元谋县有得天独厚的气候条件，冬季露地能生产番茄。叨年代初期番茄主要病害是早疫病、晚疫病、斑枯病、白粉病等。近年由于品种结构的改变，外引品种增多，新的病害逐渐增加，过去很少发生的叶霉病近年来危害日趋严重，成为目前元谋冬番茄生产上的主要病害之一。两年来我们对 Yuanmou County has unique weather conditions, the winter can produce tomatoes to open. In the early 1940s, the main diseases of tomato were early blight, late blight, spot blight and powdery mildew. In recent years, due to the change of variety structure, the number of introduced species has increased, and new diseases have been gradually increased. In recent years, the occurrence of leaf mold, which rarely occurs in recent years, has become more and more serious. It has become one of the major diseases in the production of tomato in Yuanmou winter. We are right in two years