霜霉病是广西瓜类作物的主要病害之一,为害西瓜、甜瓜、黄瓜、香瓜、西葫芦、葫芦、节瓜、冬瓜、丝瓜、苦瓜、南瓜、佛手瓜等多种瓜类作物。如不采取有效防治,一般发病情况下,减产一到二成,严重时减产五成以上,甚至失收。霜霉病主要为害叶片,茎、卷须和花梗,幼苗和成株均可发病。成株期叶片受害,初 Downy mildew is one of the main diseases of melon crops in guangxi. It is harmful to melon, melon, cucumber, cantaloupe, zucchini, gourd, gourd, melon, sponge gourd, bitter melon, pumpkin and chayote. In the absence of any effective prevention and control measures, the average incidence of such diseases will be reduced by one to two percent and in the worst case more than 50 percent will be reduced or even lost. Downy mildew is the main damage leaves, stems, tendrils and pedicels, seedlings and adults can be disease. Adult leaves victim, early