雾害雾是初冬常见的一种天气现象。当低层大气中的水汽达到饱和状态时,水汽凝结物悬浮在空中就会形成雾茫茫的天气。阴雾弥漫的天气往往伴随着低温、高湿、寡照,对大棚蔬菜的生长极为不利,且容易诱发各种病虫害,必须切实加强管理。1.保温防冻。雾天要适当增加覆盖物,防止蔬菜受冻。遇到持续阴雾天气,覆盖物要适当晚揭,且揭开后注意观察温度变化。如果稍有下降,应随揭随盖;稍有回升,可以在下午2时以前 Mist fog is a common early winter weather phenomenon. When the water vapor in the lower atmosphere reaches saturation, the water vapor condensate suspended in the air will form a foggy weather. Foggy and foggy weather is often accompanied by low temperature, high humidity, low light, the growth of greenhouse vegetables is extremely unfavorable, and easy to induce a variety of pests and diseases, we must effectively strengthen management. 1. Insulation antifreeze. Fog day to increase the cover to prevent vegetables from freezing. Encountering a continuous foggy weather, cover should be appropriate late exposure, and opened to observe the temperature changes. If slightly decreased, should be with the lid; slightly picked up, can be before 2 pm