binu* and B.V. Bhede
Agril. Entomology, College of Agriculture, VNMKV, Parbhani-431402, Maharashtra, India
*Corresponding author
Abstract:

In order to study the effects of repeated use of various insecticides on thrips and their natural enemies viz., Ladybird beetle and Predatory spiders, an experiment was conducted during Kharif, 2018-19at the Experimental farm, Department of Agricultural Entomology, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani. The insecticides selected included those used commonly among the farmers viz., Imidacloprid 17.8% SL, Fipronil 5% SC, Lambda cyhalothrin 5% EC, Spinosad 45% SC, Acephate 75% SP, Buprofezin 25% SC, Flonicamid 50% WG, Acetamiprid 20% SP, Profenofos 50% EC, Diafenthiuron 50%WP, Acephate 50% + Imidacloprid 1.8% SP, Pyriproxyfen 5% + Fenpropathrin 15% EC and Profenofos 40% + Cypermethrin 4% EC.From the first spraying onwards, Flonicamid 50% WG was found to be the best in reducing the thrips population steadily up to 0.50/leaf in second spraying. But, a sudden increase in population mean was found in the third (6.80/leaf) and fourth spraying (11.50). Same trend was followed in Fipronil 5% SC, Buprofezin 25% SC and Diafenthiuron 50% WP. The effect of repeated applications of synthetic insecticides on the natural enemies depicted that Spinosad 45% SC, Flonicamid 50% WG and Buprofezin 25% SC were the safest insecticides, showing maximum natural enemies population. Imidacloprid 17.8% SL, Fipronil 5% SC and Lambda cyhalothrin 5% EC recorded minimum natural enemies population marking its intense toxicity against them.


Keywords: Cotton thrips, Natural enemies, Flonicamid, Spinosad, Bt cotton
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How to cite this article:

Binu, V. and and Bhede,B.V. 2019. Impact of Repeated Application of Synthetic Insecticides on Thrips and their Natural Enemies of Bt Cotton.Int.J.Curr.Microbiol.App.Sci. 8(8): 277-289. doi: https://doi.org/10.20546/ijcmas.2019.808.033