Title: Risk assessment and persistence evaluation of Spiromesifen 240 SC on cucumber in India

Authors: Tirthankar Banerjee; Manoj Kumar Agyani

Addresses: AINP on Pesticide Residues, Department of Agricultural Chemicals, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, 741252, West Bengal, India; Division of Agricultural Chemicals, ICAR – Indian Agricultural Research Institute, New Delhi 110012, India ' AINP on Pesticide Residues, Department of Agricultural Chemicals, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, 741252, West Bengal, India

Abstract: Spiromesifen 240 SC was applied @ 144 g a.i./ha (T1) and 288 g a.i./ha (T2) on cucumber twice in ten days interval under randomised block designed field experiment. Cucumber fruit samples were collected at different day's interval, subjected to extraction and clean-up by modified QuEChERS technique and residue of spiromesifen was quantified by GC-ECD. Initial deposits of spiromesifen in cucumber fruit were 0.43 and 0.80 mg/kg for T1 and T2, respectively. No residue detected in harvest samples above LOQ. Half-life (t_1/2) of spiromesifen were calculated 2.12 and 2.19 days and safe waiting period (T_MRL) were determined 5.83 and 8.11 days for T1 and T2, respectively. TMRC was much lesser than MPI even though initial deposit was considered. The % ADI values were 8.82% and 16.52% at highest residual deposits on 0 day for single and double dose respectively indicates safety for human consumption.

Keywords: spiromesifen; cucumber; residue; half-life; pre-harvest interval; PHI; safety.

DOI: 10.1504/IJPTI.2019.104175

International Journal of Postharvest Technology and Innovation, 2019 Vol.6 No.1, pp.11 - 25

Accepted: 07 Jun 2019
Published online: 20 Dec 2019 *

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