江苏玉米纹枯病菌的菌丝融合群及其对药剂的敏感性  

The Anastomosis Groups and Their Sensitivity to Fungicides of Corn Sheath Blight in Jiangsu Province

作　　者：陈厚德[1,2] 梁继农[1,2] 朱华 赵桂东[1,2] 刘荆 

机构地区：[1]扬州大学农学院植物保护系 [2]江苏省淮阴市农科所

出　　处：《江苏农业学报》1997年第2期94-98,共5页Jiangsu Journal of Agricultural Sciences

基　　金：江苏省"八五"农业重点研究项目

摘　　要：从江苏省玉米主产区的徐州、连云港、淮阴、盐城、南通和扬州市的１９个县（市）的春、夏玉米上，共分离出７５株纹枯病菌株。经菌丝融合群测定，它们属立枯丝核菌（Ｒｈｉｚｏｃｔｏｎｉａｓｏｌａｎｉ）ＡＧ１菌丝融合群中的两个亚群：ＡＧ１－ＩＡ和ＡＧ１－ＩＣ。其中，ＡＧ１－ＩＡ占优势，为分离总菌数的９３．３％。在ＡＧ１－ＩＡ亚群中，来源不同的菌株间对不同药剂的敏感性存在明显差异；Seventy five fungus isolates of corn sheath blight ( Rhizoctonia ) were isolated from summer corn and spring corn in 19 counties of Jiangsu province. Anastomosis tests showed that the 75 isolates belonged to groups AG 1 IA and AG 1 IC of Rh.solani. The AG 1 IA group was predominant, representing 93 3% of all the isolates. There were significant pathogenicity differences among the isolates of the AG 1 IA group. There were also significant differences in sensitivity to three fungicides among different isolates of the AG 1 IA group.The sensitivity of the AG 1 IA group to the fungicide Wenmeijing was the highest, and to the frungicide Jinggang mycin (Validamycin) was the lowest.

关 键 词：玉米 纹枯菌 融合群类型 致病力 药剂敏感性 

分 类 号：S435.131.4[农业科学—农业昆虫与害虫防治]