Composition and pathogenicity differentiation of pathogenic species isolated from Fusarium head blight in Shandong Province Pathogenicity differentiation and genetic diversity of Verticillium dahliae of cotton in Shaanxi Pathogenicity differentiation of Verticillium dahliae of cotton in naturally infested soil Studies on Differentiation of Pathogenicity of Botrytis cinerea Isolates fromFour Hosts to Strawberry Polymorphism analysis of Botrytis cinerea and its pathogenicity differentiation in Xinjiang The pathogenicity differentiation and variability of Verticillium dahliae from cotton in northern Xinjiang Pathogenicity differentiation of Phytophthom parasitica and the disease resistance difference of tobacco against black shank PATHOGENICITY DIFFERENTIATION OF ALTERN ARI A ALTERN AT A AND INDUCED RESISTANCE OF TOBACCO TO BROWN SPOT BY WEAK VIRULENCE STRAINS Studies on Differentiation of Pathogenicity of Botrytis cinerea Isolates fromFour Hosts to Strawberry Pathogenicity differentiation of isolates of Phytophthora capsici to pepper Pathogenicity differentiation of Thielaviopsis basicola and resistance difference of tobacco against black root rot THE VARIETAL RESISTANCE OF RICE TO BACTERIAL FOOT ROT AND THE DIFFERENTIATION ON VIRULENCE OF THE PATHOGEN