许昌是泡桐老产区,不仅大树丛枝病发病率高,而且苗圃地发病率也逐年上升,主要是采用病根育苗和栽植带病苗木所致.为了减少传病,我们于1980-1981年连续二年,将生产所用的种根进行温水浸处,对减轻泡桐苗期丛枝病的发生取得了良好效果.该试验从1980年分别在襄县颖桥公社洪村寺和邢庙两大队、襄县林科所、临颖县台陈公社王曲大队、临颖县林科所等单位进行试验.1980年采用兰考泡桐、白花泡桐经过 Xuchang is the old area of ​​Paulownia, not only the high incidence of brooms, and the incidence of nurseries also increased year by year, mainly the use of diseased seedlings and planting diseased seedlings caused .In order to reduce the transmission, we continued in 1980-1981 Two years, the production of seedlings used for warm water soaking place, to reduce the Paulownia seedling broom disease has made good results.This experiment from 1980 in Xiang County Yingqiao commune Hongcun Temple and Xingmiao two brigades, Xiang County Forestry Branch, Lin Linxian Taiwan Chen commune Wangqu unit, Linying County Linke units and other units to conduct experiments .1980 Emplacement Paulownia, white Paulownia through