BIO-EFFICACY OF SOME INSECTICIDES AGAINST GREENHOUSE WHITEFLY Trialeurodes vaporariorum (Westwood) ON TOMATO
KrishiKosh
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Title |
BIO-EFFICACY OF SOME INSECTICIDES AGAINST GREENHOUSE WHITEFLY Trialeurodes vaporariorum (Westwood) ON TOMATO
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Creator |
ARVIND, KUMAR
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Contributor |
CHANDEL, RPS
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Subject |
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tomatoes,whitefly Trialeurodes vaporariorum (Westwood), insecticides,Bio-efficacy --- |
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Description |
ABSTRACT The present investigations entitled “Bio-efficacy of some insecticides against greenhouse whitefly Trialeurodes vaporariorum (Westwood) on tomato” was carried out during 2010-2012 in the Department of Entomology, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan (HP). Laboratory experiments were carried out to study the efficacy of six insecticides namely oxy-demeton methyl, spiromesifen, cyantraniliprole, chlorfenapyr, buprofezin and diafenthiuron and two botanicals azadirachtin (Neem Baan 1500 ppm) and dharek extract against first instar nymphs of the greenhouse whitefly, T. vaporariorum. Among chemical insecticides, spiromesifen had the maximum efficacy against the test insect with LC50 value of 2.72 ppm followed by cyantraniliprole (9.80 ppm), diafenthiuron (18.91 ppm), chlorfenapyr (22.63 ppm), buprofezin (31.45 ppm) and oxy-demeton methyl (206.99 ppm). The LC90 values were 13.48, 47.79, 68.41, 85.60, 168.65, and 1148.15 ppm for spiromesifen, cyantraniliprole, chlorfenapyr, diafenthiuron, buprofezin, and oxy-demeton methyl, respectively. Bio-pesticides, azadirachtin (Neem Baan) and dharek extract resulted in dosage-dependent mortality with LC50 and LC90 values of 4.45 and 27.58 ppm and 2.84 and 8.60 per cent respectively. The field efficacy of six insecticides and two botanicals revealed that cyantraniliprole (0.01%) was most effective in controlling T. vaporariorum followed by chlorofenapyr (0.022%) whereas, spiromesifen (0.0015%) and azadirachtin (0.00045%) were observed least effective. The study on repellency of botanicals revealed that dharek extract at 7 per cent gave highest repellency of crawlers of the whitefly |
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Date |
2017-01-04T11:00:38Z
2017-01-04T11:00:38Z 2013 |
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Type |
Thesis
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Identifier |
47852
http://krishikosh.egranth.ac.in/handle/1/94324 |
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Language |
en
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Format |
application/pdf
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