苦瓜白粉病系真菌单丝壳属侵染所致,是大棚苦瓜的主要病害之一。其症状是,先在植株下部叶片的正面或背面长出小圆形的粉状霉斑,逐渐扩大厚密,进而连成一片,发病后期使整片叶布满白粉,后变灰白色,最后使整片叶变成黄褐色干枯。病害从中下部叶片开始发生,并迅速向上部叶片蔓延,造成植株叶片枯黄,果实停止生长,导致减产 该病对湿度适应范围广,大棚内湿度大、天气闷热时病害发展迅速,在植株长势弱或徒长的情况下,也易发生白粉病。 Bitter gourd powdery mildew caused by fungal moniliax infection, is one of the main diseases of greenhouses. The symptom is that firstly, the small round powdery mildew grows on the front or the back of the lower leaves of the plant, and gradually enlarges the thick dense, and then becomes a piece. The late stage of the disease causes the whole leaf to be covered with white powder and then grayish white, finally The whole leaves turn brown dry. Diseases began to occur in the middle and lower leaves, and quickly spread to the upper leaves, resulting in plant leaves yellow, fruit stop growing, resulting in reduced production of the disease to adapt to a wide range of humidity, humidity in the greenhouse, the weather was hot disease developed rapidly, Legitimate circumstances, but also prone to powdery mildew.