豇豆根腐病菌的生物学特性及室内杀菌剂毒力测定  

Studies on Biological Characteristics and Indoor Fungicides Toxicity Evaluation of Cowpea Root Rot Pathogen

作　　者：杨绍丽[1,2] 吴仁锋[1,2] 杨德枝[1,2] 

机构地区：[1]武汉市农业科学技术研究院 [2]武汉市蔬菜科学研究所,武汉430065

出　　处：《湖北农业科学》2013年第22期5479-5481,5484,共4页Hubei Agricultural Sciences

基　　金：武汉市科技局攻关计划项目(200920322143);武汉市农业科学技术研究院科技创新项目(CX201202)

摘　　要：对引起湖北武汉地区豇豆根腐病的病菌（茄类镰刀菌,Fusarium solani Schl.）进行了生物学特性及室内杀菌剂毒力研究。结果表明,病菌菌丝生长的适宜温度为25~35℃;适宜pH 6~9;光照有利于菌丝生长;病菌能够利用多种碳源和氮源,最适碳源是麦芽糖,最适氮源是硝酸钠;菌丝的致死温度为65℃（10min）。室内杀菌剂毒力测定结果表明,70%甲基托布津超微可湿性粉剂对病菌菌丝抑制效果最好,其后依次为50%硫磺·多菌灵可湿性粉剂和40%福星乳油,这3种杀菌剂均可用于防治豇豆根腐病;80%多菌灵可湿性粉剂和10%苯醚甲环唑水分散粒剂的EC50也较低,也可作为防治豇豆根腐病的杀菌剂。The biological characteristics and fungicides toxicity evaluation of the pathogenic fungus causing cowpea root rot pathogen in Hubei province were studied. The results showed that the optimum temperature for the mycelial growth were 25~ 35 ℃, the optimum pH for mycelial growth were pH 6~9, and light promoted the growth of mycelial. The pathogen could make use of various carbon and nitrogen sources, and the best carbon source was maltose while the best nitrogen source was sodium nitrate. The lethal temperature for mycelial growth was 65 ℃ for 10 min. The results of indoor fungicides toxicity eval- uation showed that the toxicity of 70% thiophanate methyl superfine wettable powder was the strongest to Fusarium solani, followed by 50% sulfur carbendazim wettable powder and 40% Fuxing EC. These 3 fungicides can be used to control cowpea root rot pathogen. The EC50 values of 80% carbendazim wettable powder and 10% difenoconazole were lower than that of oth- er fungicides, which could be used to control cowpea root rot pathogen as well.

关 键 词：豇豆根腐病菌(Fusarium SOLANI SCHL ) 生物学特性 杀菌剂 毒力测定 

分 类 号：S432.44[农业科学—植物病理学] S436.411[农业科学—农业昆虫与害虫防治]