6Muse R, Schmitthenner A F, Partyka R E. Pythium spp. as sociated with foliar blighting of creeping bentgrass [J]. Phy topathology, 1974,64 : 252-253.
7Saladini J L, Schmitthenner A F, Larsen P O. Prevalence of Pythium species associated with cottony-blighted and healthy turgrassesinOhio[J]. Plant Disease, 1983, 67:517 519.
8Larsen P O, Joyner B (1, Schmitthenner A F. Pythium spe cies isolation, biology and identification [J]. Advances in Turfgrass Pathology, 1980, 33-36.
9Abad Z G, Shew H D, Lucas L T. Characterization and path- ogenicity of Pythium species isolated from turfgrass with symptoms of root and crown rot in North Cqrolina[J]. Phyto- pathology, 1994,84 .- 913 921.
10Van der Plaats-Niterink A J. Monograph of the genus Pythi um [M]. Netherlands: Academy of Science and Letters, 1981=242 260.
