前言 杨树广泛分布于北纬30—72°之间世界各地,因生长快、易繁殖、用途广,适应性强、轮伐期短而极受欢迎。然而,杨树病虫害多且重,其中叶锈病就是分布最广、危害很大的叶病之一。1981—1982年,笔者在前人研究的基础上,于黑龙江省防护林研究所以青杨锈病为对象,进行了深入研究,现将病原菌的生活史及其生物学特性、寄主范围、夏孢子的越冬及其侵染途径和化学防治试验的研究结果报道如下。 Introduction Poplar widely distributed in the latitude 30-72 ° between the world, due to rapid growth, easy breeding, wide use, adaptability, short rotation and very popular. However, poplar pests and more and heavy, of which leaf rust is the most widely distributed, one of the most harmful leaf disease. From 1981 to 1982, on the basis of previous studies, the author conducted an in-depth study on the Qingyang rust disease in the Institute of Shelterbelt, Heilongjiang Province. Now, the life history of the pathogen and its biological characteristics, host range, overwintering of summer spores And its invasion and chemical control test results reported below.