施菌方式和寄主状态对白僵菌萌发与侵染的影响

Influence of drug form and host state on germination and infection of Beauveria bassiana .

在白僵菌侵染的适宜温度下，菌液处理的侵染进程和寄主死亡速率都较菌粉处理的快，这是由于不同湿度引起的．在０ ～１０ ℃的自然变温下，孢子不能萌发引起侵染．白僵菌在死虫体上的发展速度比在活虫体上快得多；经冷处理的活虫与新采活虫同样具有抵御侵染的能力．因此。

Under appropriate temperature condition, the infection process of Beauveria bassiana and the host death rate of host were faster in liquid treatment than in powder treatment, which was due to their different humidity. The conidia could not germinate and infect host at low atmospheric temperature (0～10℃). The development of B.bassiana in dead hosts was faster than that in living hosts. Both the hosts after low temperature treatment and the fresh hosts had the same resistance to infection. Therefore, it is unsuitable to control Dendrolimus punctatus in forests through releasing fungus in winter.