嫁接是防治瓜类作物土传病害的重要技术,目前生产上常用南瓜作为嫁接用砧木,南瓜具有生长旺盛、根系发达、吸肥能力强、抗病性好等优良特性,因此,用南瓜砧木嫁接可使瓜类作物抗枯萎病、耐低温、优化品质、增加产量。然而,近几年调查发现,南瓜砧木的种子携带病原菌,引起的细菌性果斑病发生普遍,严重影响了瓜类的种植,经济损失严重。了解其发病规律,并采取相应的综合防治措施,可有效地控制病原菌在嫁接过程中的传播,降低瓜类嫁接作物细菌性果斑病的发生。1发病原因由于种子在制备过程中清洁度较低,或土壤携带病原菌等原因,常使南瓜种子表面或内部残留 Grafting is an important technique to prevent soil-borne diseases of melon crops. At present, pumpkin is commonly used as a rootstock for grafting. Pumpkin has the characteristics of strong growth, developed root system, strong absorption capacity and good disease resistance. Therefore, Can melon crops wilt resistance, low temperature, optimize the quality and increase production. However, in recent years, the survey found that the seeds of pumpkin rootstocks carry pathogens, which cause widespread occurrence of bacterial fruit spot and severely affect the planting of melons, resulting in serious economic losses. Understanding of its pathogenesis, and take the appropriate comprehensive prevention and control measures, which can effectively control the spread of pathogens in the grafting process, reducing the occurrence of bacterial fruit spot disease melon grafted crops. A cause of the disease due to the preparation of the seeds in the process of low cleanliness, or soil-borne pathogens and other reasons, often pumpkin seeds surface or internal residues