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:1 993～ 1 996年连续 4年对豫麦 2号、豫麦 4 1号、豫麦 54号等 1 2个小麦品种小麦纹枯病抗性和产量损失测定结果表明 :所推广各品种中没有免疫或高抗品种 ,都存在不同程度的感病性。实验结果还表明产量损失与病情严重度级别之间存在着显著的线性相关 ,严重度每提高一级 ,产量损失增加约 1 0 %～ 2 0 %左右 ;在产量损失的构成中 ,千粒重下降处于主导地位 ,粒数的减少其次 ;始病愈早 ,发病愈重 ,相应的产量损失愈大。不同地区 ,播期不同 ,发病期亦不同 ,从生育期来看 ,却是基本一致的 ,返青期为小麦纹枯病的复苏期 ,抽穗期为发病始盛期 ,乳熟期为发病高峰期 ,与温湿度有关。品种间发病差异明显 ,但未发现高抗品种 ,河南省目前生产上广泛应用主要品种的抗纹枯病的特性不同 ,中抗至中感。增施磷、钾肥能显著地减轻病害和增加产量 ,可作为防病措施推广应用。另外 ,大田调查还发现 ,轮作、间作和控制种植密度能减轻病害发生与其作物的纹枯病相似
: The results of wheat sheath blight resistance and yield loss of 12 wheat cultivars including Yumai 2, Yumai 4 1 and Yumai 54 from 1994 to 1996 showed that among the varieties promoted No immunity or high resistance varieties, there are varying degrees of susceptibility. The experimental results also showed that there was a significant linear correlation between the yield loss and the disease severity level. The yield loss increased by about 10% ~ 20% for each level of severity increase. In the composition of yield loss, the grain weight decreased Dominance, followed by the reduction of the number of grains; the earlier the onset of disease, the heavier the disease, the greater the yield loss. Different regions, different sowing dates, the incidence of different, from the growth point of view, it is basically the same, the return of wheat sheath blight in the recovery period, heading for the onset of onset, milky period for the peak incidence , And temperature and humidity related. The obvious difference between the varieties of disease, but did not find high resistance varieties, Henan Province, the current production of the main varieties of widely used in the sheath blight of different characteristics, resistance to the flu. Adding phosphorus and potassium fertilizer can significantly reduce the disease and increase the yield, which can be used as the prevention and treatment measures. In addition, the field survey also found that rotation, intercropping and control of planting density can reduce disease occurrence similar to that of crop sheath blight