一、叶斑病:又称蛇眼病,主要为害叶片、叶柄、果梗、嫩茎和种子。在叶片上形成暗紫色小班点,扩大后形成近圆形或椭圆形病斑,边缘紫红褐色,中央灰白色,略有细轮,使整个病斑呈蛇眼状,病斑上不形成小黑粒。使用药剂:发病初期用70%百菌清可湿性粉剂500倍～700倍液,10天后再喷一遍,或用70%代森锰锌可 First, leaf spot disease: also known as snake eye disease, the main damage leaves, petiole, fruit stems, stems and seeds. The formation of dark purple leaves on the leaves point to expand the formation of nearly circular or oval lesions, the edge of purple-brown, central gray, slightly thin round, so that the entire lesion was snake-like, lesion does not form a small black tablets. The use of agents: early onset with 70% chlorothalonil WP 500 times to 700 times the liquid spray again after 10 days, or with 70% Mancozeb