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采用重点调查和定点定期系统调查的方法对新疆苜蓿褐斑病的发生及危害进行了研究。结果表明，苜蓿褐斑病在北疆严重发生或中度发生，在南疆地区轻度发生。春季返青和各茬苜蓿刈割后１７～２２ｄ，田间陆续开始发病。夏、秋季发病较重，发病盛期从７月中旬到９月下旬。重病田提前刈割可有效地延缓病情的发展，降低产量损失。
The occurrence and damage of alfalfa leaf spot in Xinjiang were studied using the methods of key survey and fixed-point regular systematic investigation. The results showed that alfalfa leaf spot occurred seriously or moderately in northern Xinjiang and mild in southern Xinjiang. After returning to spring and stubble alfalfa spring 17 ~ 22d, the field began to gradually onset. Severe onset in autumn and autumn, the peak incidence from mid-July to late September. Severe disease early cutting can effectively delay the development of the disease and reduce the yield loss.