近年来,京郊保护地黄瓜种植面积不断扩大,病害为害越来越严重。这主要是:保护地是固定型的,一般不能轮作倒茬。另外,保护地温度高湿度大,适宜病害越冬和繁殖。根据我们调查,京郊保护地黄瓜主要病害有:霜霉病、白粉病、枯萎病,炭疽病等。现将症状发生规律及防治方法简介如下。 In recent years, the area under cucumber cultivation in the suburbs of Beijing has been constantly expanding, and the disease has become more and more serious. This is mainly: the protected area is of a fixed type and generally can not be rotated by turns. In addition, the protection of high temperature and humidity, suitable for disease overwintering and breeding. According to our investigation, the major diseases of cucumber in the protected areas in Beijing include: Downy mildew, Powdery mildew, Fusarium wilt, Anthrax and so on. Now the law of occurrence of symptoms and prevention methods are as follows.