Epicoccosorus sp. YCSJ-112 (KFCC 10788) (I) as novel herbicidal microorganism against Eleokaris kuroguwai Ohwi (II), parasitic herb on rice fields is screened from rice leaves of the disease area. (I) is resistant to Butachlor, Triccyalazole, Neoasozin, Penthoate and BPMC as herbicide and is useful for herbicides.