【摘要】 为探究大豆玉米带状间作玉米田病害的发生情况以及筛选高效杀菌剂，开展田间病害调查，明确玉米田的主要病害种类，通过菌丝生长法以及田间药效测定5种杀菌剂对病害的防治效果。结果表明，玉米田的主要病害为玉米纹枯病（Rhizoctonia solani）,240 g/L噻呋酰胺悬浮剂、24%井冈霉素A水剂、12.5%烯唑醇可湿性粉剂对玉米纹枯病的EC₅₀分别为0.015 9、0.977 1、0.033 0 mg/L。根据田间药效结果，在第二次施药7 d后，这3种药剂对玉米纹枯病的防效较好，防效分别达到81.94%、79.18%、75.63%；在第二次施药14 d后防效均超过70%。杀菌剂处理均增加了玉米产量，比对照增产5.59%～18.88%。综上所述，噻呋酰胺、井冈霉素A和烯唑醇在推荐剂量下可有效防治玉米纹枯病，可在生产上推广应用。更多还原

【Abstract】 To investigate the occurrence of maize diseases in soybean-maize strip intercropping fields and screen efficient fungicides, a field survey was conducted to identify the main disease affecting maize, and the control efficacy of five fungicides was determined via the mycelial growth method and field efficacy trials. The results showed that the main disease was maize sheath blight（Rhizoctonia solani）, and the EC₅₀of thifluzamide 240 g/L SC,jingangmycin A 24% SC, and diniconazole 12.5% WP wettable powder against the disease were 0.015 9, 0.977 1,and 0.033 0 mg/L, respectively. Field efficacy trials demonstrated that at 7 days after the second application, these three fungicides had good preventive effects against maize sheath blight, with the control efficacies reaching81.94%, 79.18% and 75.63%, respectively, and at 14 days after the second application, the control efficacies remined above 70%. All fungicide treatments increased maize yield, with an increase ranging from 5.59% to 18.88%compared to the control. In conclusion, thifluzamide, jingangmycin A and diniconazole can effectively control maize sheath blight at their recommended application dosages, and are suitable for popularization and utilization in production.更多还原