6种杀菌剂对不同桉树焦枯病病原菌的室内毒力测定  

Laboratory Toxicity of Six Fungicides to Pathogens Cause Eucalyptus Leaf Blight Pathogens

作　　者：李国清[1] 陈帅飞[1] 刘菲菲[1] 周旭东 谢耀坚[1] 

机构地区：[1]国家林业局桉树研究开发中心,广东湛江524022 [2]富优基尼生物技术(上海)有限公司,上海200235

出　　处：《桉树科技》2014年第2期1-9,共9页Eucalypt Science & Technology

基　　金：广东省林业科技创新专项―桉树重大病虫害控制技术研究与示范(2010KJCX015-03);广东省自然科学基金―广东桉树焦枯病及无性系选择研究(10145624536-400000);国家国际科技合作专项项目―重要林业病害致病力及多样性研究(2012DFG31830)

摘　　要：由丽赤壳属(Calonectria)真菌引起的桉树焦枯病是桉树世界范围内的重要病害之一。为了筛选能有效抑制丽赤壳属病原菌的杀菌剂,本研究采用6种杀菌剂(百菌清、代森锰锌、多菌灵、甲基硫菌灵、嘧菌酯、咪鲜胺)对5种桉树丽赤壳属病原菌(Ca.cerciana、Ca.crousiana、Ca.fujianensis、Ca.pauciramosa、Ca.pseudoreteaudii)通过菌丝生长法测定其室内毒力强弱。结果显示:6种杀菌剂对5种丽赤壳属病原菌均有一定的抑制作用,且差异显著。不同杀菌剂对同一丽赤壳属病原菌的抑制效果差异显著,不同丽赤壳属病原菌对同一杀菌剂的敏感性也存在差异。综合比较分析,咪鲜胺能有效发地抑制本研究中测定的丽赤壳属病原菌菌丝生长。Eucalyptus leaf blight caused by Calonectria spp. is one of the most significant diseases of Eucalyptus worldwide. In order to select effective fungicides to control the diseases caused by Calonectria spp. the toxicities of 6 fungicides （thiophanate-methyl, carbendazim, mancozeb, chlorothalonil, prochloraz, and azoxystrobin） to 5 Calonectria species （C. cerciana, C. crousiana, C. fujianensis, C. pauciramosa and C. pseudoreteaudii） were tested by evaluation of mycelial growth post application. All 6 fungicides inhibited mycelial growth of the 5 Calonectria species but to significantly different degrees. The inhibiting effect of different fungicides to the same species of Calonectria also proved significant, and differences were also found in the sensitivity of different Calonectria species to the same fungicide. In general, the fungicide prochloraz proved most efficient for inhibiting mycelial growth of the 5 Calonectria species tested.

关 键 词：桉树 焦枯病 丽赤壳属 杀菌剂 毒力测定 

分 类 号：S763.15[农业科学—森林保护学]