种子处理与穗期喷雾联合应用对小麦主要病虫害的防控及增产效果评价

Evaluation of Prevention and Control Effect of Wheat Main Diseases and Insect Pests by Combined Application of Seed Treatment and Spike Spray and Its Yield Increasing Effect

[目的]评价种子处理与抽穗扬花期一喷多防一体化防控技术对小麦主要病虫害的防控及增产效果。[方法]在进行土壤深松处理的基础上,采用吡虫啉加苯醚甲环唑混合拌种与抽穗扬花期一喷多防联合应用的措施,调查该技术对小麦纹枯病、根腐病、锈病、白粉病、麦蜘蛛、麦蚜等病虫害的防效及增产效果。[结果]种子处理对纹枯病、根腐病、麦蜘蛛、麦蚜的防效分别可达90.4%、89.5%、73.3%和87.9%;后期一喷多防后21 d,对锈病、白粉病的防效达96.2%和99.9%,麦蚜防效98.6%,持效期长、药效极显著。同时,应用该套防控技术可以获得显著的增产效果,其中单用种子处理技术可增产13.9%,与一喷多防联合使用后可将增产幅度提升至35.2%。[结果]该一体化防控技术值得大力推广。

[Objective]To evaluate the prevention and control effect of wheat main diseases and insect pests by combined application of seed treatment and spike spray and its yield increasing effect.[Method]On the basis of soil subsoiling treatment, the integrated prevention and control method of imidacloprid and Difenoconazole mixed seed dressing and spraying at heading and flowering stage was used to investigate the control effects of this technology on wheat sheath blight, root rot, rust, powdery mildew, wheat spider and wheat aphid and its yield increasing effect.[Result]The control effects of seed treatment on, sheath blight, root rot, wheat spider and wheat aphid were 90.4%, 89.5%, 73.3% and 87.9% respectively. 21 days after spraying, the control effect on rust and powdery mildew was 96.2% and 99.9%, and the control effect on wheat aphid was 98.6%. The effect lasted for a long time and was very significant. The application of this integrated prevention and control method could achieve remarkable yield increase effect. The yield could be increased by 13.9% by using seed treatment alone and 35.2% by using seed treatment combined with spraying.[Conclusion]The integrated prevention and control technology deserved to be vigorously promoted.