ISHS Acta Horticulturae 713: VI International Peach Symposium
PROFILING PRESENCE AND CONCENTRATION OF EIGHTEEN PESTICIDE RESIDUES THROUGH A COMMERCIAL CANNING PROCESS |
| Authors: | S.F. Lennon, G.L. Reighard, P. Schermerhorn, L. Podhorniak, D. Horton |
| Keywords: | pesticide residues, clingstone peach, metabolite, tolerance, canning process |
| Abstract:
A two-year study was initiated in 2002 to profile the fate of eighteen pesticide residues through a commercial peach canning process. Of the 18 pesticides, ten were parent compounds and the remaining eight compounds were metabolites that the United States Environmental Protection Agency (U.S. EPA) identified as potential environmental or human concerns. The pesticides examined were azinphos-methyl, azinphos-methyl oxygen analog, phosmet, phosmet oxygen analog, chlorpyrifos, chlorpyrifos oxygen analog, propiconazole, fenbuconazole, RH-129, RH-130, triazole acetic acid (TAA), triazole alanine (TA), 1,2,4 triazole, captan, chlorothalonil, permethrin, esfenvalerate, and oxytetracycline (OTC). In 2002 and 2003, fruit samples of three late ripening peach cultivars (‘Ouachita Gold’, ‘Encore’, and ‘Faye Elberta’) were collected from three commercial growers. Four different sample points were taken through the canning process: the whole peach, half of the peach with the peel, half of the peach without the peel, and the canned peach. There was a significant difference (P=0.05) in residue concentrations (ppb) of the parent compounds between the whole peach, the half peach with peel, and the half peach without the peel samples. However, there were no significant difference in residue concentrations found between the half peach without the peel and the canned peach samples. The dissipation rate of metabolite residues varied from compound to compound. The residues from organophosphate metabolites followed the same dissipation trend as the parent compounds. However, the triazole metabolites TA and TAA dissipated much slower through the canning process, while 1,2,4 triazole was not detected in any of the samples. All samples analyzed in this study were below the U.S. EPA tolerances. | |
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