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.
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