Private Bag X1 1 article published in JoVE Biology Mass Production of Entomopathogenic Fungi, Metarhizium robertsii and Metarhizium pinghaense, for Commercial Application Against Insect Pests Letodi Luki Mathulwe1, Antoinette Paula Malan1, Nomakholwa Faith Stokwe1 1Department of Conservation Ecology and Entomology, Faculty of AgriSciences, Private Bag X1 Entomopathogenic fungi have gained importance as the biological control agents of agricultural insect pests. In this study, the mass production of a sufficient number of resilient infective propagules of South African isolates of both Metarhizium robertsii and M. pinghaense for commercial application against insect pests was successfully conducted using agricultural grain products.