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除虫脲与我国生产的灭幼脲3号为同系化合物,同属昆虫激素类杀虫剂,它能抑制昆虫表皮几丁质的合成。昆虫幼虫吃下后,表皮的几丁质合成受到抑制,在蜕皮时不能形成新表皮,使之变态受阻而形成畸形或死亡。该杀虫剂对粘虫、尺蠖、舟形毛虫、桃小食心虫等害虫都有较好的防治效果。由于具有较高的选择性,有利于保护生态平衡,是有发展前途的农药品种。为了评价除虫脲在苹果及土壤中的残留及消解动态,我们于1986～1987年进行了两年的残留试验研究工作。
Diflubenzuron and China’s production of mefenphos-3 for the same series of compounds, both insects hormones insecticides, which can inhibit the insect epidermal chitin synthesis. Insect larvae eat, the chitin synthesis of the epidermis is inhibited, the molt can not form a new epidermis, so that abnormal degeneration and death or deformity. The insecticide on armyworms, Scodoptera, boat-shaped caterpillars, Peach Moth and other pests have better control effect. Because of its high selectivity, which is conducive to the protection of ecological balance, there is a promising pesticide variety. In order to evaluate the residues and digestion dynamics of diflubenzuron in apple and soil, we carried out two years of residual experimental research from 1986 to 1987.