:3株球孢白僵菌 (Beauveriabassiana)Bb 0 2 ,Bb 0 3和Bb 0 7在不同温度 ,pH值和培养基上培养 ,结果表明 ,三者的最适生长温度在 2 5℃～ 30℃间 ;Bb 0 2和Bb 0 7在pH4.0～ 6 .0生长良好 ;适量的蛋白胨或酵母浸膏可促进菌株的生长 ,但对葡萄糖和麦芽糖的利用能力没有明显差异 ,三者在PPDA ,SDAY和SMAY上生长良好。生物测定表明 ,3菌株对小麦蚜虫均具有较强的毒力 ,但各菌株的最适剂量略有差异 ,其中Bb 0 2以 10 6mL-1较佳 ,Bb 0 3以 10 7mL-1最好 ,Bb0 7则介于 10 7mL-1～ 10 8mL-1之间 : Three strains of Beauveria bassiana Bb 0 2, Bb 0 3 and Bb 0 7 were cultured at different temperature, pH value and medium. The results showed that the optimal growth temperature of the three strains was between 25 ℃ and 30 ℃ ℃; Bb 0 2 and Bb 0 7 grow well at pH 4.0 ~ 6.0; the appropriate amount of peptone or yeast extract can promote the growth of the strain, but there is no significant difference in the utilization of glucose and maltose, , SDAY and SMAY grow well. The results of bioassay showed that the strain 3 had strong virulence to wheat aphids, but the optimum dose for each strain was slightly different, with Bb 0 2 being 10 6 mL-1 and Bb 0 3 being 10 7 mL-1 being the best , While Bb0 7 is between 10 7 mL-1 and 10 8 mL-1