尖角突脐孢菌在温室环境下侵染稗草的致病体系研究  

Pathogenicity system of Exserohilum monoceras to barnyardgrass in greenhouse

作　　者：杨敏[1] 李健强[1] 倪汉文[1] 王琦[1] 

机构地区：[1]中国农业大学农学与生物技术学院,北京100094

出　　处：《植物病理学报》2007年第2期221-224,共4页Acta Phytopathologica Sinica

基　　金：农业部农业结构调整重大技术研究专项(2003-07-03B);教育部新世纪优秀人才支持计划资助(NCET-04-0128)

摘　　要：The effects of inoculum concentration,leaf stages of host plant,and environmental factors on the infection of Exserohilum monoceras isolate X-27 to barnyardgrass were investigated.The results showed that the lesion was visibly appeared on the leaf when inoculum concentration above 1.00×105 conidia· mL-1,1-2 leaf stage of barnyardgrass was most sensitive for infection of E.monoceras.The data also indicated that dew period was the key factor for E.monoceras infection.Almost 90% of barnyardgrass plants were killed when dew period prolonged to 48 h.Temperature and illumination period did not significantly affect the infection of E.monoceras,25-28℃ and 12 h dark period after inoculation were enough for infection.The effects of inoculum concentration, leaf stages of host plant, and environmental factors on the infection of Exserohilum monoceras isolate X-27 to barnyardgrass were investigated. The results showed that the lesion was visibly appeared on the leaf when inoculum concentration above 1.00× 105 conidia · mL^-1, 1 -2 leaf stage of barnyardgrass was most sensitive for infection of E. monoceras. The data also indicated that dew period was the key factor for E. monoceras infection. Almost 90% of barnyardgrass plants were killed when dew period prolonged to 48 h. Temperature and illumination period did not significantly affect the infection of E. monoceras, 25 -28℃ and 12 h dark period after inoculation were enough for infection.

关 键 词：尖角突脐孢菌 温室环境 稗草 致病 侵染 农产品安全 施药技术 生防因子 

分 类 号：S451[农业科学—植物保护]