关键词: 白僵菌, 肿腿蜂, 松墨天牛, 致病力

Abstract:

By the infection experiment of Beauveria bassiana to the overwintering larvae of Monochamus alternatus under different temperatures and dosages,the results showed:20～25 ℃ was the fittest temperature range for B.bassiana to M.alternatus.Under 20 ℃,parasitic rates of B.bassiana to M.alternatus by three kinds of concentration of B.bassiana spore suspension were 58%、95% and 100% respectively.By comparing mortality of M.alternatus at 4 th instars after inoculation of B.bassiana,Scleroderma guani and S.guani with B.bassiana,on the 7 th day,the highest mortality of M.alternatus only inoculating B.bassiana was 26.3%;the highest mortality of M.alternatus only inoculating S.guani was 55.0%;and the highest montality of M.alternatus inoculating and S.guani with B.bassiana was 94.4%.The field experiment showed that the mortality of the M.alternatus larvae treated by S.guani with B.bassiana was 61.1%,by S.guani was 40.8%,and by B.bassiana was 0.0%.So S.guani with B.bassiana might have better effect to the larvae of M.alternatus.

Key words: Beauveria bassiana, Scleroderma guani, Monochamus alternatus, pathogenicity