苜蓿黄萎病菌的检疫生物学特性与风险评估

China was free of Verticillium wilt of alfalfa caused by Verticillium albo-atrum .Chinese Plant Quarantine Regulation classifies this disease as List A one that is one of the dangerest quarantine diseases detected for importing plants and plant products in China. This research is the result of the discovery of the disease occurring in some aeras of Xinjing In 1996.The main host range, host specificity, ecological adaptation and spead of the causal organism were studied; the susceptibility of the varieties of alfalfa mainly cultivated in China was determined; the species-specific detection methods of V. albo-atrum was developed, including molecular detection and selective medium detection;the current distribution of Verticillium wilt of alfalfa in China was preliminarily surveyed. On the basis of ISPM (the International Standards in Phytosanitary Measures) in conjunction with the situation of alfalfa cultivation in China, the risk of V. albo-atrum to China was analysed and scientificly assessed through PRA(Pest risk analysis) system initiated by the identification of a pest. At the same time the chief of the research group has been keeping a close communication with the Phytosanitary Service of the Agricultural Department in order to provide scientific references to improve our country's level of quarantine、 monitoring and surveillance, and to reduce the loss caused by the disease as far as possible.

以首次在我国发现的一类进境检疫危险性苜蓿黄萎病菌为对象，研究其生态适应性，并建⒁惶滋匾炝槊舻募觳饧际趵囱芯扛镁拇ヌ匦院臀χ锏木弥匾缘龋灰陨鲜黾煲呱镅匦晕际踔副辏勒沼泄毓首荚蚨云湓谖夜姆缦招宰龀隹蒲拦溃岣呶夜攒俎?黄萎病菌检疫的决策水平，以最大限度地减少该菌的为害损失提供科学依据。