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Primary Study on Screening of High Virulent Strains and Biological Characteristics of Beauveria bassiana against Athetis lepigone (Moschler) (Lepidoptera:Noctuidae)
Author(s): 
Pages: 439-443
Year: Issue:  3
Journal: Chinese Journal of Biological Control

Keyword:  二点委夜蛾 球孢白僵菌 生物学特性 生物测定 菌株筛选;
Abstract: 本研究对分离自二点委夜蛾Athetis lepigone(Moschler)越冬幼虫僵虫上分离的43株球孢白僵菌菌株进行生物测定,筛选到致病力较强的4株菌株,并对这4株菌株的菌落形态、菌株生长速度、产孢量和萌发率等生物学性状进行了测定。同时以二点委夜蛾2龄幼虫为供试虫源,测定了这4株白僵菌菌株对二点委夜蛾的致病力,从中筛选出具有生长速度快、萌发率高、产孢量大等培养性状优及毒力较强的球孢白僵菌Ed-41菌株。该菌株在浓度为1×107孢子.mL-1悬浮液喷雾接种处理后,在26℃条件下,第8 d供试幼虫的死亡率达85%,显示出对靶标害虫的具有较好的毒力,在二点委夜蛾害虫生物防治中将有潜在的的应用价值。
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