Dissipation kinetics and risk assessment of chlorantraniliprole andlambda-cyhalothrin in okra (Abelmoschus esculentus) and soil

CHETNA KHOKHAR; SUSHIL  AHLAWAT; REENA CHAUHAN; SURENDER SINGH YADAV; NISHA KUMARI

doi:10.56093/ijas.v96i5.174675

Authors

CHETNA KHOKHAR Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana 125 004, India
SUSHIL AHLAWAT Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana 125 004, India
REENA CHAUHAN Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana 125 004, India
SURENDER SINGH YADAV Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana 125 004, India
NISHA KUMARI Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana 125 004, India

https://doi.org/10.56093/ijas.v96i5.174675

Keywords:

Dietry risk assessment, Environment, QuEChERS, Residue dynamics

Abstract

A field experiment was conducted to elucidate the dissipation kinetics, persistence, and risk assessment of chlorantraniliprole and lambda-cyhalothrin applied as ready-mix insecticide in okra [Abelmoschus esculentus (L.) Moench] and associated soil in April 2023 at Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana. A mix formulation of chlorantraniliprole (9.3%) + lambda-cyhalothrin (4.6%) was applied at the fruiting stage of okra (Hisar 102 variety) in different doses (28, 35 and 56 g a.i./ha). The samples were analysed using a validated QuEChERS extraction protocol followed by GC-MS/MS quantification. Both insecticides confirmed to
first-order dissipation kinetics, with half-lives of 1.40–4.36 days in okra fruits. Residues declined below the MRL within six days after application, establishing safe pre-harvest intervals. Dietary and soil risk assessments, based on estimated daily intake and risk quotient indicated negligible human and ecological risk. These findings provide critical data for residue management, regulatory compliance, and suitability of chlorantraniliprole and lambda-cyhalothrin in okra cultivation.

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