对采自我国和由美、加、日、捷、斯、阿(阿富汗)和前苏联引入的18个种的披碱草,用我国小麦白粉病11个生理小种的混合菌种进行接种,有15个种接种成功.用14份发病披碱草上产生的白粉病菌分别回接小麦,也全部回接成功,说明国外的披碱草和我国的一样具同源性,都属于我国小麦白粉病的寄主范围,具中间寄主传播病菌的潜力.对国外披碱草在疆域接壤的邻国间传播新小种等问题进行了讨论“,”The resistance of eighteen Elymus species,grown in China and introduced from USA,Canada,Japan,Czech,etc to wheat powdery mildew was tested with a mixture of 11 Chinese mildew races in greenhouse.The result showed that 15 species were successfully inoculated by the mildew pathogen.The mildew spores produced on 14 diseased Elymus species plants were collected and inoculated back to the wheat plants.The inoculation was also successful.The infection indicated that Elymus belonged to the wheat mildew host cate...