Comparative persistence of flubendiamide residues in chilli following application as individual and combination formulation

Main Article Content

Debi Sharma
Soudamini Mohapatra
Ashok Kumar Ahuja
Jyothi V. Divakar
M. Deepa

Keywords

chilli, des-iodo flubendiamide, flubendiamide, pesticide residues, thiacloprid

Abstract

Introduction Chilli, an important crop of India, is infested by various insect pests during its cultivation. A new insecticide flubendiamide is being registered in India individually as well as in combination with thiacloprid for use against lepidopteran and sucking pests of chilli. Objectives To study the dissipation pattern of flubendiamide following its application as flubendiamide alone and in combination with thiacloprid. Methods Standardized methodologies using high-performance liquid chromatography, were adopted to estimate residues of flubendiamide, its metabolite, des-iodo flubendiamide and thiacloprid in chilli. Results Average initial deposits of flubendiamide in chilli following its application as flubendiamide alone or as flubendiamide and thiacloprid combination were almost the same, i.e. 0.467 and 0.499 mg kg1, respectively, from treatment at\ recommended dose of 60 ga.i. ha1 , 0.824 and 0.992 mg kg1 from treatment at double the recommended dose. Residues dissipated to below detectable levels within 7–10 days, respectively. Des-iodo flubendiamide, a metabolite of flubendiamide was not detected in any of the chilli samples collected at different timeintervals. Residues of thiacloprid also dissipated quickly and were below quantifiable level of 0.01 mg kg1 at 7 and 10 days, respectively. Conclusion Flubendiamide residues behaved in almost identical manner when applied alone or in combination with thiacloprid.

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