| 华北区玉米、高粱、谷子纹枯病病原学的初步研究 |
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| 引用本文： | 高卫东.华北区玉米、高粱、谷子纹枯病病原学的初步研究[J].植物病理学报,1987,17(4):247-251. |
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| 作者姓名： | 高卫东 |
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| 作者单位： | 山西农业大学 |
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| 摘 要： | 玉米,高粱和谷子纹枯病在华北地区发生极为普遍,并日趋严重。作者从该区采集作物病组织,进行丝核菌分离、鉴定和致病性测定,从玉米上得到77个丝核菌分离物,分属立枯丝核菌(Rhizoctonia solani)中的AG-1-IA (68.8%) AG-1-IB,AG-3,AG-5等菌丝融合群(AGs)和禾谷丝核菌(R.cerealis)中的CAG-3,CAG-6,CAG-8,CAG-9,CAG-10等菌丝融合群,(CAGs).从高粱上得到26个分离物,分属AG-1-IA(77%),AG-4和AG5.谷子上得到30个分离物,分属AG-1-IA (80%)。和AG-4。另外从莠子上得到3个分离物,分离AG-1-IA和AG-4。主要融合群在不同作物和地理上有一定的一致性.致病性测定表明,AG-1-IA的分离物对寄主作物有极强的致病性,但分离物间的差异明显,AG-5的分离物对高粱致病力较强,CAG-10的分离物对玉米有较强的致病力,其余各融合群的分离物致病力均较弱。
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STUDIES ON ETIOLOGY OF SHEATH BLIGHT OF MAIZE,SORGHUM AND MILLET IN NORTH CHINA |
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| Gao Weidong.STUDIES ON ETIOLOGY OF SHEATH BLIGHT OF MAIZE,SORGHUM AND MILLET IN NORTH CHINA[J].Acta Phytopathologica Sinica,1987,17(4):247-251. |
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| Authors: | Gao Weidong |
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| Institution: | Shanxi Agricultural University |
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| Abstract: | 136 isolates of Rhizoctonia spp.were gained from diseased tissues of sheath blight in maize,sorghum,millet and green bristlegrass from 18 counties in North China.According to the anastomosic characteristic of Rhizoctonia,77 maize isolates were incorporated into nine groups,which were AG-1-IA(68.8%),AG-1-IB,AG-3,and AG-5 in R.solani and CAG-3,CAG-6,CAG-8,CAG-9,and CAG-10 in R.cerealis.Three Anastomosis Groups were summed up from 26 sorghum isolates,i.e.AG-1-IA(77%),AG-4,and AG-5;Only two AGs,AG-1-IA(80%) and AG-4 existed in 30 millet isolates.Three isolates were come from green bristlegrass,belonging to AG-1-IA and AG-4 respectively.AG-1-IA,the main type of Rhizoctonia spp.were more consistently distributed geographically.The pathogenicity of some representative isolates from three crops and different AGs (or CAGs) to thier respective hosts in greenhouse were tested.Some isolates in AG-1-IA had the strongest pathogenicity,but others were less pathogenic.Isolates in AG-5 were also the most pathogenic to sorghum and those in CAG-10 had greater pathogenicity. |
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