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本项研究从辽宁省５个市县收集到９３个菌株，经菌丝融合测定均为立枯丝核菌（Ｒｈｉｚｏｃｔｏｎｉａｓｏｌａｎｉ）的ＡＧ１－ＩＡ群，没有发现其它菌群的菌株，说明引起辽宁省玉米纹枯病的病原菌为Ｒ．ｓｏｌａｎｉ的ＡＧ１－ＩＡ菌群．对５个来自不同地区的菌株进行苗期和成株期致病性测定，结果表明：（１）玉米苗期比较抗纹枯病的侵染，病指数大都小于１；（２）不同玉米品种（或品系）对玉米纹枯病存在抗性差异，以沈试２８抗性最强，沈试１８次之，而以沈试２９最感病，辽原１号、掖单１３、丹玉１６次之；（３）不同地区来源的菌株存在致病力差异，以丹东菌株（丹东ＲＳ－９５０１）致病力最强，昌图菌株（ＲＳ－９５０２）次之，其余３个菌株致病力较弱。
In this study, 93 strains were collected from 5 cities and counties in Liaoning Province. All the strains were identified as AG1-IA group of Rhizoctonia solani by mycelial fusion, and no other strains were found, which indicated that Liaoning, Provincial corn sheath blight pathogen R. solani AG1-IA flora. Five isolates from different regions were tested for their pathogenicity at seedling and adult stage. The results showed that: (1) Compared with the control of sheath blight, the disease index was less than 1 in maize seedlings; (2) (Or line) had different resistance to sheath blight of corn. The most resistant to test 28 and the test of 18 were tested, while the most susceptible to test 29, Liaoyuan 1, Yedan 13 and Dan Yu 16 Secondly; (3) The pathogenicity difference of strains from different regions was the strongest. The pathogenicity of Dandong strain (Dandong RS-9501) was the strongest, followed by Chang-chang (RS-9502) Weaker.