| Abstract
| - Azoxystrobin, a fungicide of the strobilurin group, has an European Union maximum residue level(MRL) of 2 mg/kg for grapes. This work aimed to assess residues on fresh and washed grapes andon raisins following processing with (i) alkali treatment and sun drying and (ii) sun drying only.QUADRIS 25% SC was applied according to good agricultural practice for two consecutive years ona typical cv. Thomson seedless and a seed-producing clone. Samples were collected 0, 15, and 21days postapplication and analyzed using gas chromatography/electron capture detection; recoverieswere 86 ± 12% for grapes and 99 ± 15% for raisins. Residues on grapes were 0.49−1.84 mg/kg,and washing removed 75% of the residue. Residues in raisins produced from seedless grapes were0.51−1.49 (treatment 1) and 1.42−2.08 mg/kg (treatment 2), with residue transfer factors sometimes>1, even following alkali treatment, which reduced residues considerably. To avoid trade problems,a higher MRL for raisins is necessary. Keywords: Azoxystrobin; residues; grapes; raisins; processing
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