几种松干蚧捕食性天敌的研究

<正> 日本松干蚧Matsucoccus matsumurae Kuwana在我国山东、辽宁、江苏和浙江等地危害松树枝干,严重时使整株枯死,甚至成片松林被摧毁;但也有些林分虽然虫口数量不少,而幸免毁灭。其原因除了地形、植被、土壤以及抚育管理等因子外,一个重要原因是由于在该林分中生存着较多种类及数量的捕食性昆虫、螨类以及病原微生物,它们是日本松干蚧的重要天敌。由于松林环境维持自然生态平衡,在一定程度上,使松干蚧对松树危害所造成的损失在经济阈值以下,因此,这些天敌对日本松干蚧的抑制作用就不可忽视。本文就几年来对江苏地区日本松干蚧重要天敌的研究作一小结。

STUDIES OF SOME MAJOR PREDACEOUS NATURAL ENEMIES OF MATSUCOCCUS MATSUMURAE ( KUWANA )

Major predaceous natural enemies of the pine bast scale (Matsucoccus matsumurae Kuwana) in Jiangsu province include the brown lacewing, predaceous bug, predaceous mite, predaceous cecidomiid fly, syrphid, ant, etc. They move quickly and are greedy and generally synchronous with M. matsumurae Kuwana. All this suggests a promising prospect of biological control over the pine bast scale. This paper discusses the morphological and biological characters of these natural enemies.