杨树是河南主要速生树种之一。主要树种有毛白杨、加拿大杨、大关杨、美杨、小叶杨、箭杆杨、辽杨、青杨、银白杨、响叶杨、山杨等十余个树种。1955年以来,我们曾到豫东、豫西及豫南等地20个县市,进行了杨树病害种类、分布、危害情况调查,对主要病害的流行规律和防治措施作了一些观察和防治试验。现汇综简报如后,并附有26种病害的症状和病原菌图,供参考。 Poplar is one of the main fast-growing tree species in Henan. The main tree species are poplar, Canadian poplar, poplar Yang, Populus, Populus, arrow stem Yang, Liaoyang, Populus, poplar, ring poplar, aspen and more than ten species. Since 1955, we went to 20 counties and cities in eastern Henan, western Henan and southern Henan to conduct a survey on the species, distribution and damage of poplar trees. Some observations and prevention measures have been made on the epidemic rules and prevention measures of major diseases test. Is summarized after the summary, and accompanied by 26 kinds of disease symptoms and pathogenic bacteria map, for reference.