通过室内和田间人工接种苜蓿锈病病原物，观察苜蓿锈病的寄主范围。研究表明，苜蓿锈病的寄主除苜蓿属的植物外，扁蓿豆属的扁蓿豆、三叶草属的白三叶草、野火球等均是该病原锈菌的夏孢子的寄主，大戟属的乳浆大戟是苜蓿锈菌的转主寄主。扁蓿豆、野火球是国内外未见报道的新寄主，乳浆大戟是国内尚未见报道的转主寄主。 The indoor and field artificially inoculated with alfalfa rust pathogens observed alfalfa rust host range. The results showed that the host of alfalfa rust, besides the plants of alfalfa, the alfalfa alfalfa, the white clover and the wild fireball of alfalfa, were the host of the summer spores of the pathogenic rust, Euphorbia is the main host of alfalfa rust. Medicago bidentata, wild fireball is a new host not reported at home and abroad, Escherichia coli is the main host has not yet been reported.