利用大棚种植草莓,棚内高温高湿的环境条件,极有利于各种病虫害的发生。因此,加强对病虫害的综合防治,是实现大棚草莓高产稳产的关键环节。大棚草莓常见病害的防治:叶枯病主要为害叶片、叶柄、果梗、嫩茎和萼片。在叶片上先形成紫褐色、周缘不明显、不规则的斑点,继而扩大成3～4毫米长的不规则病斑,一叶上若发生多个病斑,全叶呈暗色,进而呈黄褐色并枯死。在病斑中有散生小黑点。果梗和叶柄上病斑黑褐色,最初呈斑点状,后扩大成条状。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500-700倍液喷雾,10天后再喷一次,或每亩用70%代森锰锌可湿性粉剂200克加水75公斤喷雾。白粉病主要为害叶片、花、果、果梗、叶柄和匍匐茎。叶片受害,初期叶背出现薄霜状白粉,以后扩展至全株,随着病势加剧,叶片上卷呈汤匙状;花蕾、花瓣受害呈紫红色,不能开 The use of greenhouse cultivation of strawberries, shed high temperature and humidity of the environmental conditions, is very conducive to the occurrence of various pests and diseases. Therefore, to strengthen the comprehensive prevention and control of pests and diseases is to achieve a high yield of strawberries in greenhouse the key link. Prevention and treatment of common diseases of strawberries in greenhouse: leaf blight is the main damage leaves, petioles, fruit stems, tender stems and sepals. The first to form a purple-brown leaves, the periphery is not obvious, irregular spots, and then expanded into 3 to 4 mm long irregular lesions, a leaf on the occurrence of multiple lesions, the whole leaf was dark, yellow and brown And dead. There are scattered spots in the lesion. Fruiting pedicels and petioles on the lesion dark brown, initially spotted, then expanded into a strip. Prevention and treatment measures: timely removal of diseased leaves, old leaves. Early onset with 70% chlorothalonil WP 500-700 times the spray, 10 days after the spray, or with 70% Mancozeb per acre WP 200 grams plus 75 kg of water spray. Powdery mildew is the main damage leaves, flowers, fruit, fruit stems, petioles and stolons. Leaf damage, the early leaves appear thin cream-like white powder, and later extended to the whole plant, with the increasing disease, the leaves on the spoon was spoony; buds, petal damage was purple, can not open