论文部分内容阅读
本文调查咸阳市园林蚧虫有２６种，以疣坚大球蚧、朝鲜球坚蚧、草履蚧等对林木危害较重。蚧虫天敌主要有８种，其中北京举肢蛾对疣坚大球蚧的数量有重要抑制作用。疣坚大球蚧在咸阳主要危害栾树；年发生１代，以２龄若虫在枝条上越冬；雌雄性比１１．８８，４月下旬为产卵盛期。北京举肢蛾在陕西年发生１代，以蛹在疣坚大球蚧的介壳内越冬；幼虫期１个月，它是以幼虫钻入蚧虫体内取食卵块，取食期与疣坚大球蚧的卵期相吻合，对蚧虫有自然控制作用
In this paper, 26 species of garden scale insects in Xianyang City were investigated. There are 8 kinds of natural enemies of scale insects, of which Beijing Limb moths have an important inhibitory effect on the number of large scale gecko. Warty large ball scale in Xianyang major damage to the Koelreuteria tree; annual occurrence of 1 generation, with 2 instar nymphs in the branches overwintering; sex ratio of 11.88, late April for the spawning period. Beijing Liriomyces occurred in Shaanxi in the 1st generation, with the pupa in the large warty ball gecko shell overwintering; larvae of 1 month, it larvae into the scale insect body to take eggs, feeding and warts sturdy Egg age scales match, has a natural control of scale insects