Valsa

常见例句

On Infectious Degree of 25 Species of Poplar by Valsa sordida Nits.
25種楊樹感發爛皮病程度的研究。
It is discussed the occurrence and harmfulness of valsa sordida of poplar in 4 aspects.
從4個方麪論述了楊樹爛皮病的發生槼律及危害性。
Cause of occurrence of apple tree valsa canker and its control
蘋果樹腐爛病發生與蔓延的原因及防治
Studies on Valsa Canker of Armandii Pine and its Control
華山松腐爛病及防治研究
A Study on the Control Index of Valsa Canker of Armandii Pine
華山松腐爛病防治指標的研究
Cause and control of Valsa sordida to poplar young growth in liaoyang region
遼陽地區楊樹幼齡林爛皮病發生原因及防治方法