Dissipation of Chlorantraniliprole, Fipronil and Deltamethrin Residues on Cabbage and Soil

Abstract

Abstract The dissipation nature of chlorantraniliprole, fipronil and deltamethrin residues was studied on cabbage and soil. The insecticides such as chlorantraniliprole fipronil and deltamethrin, residues were sprayed as foliar application twice at an interval of 7 days with the recommended doses of deltamethrin (12.5 g a.i./ha), chlorantraniliprole (10 g a.i./ha) and fipronil (50 g a.i./ha). The samples were taken randomly before the application of insecticides and 1 hour after the second spray of insecticides. The repeatability and reproducibility of the residue analysis method of cabbage were found to be 0.30 to 4.50% and 1.84 to 2.39% respectively for all the insecticides whereas that of soil samples ranged from 0.54 to 3.84% and 1.56 to 2.87% respectively for repeatability and reproducibility. The residues were below the detectable limit for all the insecticides at harvest time. The residues of fipronil were found to be more persistent than those of chlorantraniliprole and deltamethrin. Fipronil was found to persist up to the 7th day with a residue of 0.01 mg kg− 1. However, the residues of chlorantraniliprole and deltamethrin persisted upto the 5th day i.e. 0.11 mg kg− 1 and 0.03 mg kg− 1 respectively. Observation revealed that the residues of chlorantraniliprole on the cabbage head dissipated over the course of time and an equally high degree of dissipation was observed. The residues of fipronil were also found to be persistent in soil upto 7th day (0.01 mg kg− 1) as compared to chlorantraniliprole and deltamethrin residues.