Valsa

常见例句

On Infectious Degree of 25 Species of Poplar by Valsa sordida Nits.
25种杨树感发烂皮病程度的研究。
It is discussed the occurrence and harmfulness of valsa sordida of poplar in 4 aspects.
从4个方面论述了杨树烂皮病的发生规律及危害性。
Cause of occurrence of apple tree valsa canker and its control
苹果树腐烂病发生与蔓延的原因及防治
Studies on Valsa Canker of Armandii Pine and its Control
华山松腐烂病及防治研究
A Study on the Control Index of Valsa Canker of Armandii Pine
华山松腐烂病防治指标的研究
Cause and control of Valsa sordida to poplar young growth in liaoyang region
辽阳地区杨树幼龄林烂皮病发生原因及防治方法