不同温、湿度下球孢白僵菌Bb00菌株的生长状况及对桑天牛的致病力研究  

Effect of Temperature and Humidity on Mycelium Growth of A Beauveria bassiana Strain and its Pathogenicity Against Apriona germari Larvae

作　　者：王晓红[1] 黄大庄[1] 李会平[1] 纪慧芳[1] 杜绍华[1] 

机构地区：[1]河北农业大学,保定071000

出　　处：《蚕业科学》2007年第2期167-171,共5页ACTA SERICOLOGICA SINICA

基　　金：河北农业大学将帅人才计划项目(编号950036)

摘　　要：球孢白僵菌(Beauveria bassiana)可作为多种农业害虫的真菌杀虫剂。研究测定了不同温、湿度条件对球孢白僵菌Bb00菌株的营养生长、孢子萌发率以及对桑天牛(Apriona germari)幼虫致病力的影响。结果表明:25℃时该菌株营养生长最好,孢子萌发速度快且萌发率高,在此温度下菌株对桑天牛幼虫的致病力也最强;相对湿度为95%～100%时菌株的营养生长最好,随着相对湿度的增大孢子萌发速度、萌发率也增高,相对湿度100%时达到最高,此时被该菌株感染的桑天牛幼虫的死亡速度快,死亡率也最高。Beauveria bassiana could be used as a fungus insecticide for some agricultural pests. The effect of temperature and humidity on the mycelium growth, spores germination and the pathogenicity against Apriona germari larvae of a Beauveria bassiana strain Bb00, a high virulent strain from the soil, were tested. The result showed that the optimum temperature for mycelium growth and spores germination were 25 ℃, and at this temperature A. germari larvae had highest morality. The optimum RH for mycelium growth ranged from 95% to 100%. The germination speed and rates of spores increased with the RH increasing, and the larvae died most quickly and the mortality reached the highest under 100% RH.

关 键 词：球孢白僵菌Bb00菌株 桑天牛幼虫 温湿度 菌落生长 孢子萌发率 致病力 

分 类 号：S476.12[农业科学—农业昆虫与害虫防治]