EFFICACY AND DISSIPATION OF SELECTIVE INSECTICIDES ON GHERKIN
KrishiKosh
View Archive InfoField | Value | |
Title |
EFFICACY AND DISSIPATION OF SELECTIVE INSECTICIDES ON GHERKIN
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Creator |
JYOTHSNA, MENCHU
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Contributor |
JAGDISHWAR REDDY, D
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Subject |
insecticides, allelochemicals, fruits, vegetables, pesticides, concentrates, minerals, land resources, sampling, cabbages
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Description |
Field experiment was carried out during Rabi, 2010-11 at Student’s Farm, College of Agriculture, Rajendranagar, Hyderabad wherein the efficacy of nine insecticides viz., flubendiamide 480 SC at 60 g a.i. ha-1, thiacloprid 240 SC at 120 g a.i. ha-1, flubendiamide 480 SC + thiacloprid 240 SC at 48 + 48 g a.i. ha-1, lambdacyhalothrin 5 SC at 18.75 g a.i. ha-1, indoxacarb 14.5 SC at 21.75 g a.i. ha-1, thiamethoxam 25 WG at 31.25 g a.i. ha-1, lambdacyhalothrin 5 SC + thiamethoxam 25 WG at 15.625 + 31.25 g a.i. ha-1, triazophos 40 EC at 500 g a.i. ha-1 and azadirachtin 0.15 EC at 1500 ppm was evaluated against pumpkin caterpillar, Diaphania indica Saunders, serpentine leaf miner, Liriomyza trifolii Burgess, cotton aphid, Aphis gossypii Glover and cowpea aphid, Aphis craccivora Koch on gherkin. The dissipation pattern of three effective treatments viz., flubendiamide 480 SC at 60 g a.i. ha-1, thiacloprid 240 SC at 120 g a.i. ha-1 and flubendiamide 480 SC + thiacloprid 240 SC at 48 + 48 g a.i. ha-1 was studied by collecting gherkin fruits at 0, 1, 3, 5, 7, 10 and 15 days after third spray at AINP on Pesticide Residues, College of Agriculture, Rajendranagar, Hyderabad. Among all the chemicals, flubendiamide (60 g a.i. ha-1) was found to be the most effective one with a maximum reduction in D. indica population (65.50%), followed by flubendiamide + thiacloprid at 48 + 48 g a.i. ha-1 (62.12%) and lambdacyhalothrin at 18.75 g a.i. ha-1 (59.22%). Thiacloprid (120 g a.i. ha-1) was found to be most effective treatment in reducing L. trifolii (74.96%), followed by flubendiamide + thiacloprid at 48 + 48 g a.i. ha-1 (71.57%) and flubendiamide at 60 g a.i. ha-1 (61.92%). The reduction of A. gossypii population was more with thiacloprid at 120 g a.i. ha-1 (86.34%), flubendiamide + thiacloprid at 48 + 48 g a.i. ha-1 (74.36%) and thiamethoxam at 31.25 g a.i. ha-1 (61.09%). Thiacloprid (120 g a.i. ha-1), flubendiamide + thiacloprid at 48 + 48 g a.i. ha-1 and lambdacyhalothrin + thiamethoxam at 15.625 + 31.25 g a.i. ha-1 were highly effective in controlling A. craccivora population to 72.25, 71.35 and 62.61 per cent, respectively. The residues recorded for flubendiamide at 60 g a.i. ha-1 were found to be 1.35, 0.86, 0.40, 0.16, 0.01 mg kg-1 and BDL at 0, 1, 3, 5, 7 and 10 days after third spray respectively. The half life value (RL50) and waiting period (Ttol) were 1.65 and 5.13 days, respectively. Thiacloprid at 120 g a.i. ha-1 recorded residues of 1.49, 1.09, 0.43, 0.08, 0.01 mg kg-1 and BDL after 0, 1, 3, 5, 7 and 10 days after third spray respectively. The half life value was worked out to be 1.4 days and the waiting period was 3.69 days. In the combination product flubendiamide + thiacloprid at 48 + 48 g a.i. ha-1, residues recorded for flubendiamide at 48 g a.i. ha-1 were 0.92, 0.62, 0.28, 0.05 and BDL at 0, 1, 3, 5 and 7 days after last spray respectively. The half-life of flubendiamide (48 g a.i. ha-1) was worked out to be 1.78 days with waiting period of 4.13 days. In the combination product flubendiamide + thiacloprid at 48 + 48 g a.i. ha-1, thiacloprid at 48 g a.i. ha-1 after three sprays left the initial deposit of 0.81 mg kg-1. The residues degraded to an extent of 0.46, 0.12 and 0.02 mg kg-1 and BDL at 1, 3, 5 and 7 days, respectively. The half life value and waiting period were 1.96 and 1.15 days, respectively. |
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Date |
2016-06-07T15:02:02Z
2016-06-07T15:02:02Z 2011 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/66969
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Language |
en
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Relation |
D8854;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY
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