Lactobacillus is used for production of curd. Saccharomyces cerevisiae is used for the fermentation of palm sap to obtain toddy drink. Propionibacterium sharmanii is used for production of swiss cheese. Aspergillus niger is used for the commercial production of citric acid. Trichoderma polysporum is used for the production of cyclosporin A and also act as a biocontrol agent. A, C are used in industrial production of citric acid and cyclosporin-A.