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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (10): 277-281.doi: 10.11924/j.issn.1000-6850.2012-0597

所属专题： 园艺

• 林学 园艺 园林 • 上一篇    下一篇

梨树腐烂病在香梨树体上的空间分布特点

吴芳 刘红霞 侯世星 温俊宝   

  • 收稿日期:2012-02-27 修回日期:2012-03-02 出版日期:2012-04-05 发布日期:2012-04-05
  • 基金资助:

    香梨优斑螟与梨树腐烂病种间关系及其相互作用机制

Spatial Distribution Characteristics of Valsa Canker on Fragrant Pear

  • Received:2012-02-27 Revised:2012-03-02 Online:2012-04-05 Published:2012-04-05

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摘要：

为了给香梨树上梨树腐烂病制定有效的调查方法和防治措施提供依据，调查研究了梨树腐烂病在新疆阿克苏地区和库尔勒市香梨树的危害情况及其在树体上的空间分布特点。结果表明：香梨园中梨树腐烂病病株率达100%，其发病程度与梨园的管理水平密切相关。梨树腐烂病在香梨树主干上较少发生，发病率仅1.02%。香梨树不同轮枝（一轮枝、二轮枝、三轮枝）的病斑数、枯枝数差异均极显著；在不同方位（东、西、南、北）上病斑数、枯枝数差异均不显著；在主枝和侧枝上病斑数差异极显著，枯枝数差异不显著；在枝条阴面和阳面病斑数差异极显著。梨树腐烂病主要发生在香梨树的第一轮枝，随着轮枝数的增加，病斑数和枯枝数均显著减少；在香梨树不同方位分布差别不大；其危害部位主要集中在主枝和侧枝，主枝发病较侧枝严重，枝条的阴面较阳面严重。

关键词: 淋洗, 淋洗

Abstract:

In order to provide reference basis for developing effective investigation methods and prevention measures to be used on Valsa canker of fragrant pear tree, the author analyzed the damage and spatial distribution characteristics of Valsa canker on fragrant pear tree body in Korla and Aqsu, Xinjiang. The results showed that disease incidence was nearly 100% and also the occurrence degree of this disease was related closely with the management level of pear orchards. Disease incidence of Valsa canker on the trunk of pear was lowest, only 1.02%. The variance analysis in the number of scar and deadwood indicated that there were extremely significant differences among different wheel branches (the first, second, third branches), no differences among different direction (east, west, south, north). For the main branches and lateral branches, the number of scar had extremely significant differences, the number of deadwood showed no difference. The number of scar on both sides of twigs (the shaded and exposed side) had extremely significant differences. This disease occured mainly on the first wheel branches of peer. With increasing in the number of wheel branches, the number of scar and deadwood was significantly reduced. The occurrence degree of Valsa canker had no differences in different direction. The main harmful parts concentrated on main branches and lateral branches, especially the main branches. This disease occurred on the shaded side more serious than the exposed side of twigs.