Antagonism and mechanism of action of Trichoderma aureoviride against Pythium aphanidermatum causing turfgrass root rot A primary study on the pathogenesis of Pythium aphanidermatum to Lolium perenne Biological characteristics of a pathogen of turfgrass root rot disease Antifungal activity of antagonistic strain BMP-11 against Pythium aphanidermatum and its identification Resistance Evaluation of Selected Tall Fescue Varieties to Pythium Blight Caused by Pythium aphanidermatum