Dissipation and evaluation of different treatments on the residues of different insecticides in/on cauliflower curd

Abstract

A field study to understand dissipation rates and effect of various washing treatments on the residues of seven different insecticides, i.e. tetraniliprole 200 SC, emamectin benzoate 5 SG, lufenuron 5.4 EC, indoxacarb 14.5 SC, thiodicarb 75 WP, profenofos 50 EC and cypermethrin 25 EC in/on cauliflower curd has been conducted. The results showed that initial deposits (just after the last insecticide application, i.e. 0 d) of tetraniliprole, emamectin benzoate, lufenuron, indoxacarb, thiodicarb, profenofos and cypermethrin were 0.43, 0.03, 0.25, 0.28, 0.38, 6.70 and 0.68 mg kg⁻¹, respectively. The dissipation pattern of all the tested insecticides followed monophasic, first order kinetics with the half-lives of 6.25, 8.85, 3.27, 7.71, 4.36, 2.98 and 3.76 d, respectively. Proposed pre-harvest intervals for these insecticides are 6, 9, 3, 8, 4, 3 and 4 d, respectively. All the decontamination techniques showed reductions in residue levels. However, treatment by soaking in 5% sodium bicarbonate aqueous solution showed 54%, 42%, 53%, 48%, 22%, 54% and 77% maximum reductions in residues of tetraniliprole, emamectin benzoate, lufenuron, indoxacarb, profenofos and cypermethrin, respectively, in cauliflower curds. The next best treatment was soaking cauliflower curds in water at 45–50 °C for 10 min, which reduced the residues of cypermethrin, profenofos, tetraniliprole, thiodicarb, emamectin benzoate and lufenuron.

Keywords:

• Residues
• dissipation
• decontamination
• cauliflower
• insecticides

Acknowledgements

The authors acknowledge the Pesticide Residue Laboratory and Main Vegetable Research Station, Anand Agricultural University, Anand, Gujarat, India for providing laboratory as well as field facilities and technical support.

Author contributions

Anitha V. (performance of experiment), Ravi L. Kalasariya (conception and design of experiments, overall supervision), Suchi Chawla (writing manuscript, technical and editorial editing), Paresh H. Rathod (providing laboratory resources), Rajesh R. Acharya (providing field facilities and technical support).

Disclosure statement

Authors have no conflict of interest.

Disclosure statement of generative AI in scientific writing

Generative AI and AI-assisted tools were not used in scientific writing.

Data availability statement

All the data are available with the laboratory.