摘要
采用秋季定期、定点观察法,对107杨等5种杨树的秋季烂皮病发生期、症状解剖及病害对应物侯期进行了研究,结果表明:5个杨树品种均可见发生烂皮病病斑,不同品种的杨树烂皮病病斑发生初始期存在一定的区别,症状亦有一定的差别;病斑上表皮后期均多表现失水、下陷,下表皮层组织均坏死,浅褐色至深褐(黑)色,韧皮组织均坏死,褐色至后期黑色坏死,边材107杨和荷兰64杨正常,其它品种后期坏死暗色;5种杨树叶片脱落在不同病斑发生期存在一定差别,物候特征比较明显。
Observation on autumn emergence period of Valsa sordida, symptom anatomy and disease corresponding to the phenologi- cal period on Populusxeuramericana' Neva' Populus×euramericana' Neva' etc. Five species of Populus by the methods of regular in- tervals and fixed-point observation, the restdts showed that disease spot of Valsa sordida were all observed on five species of Populus, there were some differences and a certain distinction symptom in different disease spot of Valsa sordida initial stage; Disease spots on the skin in later period were all water loss performance, subsidence, tissue under the skin layer were all necrosis from light brown to dark brown,phloem tissue were all necrosis from brown to dark in later period, sapwood were normal both in Populusx ' Neva' and Populus xeuraneticanacL.' 64' ,other species of Populus were necrosis with dead colour in later period; There were some differences in different disease spot emergence period of five species of Populu, the phenological period were obvious.
出处
《辽宁林业科技》
2013年第4期4-8,共5页
Liaoning Forestry Science and Technology
关键词
杨树烂皮病
秋季发生期
症状
解剖
Valsa sordida
autumn emergence period
symptom
anatomy