从松叶蜂分离的球孢白僵菌及其致病性

从东北伊通红松林采集的自然染病死亡的帕克阿扁松叶蜂Acantholyda虫尸上分离获得一株球孢白僵菌,定名为FDB01。用该菌株孢子悬浮液感染油松阿扁叶蜂Acantholyda posticalis和落叶松叶蜂Pristiphora erichsonii幼虫,研究该菌株的致病情况。结果表明,用浓度为2×108孢子/mL的孢子悬浮液处理16d后,该菌株对油松阿扁叶蜂和落叶松叶蜂的致死率分别达到了94.4%和100%,说明该菌株对松叶蜂具有很强的致病力。

Beauveria bassiana isolated from pine sawfly and its pathogenicity

Beauveria bassiana strain FDB01 was isolated from naturally diseased pine sawfly, Acantholyda parki, collected from Yitong of Jilin Province in the northeast of China. Its pathogenicity was tested with conidial suspension (2×108conidia/mL) on the two species of pine sawfly, Acantholyda posticalis and Pristiphora erichsonii. The results showed that the strain FDB01 was pathogenic fungus and caused the death of A. parki. Treatment with conidial suspension the mortalities of the larvae of A. posticalis and P. erichsonii reached 94.4% and 100%, respetively in 16d. It indicated that FDB01 is a high virulent strain to pine sawflies.