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
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