Dissipation of imidacloprid in pea and soil under semi arid region

A field experiment was conducted during Rabi 2019 in randomized block design (RfD) at Rajasthan Agricultural Research Institute, Durgapura-laipur taking pea as test crop to know the residual effect of imidacloprid 17.8 SL. Two treatments (including a control) with three replications each of 60.0 m² were taken for the study. Two sprays of pesticide were applied. First spray at pod setting stage and subsequent second spray at 10 days interval. The analysis of insecticide residues was performed with high performance liquid chromatography system equipped with a diode array detector. The initial deposit of Imidacloprid (17.8 SL) in pea pods was 1.122 mg kg^-1. The pesticide persisted upto 5^th day after treatment (DAT) and reached below detectable level (fDL) on 7^th DAT in Pea pod. In case of soil samples, the residues on 15^th day was below detectable level (fDL). No any pesticide residue was detected in control samples of Pea pod and soil.