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Mortalities of tobacco beetle infected by four entomogenous fungi

Zou Xiao1,Zhang Xiaomin2,Yang Hui2,Wu Rangxin2,Hu Haiyan1,Luo Li1,Liu Aiying1(1.Institute of Fungus Research,Guizhou University,Guiyang 550025,China;2.China's Tobacco Industry Companies,Guizhou Branch,Guiyang 550004, China)  
The lethal effects of four fungi on tobacco beetles were tested.The results showed that tobacco beetles could be infected by the four fungi.In the experiments,Beauveria bassiana originated from Guangxi Province was shown to be the best strain.It could cause half of the beetle's death rate in 10 days at 108 spores/mL.The regression equation describing the relationships between the infection time,spore concentration and the lethal rate were constructed by the software SPSS.
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