瓠瓜细菌性叶斑病是新近发生的一种病害,发生严重时对产量有较大的影响。此病可危害叶片、茎蔓、瓜条,其中以叶片受害较严重。发病规律此病由细菌油菜黄单胞菌黄瓜叶斑病致病变种侵染引起。病菌主要通过种子带菌传播蔓延,该菌在土壤中存活时间非常短,保护地栽培往往重于露地栽培。防治方法①种子处理用55℃温水浸种20分钟,捞出晾干后催芽播种。 Pachyrhizus bacterial leaf spot disease is a recent occurrence, the occurrence of serious cases have a greater impact. The disease can endanger the leaves, stems and grapes, melons, of which the more serious damage to the leaves. Pathogenesis This disease is caused by pathogenic variants of the bacterium Xanthomonas campestrine cucumber leaf spot. Bacteria mainly spread through the seed carrier bacteria, the bacteria in the soil survival time is very short, protective cultivation is often more important than open field cultivation. Control methods ① seed treatment with 55 ℃ warm water for 20 minutes, remove and dry germination sowing.