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玉米纹枯病产量损失测定结果表明,高温是病害流行的主导因子,病害发生程度与产量损失率成正相关。严重度每提高一级,产量损失增加10%左右,主要是千粒重下降。始病愈早,发病愈重,产量损失也就愈大。不同品种,地势,海拔高度,栽培方式的不同,病情就不同。从生育期来看,却是基本一致的,玉米抽雄期为发病始盛期,乳熟期为发病高峰期。目前本地区广泛应用的盛农3号杂交组合,中抗至中感,其丰产性好。增施钾肥能显著地增产和减轻病害。调查发现,轮作、间作和控制种植密度能减轻病害发生。
The results of the determination of yield of corn sheath blight showed that high temperature was the dominant factor of the epidemic, and the degree of disease occurrence was positively correlated with the yield loss rate. Each increase in severity, the yield loss increased by about 10%, the main grain weight decline. The earlier onset, the morbidity, the greater the yield loss. Different varieties, topography, altitude, different cultivation methods, the disease is different. From the growth point of view, it is basically the same, the tasseling stage of maize tasted the peak period, the milky stage of onset of the peak. Currently widely used Shengnong 3 hybrid combinations, the resistance to the flu, its high yield good. Increased potash fertilizer can significantly increase the yield and reduce disease. The survey found that rotation, intercropping and control of planting density can reduce the occurrence of diseases.