Invasive Species Compendium

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Abstract

Dissipation of dimethoate, methyl demeton and fenthion in mango fruits.

Abstract

In connection with the use of insecticides against Amritodus spp. and Sternochetus mangiferae (F.) in Tamil Nadu, India, on mango fruits that had been treated with 0.06% dimethoate, 0.05% demeton-S-methyl (Metasystox) and 0.05% fenthion using a high-volume sprayer were tested for chemical residues. The initial deposits (in p.p.m.) and (in brackets) half-lives (in days) were 1.24 (2.6), 1.18 (3.0) and 0.99 (3.1) for the 3 compounds, respectively. Safe waiting periods of 3, 3 and 5 days, respectively, are suggested for unripe fruit. When the fruits were kept for ripening, the residues fell below the recommended tolerance limits for other fruits.