反季节保护地栽培的黄瓜,因轮作换茬周期短,病害严重,如黄瓜枯萎病平均发病率在30%左右,枯萎病菌在土壤中能存活3～4年,连作3年以上的温室大棚中,黄瓜枯萎病发病率可达50%～90%。南瓜和黄瓜同属葫芦科,南瓜根系发达,有极强的抗病能力,尤其对根际传染的土传病害和疫病具有高度抗性,对黄瓜枯萎病病菌几乎免疫,因此,用南瓜和黄瓜进行嫁接,南 Cucumbers cultivated in reverse season protected areas have a short period of crop rotation and serious diseases such as the average incidence of cucumber wilt is about 30%, Fusarium oxysporum can survive in soil for 3 to 4 years, even for 3 years in greenhouse , The incidence of cucumber wilt up to 50% to 90%. Pumpkin and cucumber belong to Cucurbitaceae. Pumpkin has well-developed root system and strong resistance ability to disease. In particular, it is highly resistant to soil-borne diseases and epidemics of rhizosphere infection and almost immune to pathogen of cucumber wilt disease. Therefore, with pumpkin and cucumber Grafting, South