保护地黄瓜霜霉病年年发生,为害严重,轻者减产10—20%,重者达30%以上,是保护地黄瓜最重要的病害。保护地黄瓜霜霉病发生的条件是什么呢?根据我们试验的结果:1 病害发生与温湿度黄瓜霜霉病的发生发展与温湿度有密切关系,特别是湿度。孢子囊在5—30℃均可萌发,适温在15—20℃,侵入的温度为10—25℃,最适温度是16—24℃,若低于15℃或高于28℃,不利于病害的发生。高湿是发病 Protected cucumber downy mildew occurs annually, causing serious damage, the light cut 10-20%, severe up to 30% or more, is the most important cucumber disease protection. According to the results of our experiments: 1 Disease occurrence and temperature and humidity The development of cucumber downy mildew is closely related to the temperature and humidity, especially the humidity. Sporangium germination at 5-30 ℃, suitable temperature at 15-20 ℃, invasion temperature of 10-25 ℃, the optimum temperature is 16-24 ℃, if less than 15 ℃ or higher than 28 ℃, is not conducive to The occurrence of disease. High humidity is the incidence