TERMINAL RESIDUES OF METOLACHLOR IN GROUNDNUT (ARACHIS-HYPOGAEA), SOYBEAN (GLYCINE-MAX) AND ONION (ALLIUM-CEPA)

An experiment was conducted during January 1987-November 1990 to study the terminal residues of metolachlor applied as a pre-emergence herbi cide in groundnut (Arachis hypogaea L), soybean [Glycine max (L.) Merr .] and onion (Allium cepa L). The edible parts of groundnut and soybea n and soil did not contain any detectable residues of metolachlor (<0. 01 ppm) when applied @ 1 and 2 kg al/ha, whereas onion bulbs contained traces of residues in 2 seasons (September-November 1989 and December -March 1990).