作　　者： ;

机构地区： 岳阳职业技术学院

出　　处： 《中国森林病虫》 2003年第5期6-9,共4页

摘　　要： 通过田间系统观察和发病高峰期的取样调查发现 :气候、前季作物种类、白术品种、基肥施用、土壤排水条件及土表覆盖措施对白术白绢病SclerotiumrolfsiiSacc .的影响大 ,在高温、降雨多、前季作物为花生、用牛粪作基肥、尖顶窄叶高秆品种、土表覆盖稻草或不覆盖等条件下发生更严重 ,而白术生育期对此没有影响。绿亨一号和多菌灵在室内条件下对白绢病菌的菌丝有很强的抑制作用 ,其EC50 分别为 5 4 9mg/L和 8 84mg/L ,而井岗霉素为 4 6 77mg/L。绿多混合或绿井混合主要表现出相加作用 ,其共毒系数CTC分别是 10 9 0 5和 10 2 0 1。田间小区药效试验也表明绿亨一号和多菌灵都显著有效 ,井岗霉素很差 ,其药效分别为 98 81%、 92 4 8%和2 6 2 4 %。绿多混合和绿井混合的防效分别是 93 6 7%和 5 4 0 4 %。 The experiments showed that climate,previous crops,varieties,base fertilizers,drainage conditions and surface cover all influenced largehead atractylodes southern blight.High temperature,heavy rainfall,peanut as previous crop,cow dung as base fertilizer,small leaf tall stem variety,straw covered or non covered caused a higher incidence.Hymexazol and carbendazim showed stronger inhibition to mycelia of Sclerotium rolfsii Sacc.(EC 50 =5 49mg/L,8 84mg/L respectively),but validamycin A is hardly effective(EC 50 =66 07mg/L)in lab.The mixtures of hymexazol and carbendazim or hymexazol and validamycin A didnt show higher synergistic action(co toxicity coefficient CTC= 109 05,102 01 respectively).Hymexazol and carbendazim were more effective than validamycin A(control effects were 98 81%,92 48%,26 24% respectively).The control effects of the mixtures of hymexazol and carbendazim or hymexazol and carbendazim were 93 67%and 54 04% respectively.

关 键 词： 白术 白绢病 发病规律 药剂防治

领　　域： [农业科学] [农业科学]