一氯杀螨具有三氯杀螨的杀虫效应,又能与多种农药混合使用,1985年开始在我县大面积推广,喷布浓度多为500—800倍,防效显著。出现的问题是易引起金冠品种产生轻重不同果锈,影响商品品质。据1985年在寿光园艺场调查,果锈普遍率达36.6%,而喷久效磷或三氯杀螨醇仅19.41%。调查中除? Chlorophyll mites with trichlorfon mite insecticidal effect, but also mixed with a variety of pesticides, started in 1985 in my county a large area to promote the concentration of more spray 500-800 times, significant effect. Emergence of the problem is easy to cause different varieties of gold crown produce different rust, affecting product quality. According to a survey conducted in Shouguang Horticultural Field in 1985, the prevalence rate of fruit rust was 36.6%, while that of spraying monocrotophos or dicofol was only 19.41%. In addition to the survey?