Pengaruh penambahan tepung kulit udang pada medium pertumbuhan terhadap kemampuan Metarhizium majus UICC 295 menginfeksi larva Oryctes rhinoceros Linnaeus = The effect of shrimp shell powder in growth medium on the pathogenicity of Metarhizium majus UICC 295 to infect Oryctes rhinoceros Linnaeus larvae