Abstract
The pathogenicity of 25 isolates of entomogenous fungi to the Brown-Winged Green bug, Plautia stali, was investigated. Eight isolates of Beauveria bassiana obtained from P. stali and 5 isolates of B. bassiana obtained from other insects showed pathogenicity. However, another 5 isolates of B. bassiana obtained from other insects showed no pathogenicity. Two isolates of Paecilomyces farinosus also showed two type of pathogenicity. No isolates of Beauveria brongniartii and Nomuraea rileyi showed pathogenicity.