The research was aimed at knowing the virulence of 3 best isolates ofB. bassiana irradiated with ultra violet at different intensity against P. xylostella. Theresearch was conducted from July 2005 to February 2006 in EntomologicalLaboratory, Department of Plant Pest and Diseases, Faculty of Agriculture, SriwijayaUniversity.The experiment was arranged in a Factorial Completely Randomized Design …