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1000倍40%水胺硫磷在金冠苹果树施用后,果皮中残留于第39d 可降至0.15ppm 以下,果肉需2d。果实三部位残留降至相同浓度所需时间长短为;果皮>果肉>果心。喷药后果实不同部位的残留含量顺序也为:果皮>果肉>果心,果皮残留是限制果实是否符合安全限量的关健因子。喷药后果皮内残留量一直呈下降趋势,果肉及果心中农药残留却先是增加,分别于第4d、第5d 达到最高残留浓度,以后再开始下降。水胺硫磷可由果皮渗入果实内部,为一连续过程。向内渗透的强度愈向里愈小。
1000 times 40% After spraying the Golden Delicious apple tree, the residues in the peel can be reduced to below 0.15ppm on the 39th day and the fruit needs 2 days. Fruit three parts to the same concentration of residual time length; peel> pulp> fruit heart. The residual content of different parts of the fruit after spraying the order is: peel> pulp> fruit heart, peel residue is to limit the safety of fruit is the key factor. After spraying, the residual amount in the skin had a downward trend. However, the pesticide residues in the pulp and fruit heart first increased, reaching the highest residue concentration on the 4th and 5th days, respectively, and then began to decline again. Isocarbophos can penetrate into the interior of the fruit pericarp for a continuous process. The inward penetration of the more strength in the smaller.