1988年3月底,在阎家庄乡刘家庄果园的23株苹果树上进行山楂叶螨防治试验。用凡士林1.5kg,加0.25kg2.5％敌百虫粉剂,调成粘糊状,在苹果树主干中段涂15～20cm宽的药膏带,上端缚一块20～25cm宽牛皮纸呈伞形,防止风、雨、日晒使药失效。主干基部,树体大小范围内,撒施2.5％ By the end of March, 1988, hawthorn spider mites were tested on 23 apple trees in Liujia Zhuang Orchard, Yanjiazhuang. Vaseline 1.5kg, add 0.25kg2.5% trichlorfon powder, transferred into a sticky paste, the middle of the apple tree painted 15 ~ 20cm wide ointment band, the upper end of a 20 ~ 25cm wide kraft paper umbrella, to prevent the wind Rain, sun make medicine invalid. Main trunk, tree size range, spreading 2.5%