Add time:08/19/2019         Source:sciencedirect.com

Residue levels of azoxystrobin, ACRINATHRIN (cas 101007-06-1) and kresoxim methyl were determined in zucchini grown in an experimental greenhouse during a two weeks period in which repeated treatments with the three pesticides were applied. Analysis was carried out by using ethyl acetate extraction and gas chromatography with electron capture detection (GC-ECD). The maximum values of residues determined in the plantation were 1.87  mg/kg for azoxystrobin, 0.25  mg/kg for acrinathrin and 0.20  mg/kg for kresoxim methyl. The application of three different household processing (washing, peeling and cooking) and the study of “unit to unit” variability of these pesticides in zucchini were also carried out. The washing processing factors resulted to be 0.3, 0.2 and 0.0 for acrinathrin, azoxystrobin and kresoxim methyl, respectively; whereas the peeling processing factors ranged between 0.0 and 0.1. The cooking processing factors were 0.9 for acrinathrin, 1.1 for kresoxim methyl and 1.4 for azoxystrobin, the average loss of water in the zucchini samples during the cooking process being 36 %. The “unit to unit” variability factors were also determined on six different samples containing ten unprocessed fruits (units) each sample. In all cases, the “unit to unit” variability factors obtained for the three pesticides ranged between 1.3 and 2.4.

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