论文部分内容阅读
西瓜蔓枯病又叫黑腐病、斑点病、朽根病,危害叶片、茎蔓、果实等,以叶片受害最重。 发病症状 叶片感病最初出现黑褐色小斑点,后逐渐变成直径为1—2厘米的病斑,病斑后期散生小黑点,病叶干枯时呈星状破裂。连阴雨天气,病害迅速发展至全叶,叶片变黑枯死。蔓枯病与炭疽病症
Watermelon is also known as black rot disease, spot disease, root rot disease, endangering leaves, stems and vine, fruits, etc., to the leaf damage the most. Morphological symptoms of the initial emergence of small dark brown spots, and gradually become a diameter of 1-2 cm of the lesion, lesion scattered black spots later, the diseased leaves were dry star-shaped rupture. Even the rainy weather, the rapid development of disease to the whole leaf, the leaves become black dead. Bacterial blight and anthrax disease