Activity analysis and gene expression of cell wall degradation enzymes in Setosphaeria turcica f. sp. zeae and S. turcica f. sp. sorghi Monitoring of resistance and baseline sensitivity of Setosphaeria turcica to azoxystrobin in Gansu Obtaining and biologic characteristics of melanin-deficient mutants of Setosphaeria turcica Identification of physiological races and AFLP analysis in F1 generation of sexual hybridization between isolates of Setosphaeria turcica Effects of tricyclazole on the pathogenicity of Setosphaeria turcica The occurrence and fertility analysis of bisexual strains of Setosphaeria turcica