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近几年我乡核果类果树上的桑白、朝鲜球坚介壳虫为害猖獗,为探讨其有效的防治方法,1981～1983年我们与本乡的张官、前百、徐家等村的果树虫情测报点一起,在探讨这两种介壳虫发生规律的同时,进行了药剂防治试验。设如下处理:①石硫合剂(俗称硫黄水)。②乐果乳剂。③敌敌畏乳剂。④1605乳剂。⑤洗衣粉(1983年增设)。分别于介壳虫卵孵化期、朝鲜球坚介壳虫越冬若虫爬出蜡质层活动期喷布。结果看出,5种药剂中以硫黄水、洗衣粉效果最好,杀虫率均近100％。喷硫黄水在介壳虫卵孵化期,用0.3～0.5度;在越冬若虫爬出活动期用5度;洗衣粉一般用800倍液。 1984年对硫黄水、洗衣粉的重复试验表
In recent years, my rural stone fruit trees Mori white, North Korea ball scale insects rampant, in order to explore its effective control methods, from 1981 to 1983 with our own village Zhang, Qian Bai, Xu and other village fruit trees Insect survey points together, in discussing the law of these two kinds of scale insects occurred at the same time, conducted a chemical control test. Set as follows: ① stone sulfur mixture (commonly known as sulfur water). ② dimethoate emulsion. ③ enemy dichlorvos emulsion. ④1605 emulsion. ⑤ washing powder (added in 1983). Respectively in the scale eggs hatching period, North Korea ball scale insect overwintering nymphs wax layer activity out of the spray. The results showed that the five agents to sulfur water, washing powder best, insecticidal rates were nearly 100%. Spray sulfur water in the scale eggs incubation period, with 0.3 to 0.5 degrees; in the wintering nymphs crawl out of activity with 5 degrees; washing powder is generally used 800 times. 1984 sulfur water, washing powder repeated test table