摘要
采取肉眼观察、病斑解剖和物候特征观测的方法研究黑杨派杨树辽育3号、108杨和中辽1号烂皮病的早春病斑症状。结果表明:3个杨树品种在早春均可观察到烂皮病的发病症状,且在病斑的表现上具有一定的差异,不同时期症状也不同。3个杨树品种在4月中下旬均可见到韧皮部黑色坏死或深棕色坏死,且108杨和中辽1号发生丝状腐烂现象。烂皮病病斑在韧皮部的坏死范围均要大于病斑表面的坏死范围。不同时期叶芽和嫩枝颜色的变化可作为鉴别病害发生时期的物候特征。
The author observed the symptoms of Cytospora canker on P בLiaoyu- 3',P. × canadensis‘Guariento 'and P × canadensis‘zhongliao1 'of Sect. Aigeiros in Populus with naked eyes,tissue dissection and phenological appearance. The results showed that symptoms of Cytospora canker can be observed on the three varieties in early spring,and they are different in different infected spots and in different periods. The phloem exhibited black or dark brown necrosis on the three varieties in mid to late April,only P. × canadensis‘Guariento 'and P. × canadensis‘zhongliao1 'appears filamentous decay. The coverage of phloem necrosis was larger than that of epidermal necrosis. The germinating time of leaf and the color of newtwig can be used as the phenological characteristics to identify the disease.
作者
刘巍
蔄胜军
高国平
和敬渊
侯庚
LIU Wei et al(Poplar Institute of Liaoning Province, Gaizhou 115213, China)
出处
《中国森林病虫》
北大核心
2016年第5期12-16,共5页
Forest Pest and Disease
基金
辽宁省科技攻关项目(2011207002)资助
关键词
黑杨派
杨树烂皮病
早期症状
病斑解剖
物候特征
black poplar group
Cytospora canker
early symptom
infected tissue dissection
phenological characteristics