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1980～1984年用小区对比方法对小麦白粉病的防治指标进行研究。1975～1985年在农业防治的基础上,又对化学防治进行研究,在降低农业成本和减少农药对环境的污染方面,收到良好的效果。(一)防治指标1.试验方法及关系式计算根据1980～1984年不同的农业栽培措施播期、行距、基本苗、氮肥用量等对小麦白粉病的影响,用对比方法随机排列试验,小区面积0.02亩。从3月中旬开始定
From 1980 to 1984, the control index of wheat powdery mildew was studied by community comparison method. From 1975 to 1985, on the basis of agricultural prevention and control, we conducted a study on chemical prevention and control and received good results in reducing agricultural costs and reducing the pollution of pesticides to the environment. (A) Control Index 1. Test Method and Relationship Calculation According to the different agricultural cultivation measures from 1980 to 1984, sowing date, row spacing, the basic seedlings, the amount of nitrogen fertilizer on wheat powdery mildew, randomized to compare the method of test, the plot area 0.02 acres. From mid-March to begin