STUDIES ON THE ABSORPTION, RESIDUES AND METABOLISM OF CYROMAZINE IN TOMATOES

The residues and metabolism of radio-labeled cyromazine (N-cyclopropyl -1,3,5-triazine-2,4,6-triamine) formulated as a 750 g kg(-1) WP ('Trig ard' 75WP)(R) was studied in greenhouse tomatoes. Residues of cyromazi ne and its metabolites were remarkably persistent, with only a slight loss occurring within a 30-day period. Findings with tomatoes were sim ilar to those with glass plates when exposed to cyromazine. Little vol atilization occurred from either tomato or glass surfaces kept under g reenhouse conditions. The only metabolite identified was melamine on b oth glass plates and tomatoes. Two other metabolites were found but we re not identified.