辽宁省玉米纹枯病发生规律及防治技术

通过试验小区人工接种和大田普查观测了玉米纹枯病病害流行的时间动态，绘制了病害季节流行曲线。结果表明，井冈霉素对玉米纹枯病有很好的防效，不同生育期施药防治效果有显著性差异，拔节期是玉米纹枯病的最佳防治适期。发病初期摘除病鞘、病叶能有效降低玉米纹枯病的危害，在施药的同时结合摘除病鞘能显著提高防治效果。

The Epidemiology of Corn Sheath Blight and Its Preventive Treatment

The corn sheath blight caused by Rhizoctonia solani Kühn is an epidemic disease in these years in Liaoning province. In this paper, the temporal dynamic of epidemic and disease epidemic curve were surveyed and analyzed. The studies showed that efficacy of Jinggangmycin for the control of maize sheath blight is significant. There was significant difference between the efficacies of the fungicide spraying at different growth stage of corn. The highest control efficacy was obtained when the fungicide was sprayed at jointing stage. The best time of applying the fungicide should be ahead of high peak of disease occurring. The controlling measures that excising the diseased leaves in time combined with spraying antibiotics in initial stage could be popularized.