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杨树花叶病毒病是杨树上的一种新病害,近年来,许多地区陆续发生,并日趋严重,成为我国发展杨树的潜在威胁。我们1979年在林科院杨树苗圃内发现个别杨树品种感有花叶病毒病。1981年5-10月在山东、河南、河北、湖北、湖南、北京等8个省、市30个县的杨树栽培区进行了调查,发现很多地区的许多品种都有此病发生,有的地区发生较严重,对杨树生产威胁较大。现将调查结果报道如下。一、杨树花叶病毒病的症状初期病叶呈点状退绿斑,小斑常聚集成不规则黄绿色花斑,呈花叶,边缘退色发焦,沿叶脉为星状。在老叶上产生扩散斑,叶面透明,发皱变厚,发硬,变小甚至畸形(见图1)。
Poplar mosaic virus disease is a new disease on poplar, in recent years, many areas occur one after another, and more and more serious, become a potential threat to the development of poplar in China. In 1979, we found individual poplar varieties infected with mosaic virus disease in the poplar nursery of the Academy of Forestry. May-October 1981 in Shandong, Henan, Hebei, Hubei, Hunan, Beijing and other eight provinces and 30 counties of poplar cultivation areas were investigated and found that many species in many areas have the disease occurred, and some More serious in the area, the threat to the poplar production. Now the survey results are reported below. First, the symptoms of poplar mosaic virus disease in the early sick leaves were spotted green spots, small spots often gather irregular yellowish green spots, showing mosaic, edge fading hair, along the veins for the star. Diffuse spots are formed on the old leaves, the foliage is transparent, the hair folds thicken, the hair stiffens, the smaller or even deformed (see Figure 1).