一、甜瓜真菌性病害的种类(一)甜瓜病毒病又叫花叶病,小叶病。发病初期,沿叶脉出现深绿平行变色区,叶肉深绿色。一般嫩叶先表现症状,有时在顶端出现几张明显的向正面凸起的深绿色疱斑状畸形花叶,叶小卷缩。茎扭曲萎缩,植株矮小。结果小而少,果实上有花叶状斑纹或凹凸不平。叶柄、果柄及枝蔓上表现为黄褐色、略微凹陷、圆形或不规则长条形病斑。果实受害,开始先在瓜体表面出现许多近圆形或不规则 First, the types of melon fungal diseases (a) melon virus disease, also known as mosaic disease, lobular disease. Early onset, appear along the dark green parallel to the discoloration zone, dark green leaves. The general appearance of the first symptoms of young leaves, and sometimes appear in the top of several prominent to the positive raised dark green blister spot deformity mosaic leaves small curled. Stem twisting atrophy, plant short. The results are small and few, the fruit has mosaic markings or uneven. Petiole, stalk and branches show on the performance of brown, slightly concave, round or irregular long strip lesions. Fruit victims, the first surface of the body appeared in the first lot of nearly circular or irregular