摘要
通过对14年生杨树评比林的调查,将25种杨树的烂皮病发生程度分成5级,其中Ⅴ级最重,从而明确了各杨树品种感发烂皮病的程度,筛选出71107、742407、银中杨、DN113等为不易感发烂皮病的杨树品种。
Investigating of comparing and assessing forest of 14-year-old poplar, degree of 25 species of poplar infected by Valsa sordida were divided into 5 grade .Among them ,grade V was the most serious.So infectious degree of each variety of poplar were made clear,Poplar which was not easy to infect by Valsa sordida (71107,742407,Populus alba×berolinensis ,DN113)were screened out.
出处
《防护林科技》
2005年第4期28-29,共2页
Protection Forest Science and Technology
关键词
杨树
烂皮病
分级
发生程度
25 species of poplar
Valsa sordida Nits.
grade
