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为了明确黑龙江省几大紫花苜蓿种植区病害的发生种类、分布和危害程度,采用田间调查和室内病原菌鉴定相结合的方法,对黑龙江省苜蓿病害情况进行了初步调查。结果表明:目前在紫花苜蓿生产中大面积发生且危害较重的主要病害有褐斑病和苜蓿小光壳叶斑病;匍柄霉叶斑病、苜蓿春季黑茎与叶斑病、镰刀菌根腐病、炭疽病、苜蓿壳针孢叶斑病、霜霉病、苜蓿锈病等的发生具有明显的地域特点,在发病区域发病率较高;而苜蓿花叶病田间病害程度较轻;白粉病在各种植区域均未见发病。
In order to clarify the occurrence, distribution and damage degree of several large alfalfa planting areas in Heilongjiang Province, a preliminary investigation was made on the diseases of alfalfa in Heilongjiang Province by field investigation and identification of indoor pathogens. The results showed that the main diseases which occurred in large area and seriously harmed the alfalfa production were brown spot and albino leaf spot disease, stump leaf spot disease, alfalfa spring black stem and leaf spot disease, The incidence of root rot, anthracnose, setover leaf spot of Alternanthera philoxeroides, downy mildew, alfalfa rust and so on have obvious regional characteristics and high incidence in the incidence area; while the alfalfa mosaic disease is less disease in the field; Disease in all planting areas were not seen.