红腹树蜂的初步研究

红腹树蜂(Sirex rufi-abdominis Xiao et Wu)属山林区发现的一种新害虫。本种害虫以幼虫蛀食马尾松树干,也有与松天牛、松象鼻虫和小蠹虫等共同寄居危害的,单株马尾松上红腹树蜂虫口可达3千条以上,被害松树多呈零星分布,极少小块状。被害松树枯死,严重威胁松林生长,导致马尾松死亡的主要原因是由于雌蜂在产卵时分泌的无色胶状物,使形成层组织细胞变褐而坏死,从而立木枯死。红腹树蜂的幼虫在坑道内还常遭真菌侵染。作者于1980—1981年对该虫的生物学特性及防治进行了调查研究,结果报道于后。

A PRELIMINARY STUDY ON SIREX RUFI-ABDOMINS

The horntail Sirex rufi-abdomins Xiao et Wu is a new insect pest seriously damage to Pinus massoniana Lamb found recently at Chu Xian county,Anhui province.It has one generation per year and overwinters as larva in the sapwood.In the late March next year,the larvae eat sapwood.Pupation takes place in August and September,and the adults emerge in Septmber and October.The eggs are laid in the sapwood.The pine trees injured are gradually dead.The larval stage lasts more than ten months,and pupal stage 17 to 20 days and egg stage 21 to 24 days,and adult stage 5 to 15 days. The most effective control method is keeping the stand in a sanitary condition and cutting the dead trees before summer and handling them as quickly as possible.