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昆虫在越冬期间易于发生真菌病害,被真菌寄生死亡的比率较高。在应用白僵菌防治松毛虫过程中,也发现有这种现象,我省松毛虫一般以四岭幼虫在11月中、下旬开始越冬,越冬场所多在树皮裂缝,或在针叶丛中集结成团,也有在树干基部杂草中越冬的在以菌治虫时,于10月至11月中、下旬期间,将白僵菌施放林间,让白僵菌孢子附在松毛虫体上带菌越冬,第二年二月底至三月上旬,松毛虫上树活动时止,松毛虫越冬期长
Insects are susceptible to fungal disease during winter and have higher rates of parasitic death by fungi. Beauveria bassiana application in the process of prevention and control of pine caterpillars, but also found this phenomenon, the province’s pine caterpillars in general to four Ling larvae in mid-November, late winter, winter places more in the bark cracks, or in the bushes Aggregate into groups, but also in the trunk of the weeds in the winter overwintering in the control of bacteria, in October to mid-November, late Beauveria bassiana Shi Lin, let Beauveria bassiana spores attached to the body With the bacteria overwintering, the second year from the end of February to early March, when the activity of pine caterpillars, the pine caterpillar overwinter