Dissipation kinetics and risk assessment of chlorfenapyr on tomato and cabbage

Environmental Monitoring and Assessment
Sandip PatraArunava Samanta

Abstract

A field experiment was conducted over two seasons to evaluate the dissipation kinetics and assess the risks of chlorfenapyr in tomato and cabbage following foliar application of chlorfenapyr 10% SC at 100 and 200 g a.i. ha-1. Samples of tomato, cabbage, and soil were analyzed and quantified by gas chromatography-electron capture detector (GC-ECD). The limit of detection (LOD) and limit of quantification (LOQ) of chlorfenapyr were found to be 0.01 and 0.03 mg kg-1, respectively, in tomato, cabbage, and soil. The dissipation of chlorfenapyr followed first-order kinetics. The compound showed less persistence in both the vegetables and soil as the calculated half-life values of chlorfenapyr ranged between 4.54 and 7.74 days considering two different doses and seasons. The residue was below detection limit in all the untreated plant and soil samples. The pre-harvest interval (PHI) of chlorfenapyr in both the vegetables was determined to be 9-14 days regardless of dose or season. The theoretical maximum residue contribution (TMRC) of chlorfenapyr was calculated for tomato and cabbage and was found to be lower than the maximum permissible intake (MPI) of the compound. Therefore, the application of chlorfenapyr at the recommended dose ...Continue Reading

References

Oct 18, 2005·The Science of the Total Environment·Yongsong CaoYitong Lu
Jan 16, 2007·Bulletin of Environmental Contamination and Toxicology·X-M OuD Fan
Apr 23, 2010·Bulletin of Environmental Contamination and Toxicology·Papia DityaAnjan Bhattacharyya

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Citations

Aug 28, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Aleksandra LeskaAnna Górczyńska

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