Research on the Pathogen of Rice Sheath Blight(Rhizoctonia solani Kühn)and Its Pathogenicity in Sichuan Regions  

四川地区水稻纹枯病菌及其致病力研究(英文)

作　　者：罗霄凤[1] 康晓慧[1] 彭玉娇[1] 张娜[1] 张利[1] 

机构地区：[1]西南科技大学生命科学与工程学院,四川绵阳621010

出　　处：《Plant Diseases and Pests》2010年第6期12-14,19,共4页植物病虫害研究（英文版）

基　　金：Supported by Public Service Sector (Agriculture) Projects (nyhyzx07-049)~~

摘　　要：[ Objective] The paper was to study the cultural characteristic of the pathogen of Rice Sheath Blight （ Rhizoctonia solani Kuhn） and its pathogenicity in Sichuan regions. [ Method] The samples of rice sheath blight collected from six main rice planting areas in Sichuan regions were separated. The separated pathogen of rice sheath blight was cultured on PDA medium, and its cultural characteristic was recorded. Meanwhile, the pathogenicity of the obtained 23 strains was determined. [ Result] The growth rates among different strains had significant difference. According to the growth rate, only one strain belonged to medium strain（colony diameter： 40 mm≤（Ф≤60 mm）, the rest were all slow-type strains （colony diam- eter Ф〈40 mm）, and there was no strain with fast growth rate （colony diameter Ф 〉 60 mm）. Pathogenicity test showed that the pathogenicity among strains was significantly different, only one strain had strong pathogenicity, and the others all had moderate or weak pathogenicity. [ Conclu- sion] The study confirmed the basic biological characteristics of the pathogen of rice sheath blight in Sichuan region, which would provide theoretical basis for effective control of rice sheath blight in the region.[ Objective] The paper was to study the cultural characteristic of the pathogen of Rice Sheath Blight （ Rhizoctonia solani Kuhn） and its pathogenicity in Sichuan regions. [ Method] The samples of rice sheath blight collected from six main rice planting areas in Sichuan regions were separated. The separated pathogen of rice sheath blight was cultured on PDA medium, and its cultural characteristic was recorded. Meanwhile, the pathogenicity of the obtained 23 strains was determined. [ Result] The growth rates among different strains had significant difference. According to the growth rate, only one strain belonged to medium strain（colony diameter： 40 mm≤（Ф≤60 mm）, the rest were all slow-type strains （colony diam- eter Ф〈40 mm）, and there was no strain with fast growth rate （colony diameter Ф 〉 60 mm）. Pathogenicity test showed that the pathogenicity among strains was significantly different, only one strain had strong pathogenicity, and the others all had moderate or weak pathogenicity. [ Conclu- sion] The study confirmed the basic biological characteristics of the pathogen of rice sheath blight in Sichuan region, which would provide theoretical basis for effective control of rice sheath blight in the region.

关 键 词：Rice Rice sheath blight PATHOGENICITY 

分 类 号：S435.111.42[农业科学—农业昆虫与害虫防治]