泡桐丛枝病是由病根带毒传染并使泡桐近年来普遍发病的主要原因之一。据资料介绍,采用温水浸根、抗生素浸根以及化学药剂浸报等方法对病根失毒处理,可有效地预防或减轻丛枝病对苗木和幼树的危害。 1984年我所根据中国林科院林研所泡桐组组织全国良种协作研究的要求,向有关省引进了91个无性系3,000多根种根,进行区域性扩大试验。为了减轻丛枝病的危害,根据《泡桐研究》一书介绍,认为用40—55℃温水浸报20分钟,可有效的防治丛枝病的发生。而我们选用了50°C水温,浸报15分钟,浸后凉干,隔一星期埋根育苗时发现,种根皮层已腐烂变质,绝大部分失去了发芽能力。为了查明原因,1985—1986年连续两年 Paulownia witches broom disease is caused by infection with the root cause of poisoning and Paulownia common incidence in recent years, one of the main reasons. According to the information, using warm water soaking roots, antibiotics immersing roots and chemical immersion methods to treat the diseased roots can effectively prevent or reduce the damage of the brooms to seedlings and saplings. In 1984, according to the requirements of the Chinese Academy of Forestry Forest Research Institute Paulownia Group collaborating on the national thoroughbred research, we introduced more than 3,000 root systems of 91 clones to the provinces concerned to carry out regional expansion experiments. In order to reduce the damage of the birch disease, according to “Paulownia study” a book introduction, that with 40-55 ℃ warm water soaked for 20 minutes, which can effectively prevent the occurrence of the broom. And we chose the water temperature of 50 ° C, soaking for 15 minutes, dipping and drying, burying rooting every other week found that the root cortex has been rotten metamorphosis, the vast majority lost the ability to germinate. In order to identify the reasons, 1985-1986 for two consecutive years