在实验室接种的条件下,证实了小麦白粉菌能侵染大麦(品种:“天津1号”;“757”;“矮杆齐”)、鹅观草和燕麦。它在这些植物上所产生的分生孢子,再接种于小麦亦发生正常侵染。接种在大麦“早熟3号”上的菌,能产生出菌丝,但不产生分生孢子。接种在“秦岭黑麦”上的菌只能达到侵入阶段,并且多数的受侵表皮细胞发生明显的过敏性死亡。据试验结果认为,某些野生禾草有可能是小麦白粉病的初侵染来源。 Under laboratory inoculation, it was confirmed that the powdery mildew was able to infect barley (variety: “Tianjin No.1”; “757”; “Dwarf Qi”), goose grass and oats. It produces conidia on these plants, and then inoculated on wheat also occurs normal infection. Inoculated in the barley “precocious 3” on the bacteria, can produce mycelium, but does not produce conidia. Inoculated in “Qinling rye” can only reach the stage of invasion, and most of the invasion of epidermal cells obvious allergic death. According to the test results, some wild grasses may be the source of primary infection of wheat powdery mildew.