Dissipation Behaviour of Spinosad Insecticide in Chilli and Soil

Article type: Research Article

Authors: Sharma, Anjali | Srivastava, Anjana | Ram, Bali | Srivastava, P.C.

Affiliations: Department of Chemistry, Pantnagar-263145 Uttarakhand, India | Department of Soil Science G.B. Pant University of Agriculture and Technology, Pantnagar-263145 Uttarakhand, India

Note: [] Corresponding author. E-mail: [email protected]

Abstract: The persistence of Spinosad insecticide in chilli fruits was evaluated at two application rates (73.0 g a.i./ha and 146.0 g a.i./ha) by high performance liquid chromatography. The dissipation of the insecticide from chilli fruits appeared to occur in two phases. Each phase followed first-order kinetics. Half life values of Spinosad for the first and second phase on green chilli were found to be 1.48 d and 0.70 d respectively for 73.0 g a.i./ha application rate, and 6.72 d and 5.55 d respectively for 146.0 g a.i./ha application rate. No detectable residues (<0.05 μg/g) were found in red chilli and soil, sampled on the 15th day of application which depicts that spinosad is environmentally safe as regards soil pollution.

Keywords: Spinosad, persistence, dissipation, chilli, biphasic, hplc, soil pollution

Journal: Asian Journal of Water, Environment and Pollution, vol. 5, no. 2, pp. 49-52, 2008