草业学报2016，Vol.25Issue(9)：132-141,10.DOI:10.11686/cyxb2015514
防治糜子丝黑穗病的杀菌剂筛选及田间防治效果研究
Efficacy of fungicides for control of head smut (Sporisorium destruens)in broomcorn millet
摘要
Abstract
Six fungicides potentially useful for control head smut in broomcorn millet (Panicum miliaceum ) were assessed for toxicity and field efficacy against Sporisorium destruens by assessing teliospore germination on agar medium in a laboratory and the growth of broomcorn millet in the field over two seasons.The results of laboratory toxicity tests showed that tebuconazole exhibited the greatest inhibition of S .destruens ,with the EC50 (median effective concentration)value of 0.1127 μg/mL,followed by diniconazole,difenoconazole,thio-phanate-methyl and carbendazim with the EC50 values of 1.0634,6.1775,12.4969 and 54.4021 μg/mL,re-spectively.Thiram showed the lowest toxicity with the EC50 value of 1169.6448 μg/mL.Compared with the control (no fungicide),fungicide treatments significantly decreased the germination rate and vigor of broom-corn millet seeds.Diniconazole reduced germination and vigor the most.The results of field efficacy trials were similar;tebuconazole had the best control efficacy,followed by diniconazole,thiophanate-methyl and carbenda-zim.The control efficacy of difenoconazole was good only at high concentration.Thiram had the poorest con-trol efficacy.Carbendazim significantly reduced the area of the second and the third leaf,dry weight of leaves and the number of tillers.Compared with the control,all fungicide treatments reduced grain weight but in-creased the grain yield.Broomcorn millet yields following tebuconazole application were the highest in both years,while thiram didn’t significantly increase yield in 2014.In summary,tebuconazole produced the best control efficacy at the lowest application rate and could be used for broomcorn millet production.关键词
杀菌剂/糜子丝黑穗病菌/毒力/田间防效Key words
fungicides/Sporisorium destruens/toxicity/field control efficacy引用本文复制引用
刘佳佳,周瑜,张盼盼,晁桂梅,朱明旗,冯佰利..防治糜子丝黑穗病的杀菌剂筛选及田间防治效果研究[J].草业学报,2016,25(9):132-141,10.基金项目
国家谷子糜子产业技术体系专项资金（CARS-07-13．5-A9），科技支撑计划项目（2014BAD07B03）和国家自然科学基金（31371529）资助。 （）
