出于机油乳剂对天敌安全,害虫不易产生抗药性,旧外已把它作为果园害虫综合防治的基础物质,美国佛罗里达州一年就使用1893～2650万1。我国本世纪80年代也开始大量应用于柑桔蚧、螨防治,但对其施用时期和对柑桔的影响反映不一。为更好地应用于机油乳剂,笔者于1991年在重庆对其施用时期对柑桔的影响进行了研究。现将结果报告于后。 Out of the oil emulsion on the safety of natural enemies, insects are not easy to produce resistance, the old outside of it has been the basis for the prevention and control of orchards pests, Florida, the United States a year to use 1893 ~ 2650 1. China’s 80s of this century also began to be widely used in Citrus sinensis, mites prevention and treatment, but its application period and the impact of citrus different. In order to better apply to the oil emulsion, the author in Chongqing in 1991 on the impact of citrus during its application were studied. The results are reported later.