杏球坚蚧,又名杏球坚介壳虫或杏球蚧,是危害杏、桃、李等果树的主要害虫。过去,应用石硫合剂防治的效果不一致。一九七六年,我们在正定县大丰屯大队的杏树上又进行了试验,效果很好。主要是防治时期问题。根据我们试验观察,杏球坚蚧,越冬的若虫三月上中旬开始活动。行动缓慢,体背浓褐色,扁椭圆形。杏花芽膨大(三月十九)以后,虫体逐渐膨大。三月下旬,虫体脊背及周缘隆起,浓褐色并有黄色条纹,即开始固定为害。三月二十九日观察,全体膨大成椭圆形,同 Apricot ball Kenyan, also known as Xing ball Jian scale insects or albino ball scale, is harmful to apricot, peach, plum and other fruit trees of the main pests. In the past, the application of lime sulfur mixture control effect is inconsistent. In 1976, we conducted another experiment on the apricot tree of the Dafengtun Brigade in Zhengding County, which worked very well. Mainly prevention and control problems. According to our experimental observation, apricot ball scale, overwintering nymphs began activities in mid-March. Slow action, dark brown body, flat oval. Apricot flower enlargement (March 19) later, the gradual enlargement of parasites. In late March, insect body back and periphery bulge, dark brown and yellow stripes, that is, the beginning of fixed damage. Observed on March 29, all swollen into oval, with