两株杀虫真菌对陕西榆林草原蝗虫的防治效果

本研究对两株杀虫真菌金龟子绿僵菌QL-107和球孢白僵菌GYS-13对东亚飞蝗的毒力进行了测定，并利用其对榆林草原蝗虫进行了田间防治试验。通过室内生测发现球孢白僵菌GYS-13和金龟子绿僵菌QL-107对东亚飞蝗均具有较强的毒力，田间防治试验证明，两株杀虫真菌在山地草原对蝗虫综合防治效果达到75%以上，特别是球孢白僵菌GYS-13对坡地草原蝗虫总防治效果高达81.8%。结果表明，两株杀虫真菌具有进一步开发为微生物杀虫剂的潜力。

The Control Efficacy of Two Fungal Strains against Locusts of Grassland in Yulin,Shaanxi

The virulence of two fungal strains, Beauveria bassiana GYS-13 and Metarhizium anisopliae QL-107, were evaluated in the laboratory and the two strains were tested as biocontrol agents for grassland locusts in Yulin. The bioassay showed strong virulence of both strains against Locusta migratoria manilensis under laboratory conditions. And the field control tests at the mountain grassland indicated that the two strains afforded over 75% control against the locusts complex including pests of different species and ages. Especially, the B. bassiana GYS-13 reached a control of 81.8% against all the locusts in mountain slopes. These findings indicate potential of the fungal strains B. bassiana GYS-13 and Metarhizium anisopliae QL-107 to be developed as bio-pesticides against the locusts.