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中文摘要：
为明确河北昌黎、广西资源两地不同葡萄品种来源霜霉菌致病力分化情况,本研究利用离体叶盘接种法测定了河北、广西主栽品种‘红宝石无核’、‘红地球’及‘巨峰’来源葡萄霜霉病菌对不同鉴别寄主的致病力,观察不同地区、不同寄主来源病菌对同一感病材料以及同一寄主来源病菌对不同感病材料的致病力大小是否存在差异。结果表明：不同地区同一寄主来源病菌及同一来源不同菌株间致病力均存在差异,说明两个地区病菌群体间和群体内各菌株间均存在分化;两地不同寄主来源病菌群体对同一感病材料的致病力及同一寄主来源病菌群体对不同感病材料的致病力均存在显著差异,且广西资源地区菌株间差异性比河北昌黎地区更明显,说明不同寄主来源的菌株存在一定程度的分化。
英文摘要：
In order to understand the virulence differentiation of Plasmopara viticola in Hebei and Guangxi, the pathogenicity of three P. viticola strains collected from ‘Ruby Seedless＇, ‘Red Globe’and ‘Kyoh6＇ were ana- lyzed by the inoculation method of isolated leaf disc. The results showed that the pathogenicity of P. viticola in the two areas or isolates from the same host variety were different. There were also some differences among dif- ferent pathogenic strains, and the differences in Guangxi were more significant than those in Hebei. Therefore, there are diversities between the groups of the pathogen from different areas, and the strains from different host varieties are differentiated.
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