云南省玉米灰斑病发生规律研究  

Epidemic of Gray Leaf Spot of Maize in Yunnan Province

作　　者：周惠萍[1] 吴景芝[1] 李月秋 赵文华 肖文祥 吴毅歆[5] 何月秋[1,5] 

机构地区：[1]云南农业大学生物多样性持续控制病虫害应用技术工程中心,云南昆明650201 [2]大理州植保植检站,云南大理671000 [3]红河州植保植检站,云南蒙自661100 [4]保山市植保植检站,云南保山678000 [5]云南农业大学农学与生物技术学院,云南昆明650201

出　　处：《西南农业学报》2011年第6期2207-2212,共6页Southwest China Journal of Agricultural Sciences

基　　金：云南省支撑计划项目(2006NG19);云南省农业产业技术体系项目

摘　　要：灰斑病是云南省玉米叶部病害之一,严重地制约着玉米产量。通过田间定点系统调查和人工接种鉴定,证明云南省玉米灰斑病的始发期为6月上旬至7月下旬,在玉米抽雄吐丝至成熟期的8月中旬至9月下旬迅速暴发流行。同一品种随着海拔增高病情加重,特别是在海拔1800 m以上,产量损失最大。海拔1500～1800 m区域次之,海拔1500 m以下区域发病较轻。病原菌主要以分生孢子在地表的病残体上越冬。抗病品种少,中抗以上品种仅15.78%。日平均气温在20℃以上,相对湿度80%以上,有利于病害的发生。提早播期有减轻病害的作用。Gray leaf spot of maize,caused by Cercospora zeae-maydis,became one of the most serious foliar and significant yield-limiting diseases of maize in Yunnan province.According to the field survey and artificial inoculation,the disease occurred from early June to late-July,and became rapidly epidemic in mid-August to late-September with maize tasseling and maturing.Disease severity was different depending on altitudes.The pathogen overwintered in the infected corn residues remaining on the soil surface.The resistant cultivars accounted for only 15.78 %.The average temperature over 20 ℃ and relative humidity over 80 % were favorable for the disease development.Early-planting could reduce the disease severity.

关 键 词：玉米灰斑病 流行规律 云南 

分 类 号：S435.13[农业科学—农业昆虫与害虫防治]