白粉病是我省小麦高产地区重要病害之一。近年来,随着水肥条件的改善和矮杆品种的推广。小麦群体增大,叶片密集,白粉病有所发展,对产量有一定影响。郑州七六一小麦,是一个低杆抗倒、成穗多、落黄好、千粒重高而稳定的优良品种,缺点是易感白粉病。三年来,我县通过试验、示范,推广约5万亩。小麦白粉病对其产量的影响以及发病规律、防治方法等问题,引起大家的注意,现将初步观察结果分叙于后,供参考。一、不同发病程度对产量的影响二年来观察,小麦白粉病多发生在叶片 Powdery mildew is one of the most important diseases in high-yielding wheat in our province. In recent years, with the improvement of water and fertilizer conditions and the promotion of dwarf varieties. Increased population of wheat, dense leaves, powdery mildew developed, have a certain impact on the yield. Zhengzhou 761 wheat, is a low bar anti-down, into a spike, fall yellow is good, a thousand grain weight high and stable varieties, the disadvantage is susceptible powdery mildew. In the past three years, our county passed the test, demonstration and promotion of about 50,000 mu. Wheat powdery mildew on its yield as well as the incidence of law, prevention and control and other issues, aroused the attention of everyone, the preliminary observations are now divided into points for reference. First, the impact of different levels of disease on yield Two years to observe the occurrence of wheat powdery mildew in the leaves