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Field bioefficacy, phytotoxicity and residue dynamics of the insecticide flonicamid (50 WG) in okra [Abelmoschus esculentus (L) Moench]

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Title Field bioefficacy, phytotoxicity and residue dynamics of the insecticide flonicamid (50 WG) in okra [Abelmoschus esculentus (L) Moench]
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Creator M. H. Kodandaram
Yengkhom Bijen Kumar
Kaushik Banerjee
Sandip Hingmire
 
Subject leafhoppers, bioefficacy, phytotoxicity
 
Description Not Available
In India, sucking pests including leafhoppers (Amrasca biguttula biguttula Ishida) and whitefly (Bemisia tabaci Gennadius) cause considerable economic damage to okra cultivation. This study reports the results of field experiments evaluating the bioefficacy, phytotoxicity, and residue dynamics of sprays of flonicamid 50 WG in okra (Abelmoschus esculenta (L.) Moench) crops. Of three doses (50, 75, 100 g a.i ha−1) tested, applications at 75 g a.i ha−1 were equally effective in controlling both leafhoppers and whiteflies with a higher marketable fruit yield of okra under open field conditions. Flonicamid also reduced population of the pest by >85% when compared to untreated controls after three rounds of foliar application at an interval of 10 days. Applications of flonicamid 50 WG did not cause any phytotoxic symptoms. It was also safe to the natural enemies (spiders and rove beetles) prevailing in the okra ecosystem. Initial deposits of flonicamid in okra fruits when applied at the rate of 75 and 150 g a.i. ha−1 were dissipated with half-lives of 3.0 and 3.5 days. Recommendable pre-harvest intervals (PHI) are 16 and 20 days, respectively. The dietary exposure of the measured residues was lower than the maximum permissible intake (MPI) of 0.576 mg person−1 day−1 on all the sampling days at both the doses. These findings are useful in deciding the spray schedule of flonicamid for effective management of sucking pests in okra crop assuring food safety.
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Date 2020-06-04T09:10:57Z
2020-06-04T09:10:57Z
2017-04-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/36846
 
Language English
 
Relation Not Available;
 
Publisher Not Available