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Dissipation behavior and risk assessment of acephate in brinjal using GLC with FPD

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Abstract

A study was conducted to observe the persistence, dissipation behavior, and risk assessment of acephate on brinjal fruit. Brinjal crop was sprayed with acephate 75 SP at 560 and 1120 g a.i. ha−1 at fruiting stage followed by another application at 10-day interval. After sampling, the samples were extracted and cleaned up using quick, easy, cheap, effective, rugged, and safe (QuEChERS) technique, and the residues of acephate were analyzed with gas chromatography using flame photometric detector (FPD). The average initial deposits of acephate on brinjal fruits were found to be 2.54 and 4.07 mg kg−1 following application of insecticide at 560 and 1120 g a.i. ha−1, respectively. Residues of acephate reached below determination level of 0.10 mg kg−1 after 7 days at recommended dosages and after 10 days at double the recommended dosages. The half-life of acephate was found to be 1.55 and 1.52 days, respectively, at 560 and 1120 g a.i. ha−1. For risk assessment studies, theoretical maximum residue contributions (TMRC) were calculated and compared with maximum permissible intake (MPI). It was observed that TMRC values reached below MPI in 0-day samples at both recommended and double the recommended dosages. Therefore, it was concluded that if waiting period of 1 day is observed, there will be much reduced risk to consumers and the insecticide could be safely used for the protection of brinjal crop from insect pests.

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Acknowledgments

Authors are thankful to the Professor and Head, Department of Entomology, PAU, Ludhiana for providing necessary research facilities to carry out these studies.

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Authors and Affiliations

  1. Pesticide Residue Analysis Laboratory, Department of Entomology, Punjab Agricultural University, Ludhiana, 141004, Punjab, India

    Ramandeep Kaur, Sarabjit Kaur, Kousik Mandal & Balwinder Singh

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  1. Ramandeep Kaur
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  2. Sarabjit Kaur
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  3. Kousik Mandal
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  4. Balwinder Singh
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Correspondence to Kousik Mandal.

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Kaur, R., Kaur, S., Mandal, K. et al. Dissipation behavior and risk assessment of acephate in brinjal using GLC with FPD. Environ Monit Assess 187, 36 (2015). https://doi.org/10.1007/s10661-015-4279-y

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  • DOI: https://doi.org/10.1007/s10661-015-4279-y

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