5种杀菌剂防治甜玉米小斑病田间药效试验

Test on control efficiency of 5 fungicides against Bipolaris maydis

用生长速率法测定了10种杀菌剂对甜玉米小斑病的毒力,筛选出7.5%欧宝、22.5%扑海因、43%好力克、25%敌力脱和70%甲基托布津5种杀菌剂进行田间药效试验,结果显示:7.5%欧宝田间相对防效最好,平均防治效果为83.0%;其次是好力克,平均防效68.3%;70%甲基托布津和敌力脱防治效果较差。7.5%欧宝值得推广应用。

Control efficiency of 5 fungicides including Opal （7.5% EC）, Iprodione （22.5%）, Horizon （43%）, Tilt （25%） and Topsin-M （70%）, which selected by means of growth velocity test against Bipolaris maydis, were tested in field. The results indicated that the control efficiency of Opal was better than Horizon, the efficiency reached 83.0% and 68.3% respectively. However, the control efficiency of Topsin-M and Tilt were low. The Opal was recommended for application in field to control the B. maydis according to the result of this paper.