苏云金杆菌β-外毒素对落叶松毛虫的毒力测定

Toxicity Assay forβ-exotoxin of Bacillus thuringiensis Berliner to Dendrolimus superans Butler

用两种苏云金杆菌β-外毒素对落叶松种子活性、落叶松毛虫毒力进行了测定,并且进行了苏云金杆茵β-外毒素对落叶松毛虫黑卵蜂的毒力试验,结果表明：苏云金杆菌β-外毒素对落叶松种子发芽率具有抑制作用,对落叶松毛虫幼虫致死率可迭69．7%,对落叶松毛虫黑卵蜂(Telenomus tetratomus Thomson)致死率达57．3%。

Seed activity of larch and toxicity of D. superans were determined using two strains of β-exotoxin from B. thuringiensis, and a toxicity testing for B. thuringiensis β-exotoxin to Telenomus tetratomus Thomson was also conducted. Result showed that B. thuringiensis β-exotoxin can inhibit the germination rate of larch seeds. The lethality rates of D. superans and T. tetratomus reach 69.7% and 57.3%, respectively.