黄瓜属于喜温好光蔬菜,冬季极易发生如下病虫害:一、冷害开花结果期的黄瓜在白天25~29℃,晚上18~22℃时生长最好。当早晨发现黄瓜叶片下垂,叶片周缘有皱纹,甚至叶片较长,缺刻深的时候,说明黄瓜已经受到低温的影响了;如果温度突然大幅下降,对黄瓜的打击更大,往往会出现叶片呈水渍状暗绿色。长时间的低温,还 Cucumber belongs to the thermophilic good vegetables, the winter pests and diseases are prone to the following: First, the chilling injury flowering cucumber during the day 25 ~ 29 ℃, 18 ~ 22 ℃ at night when the best growth. When the cucumber leaves were drooped in the morning and there were wrinkles around the leaves and even the leaves were long and the notch was deep, the cucumber had been affected by the low temperature. If the temperature suddenly dropped drastically, the cucumber was hit harder, Stains dark green. Long time of low temperature, also