１９９１年我国小麦秆锈除四川、河南省局部流行外，其它地区发生较轻，本年度标样来自全国１５个省、市、自治区的４１个县，涉及到９４个小麦品种。经分离，鉴定了菌株１９７份，其中小种２１Ｃ３出现频事为８５．３％，３４为８．７％，３４Ｃ２为４．５％，３４Ｃ１为１．５％；致病类型２１Ｃ３－ＣＫＨ出现频率为５７．４％居首位，其次为２１Ｃ３—ＣＫＲ，为２３．４％。在利用１９７个菌株对４１个Ｓｒ单基因系的毒力频率测定中，没有发现对Ｓｒ９ｃ，１１和２１有毒力对菌株；对Ｓｒ２５，２６，３０，３１，３５和３８的毒力频率均在２％－６％之间，结果与１９９０年相似。 In 1991, except for the epidemic of wheat stalks in Sichuan and Henan provinces, the occurrence of wheat stalks in other areas was mild in other areas. This year, the standard samples came from 41 counties in 15 provinces, municipalities and autonomous regions in the country, involving 94 wheat varieties. After isolating, 197 strains were identified, of which the frequency of occurrence of 21C3 races was 85.3%, 34 was 8.7%, 34C2 was 4.5% and 34C1 was 1.5%. Pathogenic type 21C3-CKH appeared The frequency was 57.4%, followed by 21C3-CKR, which was 23.4%. In virulent frequency determination of 41 Sr single-line strains using 197 strains, no virulence strains against Sr9c, 11 and 21 were found; the virulence frequency of Sr25, 26, 30, 31, 35 and 38 was 2% -6%, with similar results in 1990.