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高温可抑制病菌的发育。根据这个原理,晴天中午密闭大棚(棚内挂温度表,其高度与黄瓜生长点平行),使棚温自然上升至生长点处温度达42～45℃,维持2小时,然后放风,慢慢降温。此法可控制黄瓜霜霉病的发生和漫延。处理一次可控制7～10天。如果温度低于42℃,效果不好;高于48℃,黄瓜受害。头一天先灌水,第二天高温闷棚效果更好。但要严格控制好闷棚时间和温度。
High temperature can inhibit the development of germs. According to this principle, sunny day at noon closed greenhouse (shed temperature meter, the height of the cucumber growth point parallel), so that shed temperature naturally rose to the growth point at a temperature of 42 ~ 45 ℃, maintained for 2 hours, and then the wind, slowly cooling . This method can control the occurrence and spread of cucumber downy mildew. Treatment can be controlled for 7 to 10 days. If the temperature is below 42 ℃, the effect is not good; above 48 ℃, cucumber victims. The first day of irrigation, the next day boredom effect better. But to strictly control the boring time and temperature.