Level and Fate of Etoxazole in Green Bean (Phaseolus vulgaris)

The objective of this study was to estimate the total etoxazole residues balance (residue in pods, leaves and soil under the treated plant) in green bean and for identification of the degradative metabolites of etoxazole in soil under the treated plant. The results showed half life (t(1/2)) values of 3.13, 2.73 and 2.11 days for etoxazole in green bean pods, leaves and soil, respectively. According to the maximum residue limits (MRL) the pre harvest intervals (PHI) of etoxazole on green bean pods was 4-days after the treatment. The results of GC-Ms analysis of soil extracts under the treated plant showed that, at zero time unchanged etoxazole was found. The proportion of etoxazole in soil extracts detected decreased with the time. GC-Ms analysis of soil extracts show the presence of compound having the formula of C(14)H(23)NO(2) which was suggested to be 2-amino-2(4-tert-butyl-2-ethoxyphenyl) ethanol. The other founded compound has the formula C(13)H(18)O(3) and suggested to be 4-tert-butyl-2-ethoxybenzoic acid.