Persistence and dissipation of lambda cyhalothrin in/on mango (Mangifera indica)

Abstract

A study was conducted during 2004 to evaluate persistence of lambda cyhalothrin residues in mango (Mangifera indica L.) fruits. Repeated spray application of lambda cyhalothrin (Karate 5 EC, used for control of mango leaf hopper) at the recommended dose of 0.5 and double the recommended dose 1.0 ml/litre, resulted in the initial deposit of 0.86 and 1.6 mg/kg, respectively. The residues dissipated steadily and after 20 days of spraying 0.05 and 0.09 mg/kg were recovered from the fruit peel. In the fruit pulp maximum of 0.034 and 0.044 mg/kg lambda cyhalothrin was recovered after 5 days, following treatment at recommended and double the recommended dose, respectively. The residues in the peel remained up to 20 days and in the pulp 7 days. Lambda cyhalothrin residues in mango peel dissipated at the half-life of 4.8 days and the safe pre-harvest interval was 4 and 8 days taking the maximum residue limit value as 0.5 mg/kg.