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EFFICACY AND DISSIPATION OF SELECTIVE INSECTICIDES ON GHERKIN

KrishiKosh

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Title EFFICACY AND DISSIPATION OF SELECTIVE INSECTICIDES ON GHERKIN
 
Creator JYOTHSNA, MENCHU
 
Contributor JAGDISHWAR REDDY, D
 
Subject insecticides, allelochemicals, fruits, vegetables, pesticides, concentrates, minerals, land resources, sampling, cabbages
GHERKIN
 
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.
 
Date 2016-06-07T15:02:02Z
2016-06-07T15:02:02Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/66969
 
Language en
 
Relation D8854;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY