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1978年,内蒙地区麦秆蝇大发生,危害十分严重。我们从农牧学院农场小麦生产田及部分试验田调查播种期不同与麦秆蝇危害间关系,发现麦秆蝇的危害随小麦播种期的推迟而显著加重,小麦的产量则随播种期的延迟而明显降低。因此,适期早播,在防治麦秆蝇的农业措施中具有重要意义。小麦受麦秆蝇危害后表现三种征状(见封二图一):一是枯心,二是烂穗,三是白穗。晚播的桔心率显著增大。我们于麦收前调查了四块
In 1978, large-scale occurrence of straw flies in Inner Mongolia was very serious. We investigated the relationship between the different sowing dates and the harm of the stem flies from the farm wheat farms and some experimental fields in the Farming and Pasture Institute and found that the harm of the stem flies was significantly aggravated with the delay of the sowing date of wheat and the yield of wheat with the delay of the sowing dates Obvious reduction. Therefore, the early sowing date is of great significance in the agricultural measures to prevent and control straw flies. Wheat by the straw flies after the performance of the three kinds of symptoms (see cover two Figure I): First, twilight, and second, spike, three white spike. Evening sow heart rate increased significantly. We surveyed four wheat before harvest