Identification on biological traits and physiological race of Phytophthora sojae in Xinjiang.

By studying the biological traits of Phytophthora sojae 5 strains were isolated from soybeans in Shihhotze,Aletai and Ili.The results showed that all strains growed at 10～35℃,the optimum growth temperature was 25℃ and pH was 7.0.Mycelial growed quickly and produced plenty of oospores at carrot,soybean juice and V8 media.Identification of race of Phytophthora sojae indicated virulence formula were classified into four virulence types which were obviously different from 53 races reported in domestic and overseas,respectively.It was estimated that Phytophthora sojae in xinjiang are possible new.