Journal Article

Residue determination of β-cyfluthrin and imidacloprid as mix formulation in/on chickpea (Cicer arietinum) pods and soil and its risk assessment

Suchi Chawla, Paresh G Shah, Anil R Patel, Hemlatta K Patel, Kiran M Vaghela and Priti P Solanki

in Food Quality and Safety

Volume 2, issue 2, pages 75-81
ISSN: 2399-1399
Published online March 2018 | e-ISSN: 2399-1402 | DOI: https://dx.doi.org/10.1093/fqsafe/fyy007

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  • Physical Chemistry
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  • Biological Engineering
  • Biological Sciences
  • Agricultural, Environmental, and Natural Resource Economics

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Abstract

OBJECTIVES

A field experiment was conducted at Agricultural Research Station for irrigated crops at Thasara, Anand Agricultural University, Anand, to study the dissipation and risk assessment of β-cyfluthrin and imidacloprid as combination product in/on chickpea.

MATERIALS AND METHODS

Solomon 300 OD comprising 9 per cent β-cyfluthrin and 21 per cent imidacloprid was foliar sprayed at the doses of 18 + 42g a.i. ha−1 (standard dose) and 36 + 84g a.i. ha−1 (double dose). Totally three sprays were made at an interval of 1 week starting from fruiting stage.

RESULTS AND DISCUSSIONS

The residues of β-cyfluthrin estimated using gas chromatograph with electron capture detector (GC-ECD) showed an initial deposit of 0.16 and 0.27 μg g−1 in standard and double doses, respectively. The residues for corresponding doses persisted till 7th and 10th day after application and reached below determination level of 0.01μg g−1 on the 10th and 15th day, respectively. Imidacloprid was estimated using high performance liquid chromatography (HPLC) and showed initial deposits of 1.22 and 2.7 μg g−1 in standard and double doses, respectively. Its levels reached below the determination level (0.01 μg g−1) on the 15th day in green pods. Statistical analysis of dissipation kinetics showed that β-cyfluthrin followed zero-order kinetics in standard dose with half-life of 7.27 days. In double dose, the dissipation kinetics followed first-order kinetics with half-life of 9 days. Imidacloprid followed first-order kinetics in both the doses with half-life of 6.7 and 7.7 days.

CONCLUSIONS

A pre-harvest interval (PHI) of 15 days is suggested. Theoretical risk assessment calculated as hazard quotient was less than 1, rendering the use of combination product as safe-provided proper PHI is followed.

Keywords: chickpea; β-cyfluthrin; imidacloprid; dissipation; dissipation kinetics; residue; risk assessment; pods

Journal Article.  4893 words.  Illustrated.

Subjects: Physical Chemistry ; Agriculture and Farming ; Biological Engineering ; Biological Sciences ; Agricultural, Environmental, and Natural Resource Economics

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