稻曲病初侵染源及病菌侵染适期初步研究  

Preliminary Studies on Initial Infection Sources and Pathogen-infecting Favorable Stage for Rice False Smut

作　　者：刘见平 唐涛 张松柏 郑和斌[2] 

机构地区：[1]湖南省植物保护研究所,湖南长沙410125 [2]湖南省植保植检站,湖南长沙410005

出　　处：《杂交水稻》2009年第1期74-77,共4页Hybrid Rice

基　　金：国家“十一五”科技支撑计划重大项目(2006BAD02A01);湖南省“十一五”科技重大专项(2006NK1001);湖南省科技厅重大专项资助项目(05NK1005)

摘　　要：2006—2007年针对稻曲病初侵染源及病菌侵染适期进行了田间试验,结果表明:稻曲病初侵染源主要为种子带菌,其次是土壤中越冬的病菌;病菌侵染适期为孕穗中、后期,自然病菌比人工培养病菌致病力更强;破口至齐穗期较多的降雨天气有利于稻曲病发生。The field experiments of initial infection sources and pathogen-infecting favorable stages for rice false smut （ Ustilaginoidea virens） were conducted in 2006 and 2007. The results indicated that infected seeds and the pathogens for hibernation in soil were the initial infection sources for rice false smut, and the former was more important. The medium and late booting stages were the favorable infecting period of the pathogens of Ustilaginoidea virens, and the naturally-collected pathogens had a greater pathogenicity than the artificially-cultured pathogens. The rainy days and rainfall from panicle emerging stage to full heading stage were favorable conditions for outbreak of rice false smut in medium and late rice.

关 键 词：水稻 稻曲病菌 初侵染源 侵染适期 

分 类 号：S432.4[农业科学—植物病理学] S511[农业科学—农业昆虫与害虫防治]