黑足树蜂及寄生天敌黑色枝跗瘿蜂的初步研究

<正>１９９２－１９９４年进行了松树害虫黑足树蜂及寄生天敌黑色枝跗瘿蜂生物学特性的砚察研究、黑足树蜂的为害程度测定及发生与环境的关系。发现黑色枝跗瘿蜂成虫羽化高蜂的出现迟于黑足树蜂二周左右，并经黑足树蜂在树皮上的产卵也产卵于寄主的卵或初孵幼虫内寄生，寄生率高达４６％以上。是寄生黑足树蜂并控制其种群的关键性天敌。

A PRELIMINARY STUDY ON SIREX JUVENCUS IMPERIALIS KIRBY AND ITS PARASITICAL NATURAL ENEMY IBALIA LEUCOSPOIDES

Their host, distribution, morphological characterisoics their bionomics are described.The damages of S. juvencus imperialis are measured, and we have also surveyed the relationship between their occurrence and environment. The research indicates that the occurrence Peak of the adultsof I. leucospoides is two weeks later than S. Juvencus imperialis.I.leucospoides which oviposited its eggsinto the inside of eggs of juvenil larvaes of S. juvencus imperialis through their holes of oviposition. Therate of Parasitism of I. leucospoides is higher than 46 %. To control the population of S. juvencus imperi alis. I. leucospoides is the dey natural enemy.