The test adopted by the different varieties of resistance and cross-species around the vaccination, the identification of pathogenic changes in the analysis of Ustilago crameri koern division race.

• 本项试验通过用不同抗性品种与各地菌种交叉接种，鉴定其致病性变化，分析出黑穗病病菌小种分化。在谷子黑穗病病菌群体中确实存在着不同的小种分化。