黄瓜为周年生产的一种高产蔬菜,一般每亩产量可达1—4万斤。但在国内外的生产中,因受几种毁灭性黄瓜病害所侵袭,产量极不稳定,据调查,由于受病害感染可减产30—70％。遇到重病年,甚至造成绝产,严重威胁着黄瓜生产。 50—60年代黄瓜受叶部病害(霜霉、白粉等病害)危害严重,70年代以后随着保护地面积不断扩大,随之带来的土传病害(枯萎、疫病等病害)逐年严重,进入80年代国 Cucumber annual production of a high yield of vegetables, generally up to 1-4 kg per mu yield. However, at home and abroad, the production is extremely unstable due to the attack of several devastating cucumber diseases. According to the survey, it is estimated that 30-70% of the yield can be reduced due to the infection of the disease. Encountered seriously ill, and even cause junk, a serious threat to cucumber production. In the 1950s and 1960s, cucumber was seriously endangered by leaf diseases such as downy mildew and white powder. With the continuous expansion of protected areas after the 1970s, soil-borne diseases (diseases such as blight and blight) 80’s country