九种杀菌剂对Fusarium verticillioides和F.graminearum毒力及玉米穗腐病的防治效果

采用含毒介质法分别测定玉米穗腐病菌禾谷镰孢菌和拟轮枝镰孢菌对9种药剂的敏感性，在田间进行防治玉米穗腐病的药效试验，综合评价化学和生物药剂以及不同施药处理对玉米穗腐病的防治效果。室内毒力测定结果表明，9种药剂在一定浓度下对玉米穗腐病均有毒力作用，10%苯醚甲环唑、70%甲基托布津对禾谷镰孢菌毒力较强；70%甲基托布津对轮枝镰刀菌毒力较强，10%苯醚甲环唑次之。田间药效试验结果表明，50%异菌脲可湿性粉剂防效为92.3%，5%井冈霉素为80.64%；且先接菌后喷药的防治效果优于先喷药后接菌处理。

Toxicity and Field Control Effect of Nine Fungicides Against Fusarium Ear Rot

Toxicity of nine fungicides to Fusarium verticillioide and Fusarium graminearum were tested by toxic media method in lab and control experiment was also conducted in the field. Control efficacy and treatment application of chemical and biological fungicide to corn ear rot were comprehensive evaluated. The result of toxicity indicated that Difenoconazole and Thiophanate-methyl showed strong toxicity against Fusarium graminearum, Thiophanate-methyl, Difenoconazole showed strong toxicity against Fusarium verticillioides. The results of field control indicated that the control efficacies of Iprodione and Jingangmeisu were 92.3% and 80.64%, and control efficacy of spraying fungicides after inoculation, was better than that of inoculation after spraying fungicides.