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栎树猝死病(SOD)已在美国及欧洲等地持久地、大规模爆发,对当地森林生态系统和森林经济造成重大影响.栎树猝死病的主要寄主植物在中国都有广泛的分布,中国的气候条件也适合该病菌的发生与扩散.选取云南省作为中国典型研究区,分别针对EU与NA病菌谱系,考虑国外SOD发生地的病菌传播机制,在空间信息技术获取的环境因子支持下,构建病菌在云南省的时空传播模拟模型,研究假设栎树猝死病菌入侵后,病菌在云南省的时空传播规律.研究表明:NA谱系产生孢子的接触率和感染面积均高于EU谱系;两种谱系的模拟结果都较好地与在爆发地的监测数据吻合;分析表明如果栎树猝死病菌侵入中国,对感染栎树猝死病菌的寄主采取防治措施的时间应在4月之前.
The sudden death of oak disease (SOD) has been in the United States and Europe, lasting large-scale outbreak, the local forest ecosystems and forest economy have a significant impact on the main host plant oak sudden death disease has a wide distribution in China, China Is suitable for the occurrence and spread of this bacteria.We selected Yunnan Province as a typical study area in China, and focused on the phylogenetic relationship of EU and NA pathogens respectively, taking into account the pathogen transmission mechanism of SOD in foreign countries, supported by the environmental factors obtained by spatial information technology, The spatiotemporal propagation model of germ in Yunnan Province was established to study the spatiotemporal propagation of germs in Yunnan after the invasion of sudden death of oak trees.The results showed that the contact rate and area of spores in NA lineages were higher than those in EU lineages, Pedigree simulation results are in good agreement with the monitoring data at the outbreak. Analysis shows that if the sudden death of oak trees invades China, the time to take control measures for the host infected with the sudden death of oak trees should be before April.