Abstract
In a 3-yr study, residues of glyphosate and its major metabolite aminomethylphosphonic acid (AMPA) were determined, using high-pressure liquid chromatography with post-column reaction and fluorescence detection, in strawberry fruit following spot and wiper applications of glyphosate to established strawberries. Residues in the fruit were not significantly different for the wiper and spot treatments. Maximum residues of glyphosate detected for either treatment were of the order of 0.04 mg kg−1; residues of AMPA were non-detectable in all samples. Recoveries of glyphosate and AMPA from fortified strawberry fruit tissue were 76 ± 8% and 79 ± 13%, respectively, at 0.1 mg kg−1.Key words: Glyphosate, AMPA, strawberry, wiper application, spot application, residues, HPLC
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