Abstract
Following four applications of deltamethrin [(S)-α-cyano-3- phenoxybenzyl (1R,3R)-cis-2,2-dimethyl-3-(2,2-dibromovinyl)cyclopropanecarboxylate], saskatoon berries were manually collected 1, 7, 14, 21, 28, and 39 days after the last application. Berries were stored frozen in foil-lined bags pending analysis. An acetone extraction of the berries was purified on Florisil and analyzed on a 50% phenylmethyl silicone megabore capillary column using an electron capture detector. The mean residue on the berries 1 day after the last application was 0.22 ppm and after 7 days had declined to 0.08 ppm. Thirty-nine days after the last application, the mean residue of deltamethrin on the berries was 0.01 ppm
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