广南县杉木三种侵染性病害病原鉴定  

Pathogen identification of three infectious diseases of Chinese fir in Guangnan county

作　　者：韩雨庭 唐婕 尼玛此姆 马焕成 伍建榕[1,2] HAN Yuting;TANG Jie(Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province,College of Biodiversity Conservation,Southwest Forestry University,Kunming650224,China)

机构地区：[1]云南省高校森林灾害预警控制重点实验室,西南林业大学生物多样性保护学院,云南昆明650224 [2]西南地区生物多样性保育国家林业和草原局重点实验室,西南林业大学林学院,云南昆明650224

出　　处：《中国森林病虫》2021年第5期1-8,共8页Forest Pest and Disease

基　　金：国家自然科学基金项目“墨兰菌根真菌多样性与根腐病发生的抑病机理研究”(31860208,31560207);国家重点研发计划“主要经济作物重要及新成灾病害绿色综合防控技术”(2019YFD100200X);省级创新团队项目“木棉纤维人工林产业化培育”(2018HC014)

摘　　要：为明确云南省广南县杉木Cunninghamia lanceolata侵染性病害的病原菌种类,对病组织进行分离获得病原菌,通过柯赫氏法则进行验证,结合形态特征和系统发育树进行鉴定,并进行复合侵染试验。结果表明:广南县杉木3种主要的侵染性病害分别为杉木炭疽病、杉木赤枯病和杉木落针病,其病原真菌依次为暹罗刺盘孢Colletotrichum siamense、小孢拟盘多毛孢Pestalotiopsis microspo-ra和杉叶散斑壳Lophodermium uncinatum。复合侵染的病斑比单独接种的扩展速度更快,且C.siamense的致病力比P.microspora的强。3种侵染性病害的病原菌种类和致病性测定,可为病害防治及抗病育种等工作提供科学的理论依据。In order to identify the pathogen species of the infectious diseases of Chinese fir(Cunninghamia lanceolata)in Guangnan county,Yunnan province,the pathogenic fungi were isolated from the disease tissue and verified by Koch′s Rule,the pathogen species were identified by combining morphological characteristics and phylogenetic tree,and the compound infection test was carried out.The results showed that,at present,there were three kinds of infectious diseases on Chinese fir in Guangnan county,including anthracnose of Chinese fir,copper blight of Chinese fir and needle-cast of Chinese fir.The pathogenic fungi that caused the above infectious diseases were Colletotrichum siamense,Pestalotiopsis microspora and Lophodermium uncinatum,respectively.The spread rate of disease spots with mixed inoculation was faster than that with single inoculation,and the pathogenicity of C.siamense was stronger than P.microspora.The determination of pathogen species and pathogenicity of three infectious diseases in Guangnan county provided scientific theoretical basis for prevention and control of infectious diseases and breeding of disease resistance in the later period.

关 键 词：侵染性病害 病原鉴定 复合侵染 杉木炭疽病 广南县 

分 类 号：S763.15[农业科学—森林保护学]