中国北方果树蚧虫为害及天敌利用分析

蚧类在北方果树上普遍发生且危害严重，本文对北方果树蚧类为害及其天敌利用进行的分析探讨认为，丰富的天敌资源、天敌对蚧虫的有效控制、灭敌的成功引入、天敌的人工繁殖和商品化生产、大敌与蚧虫种群消长的相关性以及对蚧虫及其天敌的生物学特性的研究等均有利于对北方果树蚧类进行牛物防治。因此，在北方果区利用天敌进行蚧虫的生物防治，具有重要的应用和推广价值。最后提出了保护和利用天敌进行生物防治的对策。

Review on Occurrence of Scale Insects and Their Natural Enemies Utilization in Orchards of North China

Scale insects occurred universally and were harmful seriously in orchards of North China. In the present paper, the occurrence and prospect on utility of natural enemies for biocontrol of scale insect on fruit tree in north China is discussed. In our opinion, the factors that will sharply accelerate utility of natural enemies for biocontrol of scale insect are not only abundant resources, successful introduction, natural control to scale insect, artificial reproduction and commercial production of natural enemies, but also research into biological characteristics, population dynamics of natural enemy and scale insect. Protection and utilization of natural enemies in China will be valuable for wide use and application. Suggestions for conservation of insect diversity are also proposed here.