论文部分内容阅读
苜蓿锈病的转主寄主——乳浆大戟，是我国北方苜蓿种植区的常见杂草之一。有锈病发生的苜蓿地内及附近的乳浆大戟，常常受到锈菌侵染，其感染率大约２０％左右。感染苜蓿锈菌的乳浆大戟是我国北方苜蓿早期发病的初侵染来源。５月中旬，在呼和浩特地区感病的乳浆大戟上可见锈孢子产生，６月上旬感病乳浆大戟附近的苜蓿植株开始发病。室内接种试验证明，乳浆大戟上的锈孢子，可以引起苜蓿发病，其潜育期８～９天。铲除苜蓿田内及附近的大戟属植物，应是我国北方苜蓿锈病综合防治的重要措施之一。
The main host of alfalfa rust - Escherichia coli, is one of the common weed in alfalfa planting areas in northern China. There are rust rust alfalfa and the nearby spore Euphorbia, often infected with rust, the infection rate of about 20%. Infected alfalfa rust of Euphorbia is the early incidence of alfalfa northern China in the early source of infection. In mid-May, rust spores were found on the infected eustachian tuberculosis in Hohhot. In early June, the alfalfa plants near the infected estrogen and echinacea began to develop. Indoor inoculation test shows that rust spores Euphorbia can cause alfalfa incidence, the incubation period of 8 to 9 days. Eradication of alfalfa in and near the Euphorbia plants, should be comprehensive control of alfalfa rust in northern China one of the important measures.