Valsa

常見例句

• On Infectious Degree of 25 Species of Poplar by Valsa sordida Nits.
  25種楊樹感發(fā)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(fā)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(fā)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(qū)楊樹幼齡林爛皮病發(fā)生原因及防治方法
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