Determination of residues of lambda cyhalothrin in Alphonso mango by HPLC

Abstract

Residues of lambda cyhalothrin, a pyrethroid insecticide has been determined in Alphonso mango by high -performance liquid chromatography (HPLC). Lambda cyhalothrin was sprayed at recommended (6 ml/10 lit) and double recommended (12 ml/10 lit) doses on Mango trees. Mangoes harvested at 1, 5, 10, 15 and 25 days after spraying revealed that recommended dose showed residue of 0.84 ppm which was reduced to 0.48, 0.21 and 0.04 ppm on 5, 10 and 15 days after spray, respectively. Mangoes of double than recommended dose showed residue of 1.40 ppm which was reduced to 0.95, 0.53 and 0.10 ppm on 5,10 and 15 days respectively after spraying. On 25th day the residue of lambda cyhalothrin was below detectable level in the both doses.