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浙江省丽水地区是马尾松毛虫白僵病自然常发区。近几年来采集并分离到球孢白僵菌9 个野生菌株。测定它们在PDA 平板上的营养生长和产孢量, 以及菌株对马尾松毛虫的致病力。结果表明, B2 , B4 和B14 等3 个菌株致病力最强, 营养生长最快, 产孢量较高, 达3 亿个·cm - 2 , 在今后生产上对马尾松毛虫的防治最具应用潜力; 次之是B7 , B10 , B11 和B12 等4 个菌株; 而B6 和B13 菌株的各个性状较差,几无潜力。同时也说明自然界中存在遗传多样性的自然菌株。表5 参6
Lishui, Zhejiang Province is the natural occurrence of white stiff stiff disease Dendrolimus punctatus. In recent years, 9 wild strains of Beauveria bassiana were collected and isolated. Their vegetative growth and sporulation on PDA plates were measured, and the pathogenicity of the strains to Dendrolimus punctatus was evaluated. The results showed that the three strains B2, B4 and B14 had the strongest virulence and the fastest vegetative growth with a high sporulation rate of 300 million cm - 2. The potential for application; followed by four strains of B7, B10, B11 and B12; and B6 and B13 strains of each trait is poor, with few potential. It also shows natural strains that have genetic diversity in nature. Table 5 reference 6