四川地区水稻纹枯病菌及其致病力研究  

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

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：《安徽农业科学》2011年第3期1399-1400,1402,共3页Journal of Anhui Agricultural Sciences

基　　金：公益性行业(农业)项目;项目编号:nyhyzx07-049

摘　　要：[目的]研究四川地区水稻纹枯病菌的培养性状及其致病力。[方法]对从四川地区6个水稻主栽点采集的水稻纹枯病样进行分离,将分离所得病菌用PDA培养基培养,记录其培养性状,并对分离得到的23个菌株进行致病力测定。[结果]不同菌株间的生长速率存在显著差异,23个菌株中只有1个菌株生长速率属于中等菌株(40 mm≤Φ≤60 mm),其余都为慢型菌株(Φ<40 mm),无生长速率快的菌株(Φ>60 mm)。致病力测定结果表明,菌株间致病力存在明显的差异,23个菌株中只有1个为强致病力菌株,其余为中等致病力菌株、无弱致病力菌株。[结论]该研究明确了四川地区水稻纹枯病病菌基本生物学特征,为该地区有效控制水稻纹枯病的危害提供了理论依据。[Objective]The paper was to study the cultural characteristic of the pathogen of Rice Sheath Blight（Rhizoctonia solani Kühn）and its pathogenicity in Sichuan regions.[Method]The samples of rice sheath blight collected from six main rice culture points in Sichuan regions were separated,then 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 moderate strain（40 mm≤Φ≤60 mm）,the rest were all slow-type strains（Φ40 mm）,and there was no strain with fast growth rate（Φ60 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.[Conclusion]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：水稻 纹枯病菌 致病力 

分 类 号：S435.111.42[农业科学—农业昆虫与害虫防治]