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作 者 ：王莉,李宝聚,石延霞

期 刊 ：生态学报 2005年 25卷 4期 页码：808~813

关键词：微环境；酸碱度；黄瓜；真菌病原菌；

Keywords:microenvironment, acid-alkali, pathogen,

摘 要 ：以引起黄瓜灰霉病(Botrytis cinerea)、黑星病(Cladosporium cucumerium)、霜霉病(Pseudoperonospora cubensis)的3种真菌病害病原菌为代表,通过对病菌栖息微环境酸碱度的调节,达到控制病害的目的。研究看出,黄瓜的3种主要病害病原菌在p H=3.4～10 .4间孢子萌发和致病力表现基本一致:偏酸性环境(p H=4 .2～6 .2 )促进孢子萌发率和致病力增强而偏碱性环境(p H=7.5～10 .4 )则对其明显抑制;降低叶面微环境的酸度,大大减轻了病害的发生、扩展,特别是对黄瓜灰霉病菌的防治有明显效果。

Abstract:The microecological theory was combined with the basic principles of plant pathology, three major pathogens: Botrytis cucumber, Cladosporium cucumerium and Pseudoperonospora cubensis of cucumber were studied in the paper. The pathogen populations could be changed effectively by regulating the acidity in the microecology, thus various pathogens were controlled in the same microecological system. The influence of buffer solutions of different pH 3.4～10.4 on plant, conidia or sporangia and the pathogenicity of...

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