茶树品种对茶饼病的抗性研究

用茶饼病菌的担孢子悬液接种33个茶树品种（大叶种17个，中叶种16个），用离体和活体两种方法鉴定了茶树品种对茶饼病的抗性。结果表明，没有免疫的品种，各品种均不同程度的感染茶饼病，高度抗病的有槠叶蟓永307等9个品种。严重感病的有台湾大叶、越南大叶等9个品种。大叶种比中叶种更感病，抗病品种表现出发病叶位高（新叶1、2叶）、潜育期长（10-14d)、发病率低（小于25%）、病情指数低（小于25）、病斑较小（小于20mm^2)、病斑日均扩展直径慢（小于0.4mm/d)等特点。

Study on the resistance oftea varieties to blister blight

33 tea varieties were tested for resis tance to tea blisterblight caused by Exobasidium vexans Massee. The results showed that no varieties were immune to the disease, but there were different d egrees of susceptibility. Among these varieties, nine varieties such as Taiwanda ye were highly susceptible and nine such as Zhuyeqi were highly resistant, and t he others were mediate resistant to the disease.