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近年来,内蒙古自治区东部地区和黑龙江省、吉林省西部主要苜蓿栽培地区,都有苜蓿霜霉病发生,而致影响苜蓿种子品质和产草量。据1954年调查严重病区,产草量减产达35—42.7%。因此我们自1983至1986年进行了有关苜蓿霜霉病发病征状。发生规律和综合防治方面的试验和调查工作。同时在内蒙古自治区呼盟和吉林省白城地区进行了有关的田间调查和防治试验。
In recent years, alfalfa downy mildew occurred in the eastern Inner Mongolia Autonomous Region and in the main alfalfa cultivation areas in Heilongjiang Province and western Jilin Province, which affected the quality and yield of alfalfa seeds. According to the 1954 survey of serious ward, yield reduction of 35-42.7%. Therefore, we made the relevant symptoms of downy mildew of clover from 1983 to 1986. Occurrence of law and comprehensive prevention and control of the test and investigation work. At the same time, Inner Mongolia Autonomous Region, Humen and Baicheng area of Jilin Province carried out the relevant field investigation and prevention and control experiments.