Keywords pasture degradation;host range;infection cycle;inoculation;pathogenicity;root rot;seed-borne fungus;systematic disease;shoot-invading fungus;overwintering;

• 草地早衰;根腐病;寄主范围;接种;侵染过程;侵染循环;系统性病害;越冬;茎叶入侵真菌;根部入侵真菌;致病性;种带真菌;