成龄橡胶树,冬季是否落叶、落叶多少,与气候条件明显有关,对次年白粉病的危害程度关系也很密切。我们按农业气象的方法,进行了多年的平行观测。本文分析了冬季气温对橡胶树落叶物候期及白粉病病情的关系。 一、橡胶树落叶期 橡胶树(指成龄树,下同)越冬的黄叶、落叶现象期,在景洪地区并不是年年 Adult rubber trees, whether the leaves are deciduous or deciduous in winter are obviously related to the climatic conditions, and are also closely related to the degree of harm caused by powdery mildew in the following year. We conducted many years of parallel observations according to the method of agricultural meteorology. This paper analyzes the relationship between the winter temperature and the phenology of the deciduous leaves of rubber trees and powdery mildew. First, the rubber tree deciduous Rubber tree (referring to the age of trees, the same below) Wintering yellow leaves, deciduous phenomenon period, not in Jinghong area every year