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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斑点,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。防治对策:及时摘除病叶、老叶。发病初期用70%百菌清可湿性粉剂500倍～700倍液,十天后再喷一遍。或用70%代森锰锌可湿性粉剂,每667平方米200克对水75千克进行喷雾。白粉病,主要为害叶片,也侵害花、果、果梗和叶
Leaf spot disease, also known as snake eye disease, the main damage leaves, petiole, fruit stems, tender stems and seeds. The formation of small dark purple spots on the leaves, expanded to form a nearly circular or oval lesions, the edge of purple-brown, the central gray, slightly thin round, so that the entire lesion snake-like, lesion does not form small black particles. Prevention and treatment measures: timely removal of diseased leaves, old leaves. In the early stage of the disease, it was sprayed with 500 times to 700 times of 70% chlorothalonil WP, spray again ten days later. Or with 70% Mancozeb WP, 200 grams per 667 square meters 75 kilograms of water spray. Powdery mildew, the main damage leaves, but also against flowers, fruit, fruit stems and leaves