三种杀菌剂对老芒麦苗期茎腐病的防治效果  

Effects of 3 Kinds of Fungicides on Stem Rot of Elymus sibiricus L. in the Seedling Stage

作　　者：刘金平[1] 游明鸿[2] 白史且[2] 王龙[1] 

机构地区：[1]西华师范大学生命科学学院,四川南充637009 [2]四川省草原科学研究院,成都611731

出　　处：《湖北农业科学》2011年第11期2244-2246,共3页Hubei Agricultural Sciences

基　　金：国家牧草产业技术体系和"十一五"国家科技支撑项目(2007BAC18B04);四川省教育厅资助项目(08zc008)

摘　　要：通过喷施不同浓度的施乐福、瑞苗清、根腐净等杀菌剂,分析了其对老芒麦植株密度、存活率及生长情况的影响。结果表明,苗期茎腐病发病率、死亡率高达78.54%与24.96%,病情指数为53.09;不同浓度施乐福处理间,株高及叶片差异不明显(P>0.05),密度与存活率呈现极显著差异(P<0.01);不同浓度瑞苗清处理间,叶长差异显著(P<0.05),所有浓度防治茎腐病效果均达显著水平;不同浓度根腐净与对照(喷清水)的密度与存活率间差异不明显;施乐福、瑞苗清防治效果好于根腐净;施乐福2 000与2 500倍液、瑞苗清2 000与3 000倍液适宜在生产中应用与推广。3 kinds of fungicides（Shilefu,Tachigaren,Genfujing） with different concentrations were sprayed on Elymus sibiricus L.cv.Chuancao No.2 in the seedling stage.After half a month,the plant density,survival rate and growth index was measured and analysed.The results showed at in seedling stage,the stem rot incidence rate and mortality rate of E.sibiricus reached 78.54% and 24.96%,respectively.And the disease index was 53.09.As to Shilefu,different concentrations significantly affected the density and survival rate（P0.01）;to Tachigaren,the stem rot of E.sibiricus of all treatment was controled and treat concentration had a significant effect on leaf length（P0.01）.But Genfujing only had a non-significant influence on the density and survival rate.In short,Shilefu,Tachigaren had better effect to control stem rot of E.sibiricus than Genfujing.And 2 000 or 2 500 times dilution of Shilefu,2 000 and 3 000 times dilution of Tachigaren may be applied in practice.

关 键 词：老芒麦 茎腐病 杀菌剂 发病率 病情指数 

分 类 号：S482.2[农业科学—农药学]