6Dorranee A E, Berry S A, Bowen P. Characterization of Pythium spp. from three Ohio fields for pathogenicity on corn and Soybean and metalaxyl sensitivity[J]. Plant Health Progress, 2004(1 ): 202.
7Charles W. Root Rots of Green Beans and Lima Beans[C]. Vegetable Disease Information Note 7 (VDIN-007).