Research has been conducted to control sheath blight disease of rice by identifying preferred strains of microbial antagonists, optimizing the conditions for producing effective control agents on a commercial scale, formulating microbial antagonists for effective application, and by testing the products in pot and field settings. (Lewis 1991; Lumsden et al. 1995; Rabindran and Vidhyasekaran 1996; Vidhyasekaran et al. 1997; Kanjanamaneesathian et al. 1998, 2000; Pengnoo et al. 2000; Radja Commare et al. 2002; Vasudevan et al. 2002; Mew et al. 2004). Some research protocols have led to the commercialization of some products for controlling plant diseases of economically important cash crops such as cotton, peanut and soybean, particularly in the United States of America (Schisler et al. 2004).