摘要
花椒锈病是危及花椒生产的严重病害之一。对西北主要产椒区的调查,其发病率均在60%以上,最高可达90～100%;病情指数一般都达到30～75。病害发生的空间动态符合逻辑斯蒂曲线。病害的发生程度与降雨、花椒品种有关,而与树龄、海拔高度关系不大。该病菌为害叶片、叶轴,引起叶子大量提前脱落,致使椒树再次萌叶。锈菌在花椒上产生夏孢子和冬孢子;冬孢子不经休眠阶段而萌发,萌发最适温度18～25℃。
It is,Proved that pricklyash rust(Coleosporium zanthoxyli Diet.& Syd.) is a dangerous disease by investigating major prieklyash planting-region in nothwesten of China.In this region,the infectious plant rate isusually more than 60%,specially,90～100%,and the disease-index lie usually between 30 and 75.Space dynamic of the disease coincide with Logist curve.The di- sease severity is relative to the varieties of pricklyash,and rainfall;not relative to age of the trees,and elevation of the area where prieklyashes are planted.C.zanthoxyli infects leaves and makes them fall early,which causes buding secondary leaves.The fungus bear urediospores and teliospores on pricklyashes.The teliospores germinate at optimaltemperaturof 18～25℃.
出处
《陕西林业科技》
北大核心
1989年第4期63-65,共3页
Shaanxi Forest Science and Technology
关键词
花椒
锈病
症状
发病规律
pricklyash
rust
severity
pathogenesis rule
