桃树蚧壳虫雌成虫和若虫群集在桃树枝干上常年为害，剌吸桃树汁液，轻者削弱树势，重者使枝条枯死，甚至全株死亡。蚧壳虫因其体表有白色蜡粉分沁，形成介壳保护着虫体，一般药剂很难渗过其介壳而杀死此虫。而采用渗透力很强的石硫合剂防治蚧壳虫效果很好，此法不仅经济实惠， Peach tree scale insects insect pests and nymphs pests in the branches perennial pests damage, peach suction juice, lighter weaken the shores, severe branches make dead, even the whole plant died. Scale insects because of its body surface with a white wax powder Qin, the formation of shell protects the worm body, the general agent is difficult to penetrate its shell and kill this insect. The use of a strong penetration of sulfur sulfur mixture control scale insects good effect, this method is not only economical,