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杨树大斑型溃疡病是杨树的一种危险性病害,在比利时、西班牙、德国、捷克、波兰、保加利亚、南斯拉夫、黄国、加拿大、土耳其、阿根廷等国普遍发生,危害严重。该病在欧洲和北美危害已有几十年历史,在欧洲被认为是目前对杨树栽培威胁最大的病害。国外许多学者在关于本病的分布、发生因素、病原形态、生理及防治等都有详细报道。国内对此病未引起重视,自1978年被林业部列为检疫对象以后,才引起一些单位注意。1978年南京林学院在苗圃发现危害合作杨和蒙古杨,苗木已全部消毁。1978—1979年中国林科院林研所与黑龙江省森保所在调查杨水疱溃疡病过程中,在辽
Poplar Large-spotted ulcer disease is a dangerous disease of poplar and it has been widely reported in Belgium, Spain, Germany, the Czech Republic, Poland, Bulgaria, Yugoslavia, the Yellow Kingdom, Canada, Turkey and Argentina. The disease has been in jeopardy for decades in Europe and North America and is considered to present the greatest threat to poplar cultivation in Europe. Many foreign scholars in the distribution of the disease, the occurrence of factors, pathogen morphology, physiology and prevention are all covered in detail. Domestic attention to this disease has not been, since 1978 by the Ministry of Forestry as a quarantine object, it attracted some units attention. In 1978, Nanjing Forestry College found hazards in the nursery Yang and Mongolian poplar, seedlings have all been destroyed. 1978-1979 Forest Research Institute of China Academy of Forestry and Heilongjiang Province Forest Inspectorate Yang blister ulcer disease in the investigation process, in Liaoning