察北是察哈尔省的春麦产区,因麦稈蝇的为害,产量损失很大,已引起一般人的注意。关于麦稈蝇在察北地区的生活变化及为害的严重性,在本刊本年四、五两期中发表过。今年的生活史观察当中,发现有小麦蝇(属于双翅目,黄潜蝇科)为害。小麦被害率平均达25.05%,不仅是麦稈蝇的为害,与小麦蝇是不能分开的。初步调查被害株数200株,剥出麦稈蝇164 Chabei is a spring wheat producing area in Chahar province. Due to the damage caused by wheat straw flies, the yield loss is very large and has drawn the attention of most people. The life changes and the seriousness of the flies in the Chabei area have been published in the fourth and fifth issues of this year. During this year’s life history observation, it was found that there were wheat flies (belonging to the Diptera and Plumeriaceae). The average damage rate of wheat is 25.05%, which is not only the damage of wheat flies but also inseparable from that of wheat flies. The initial investigation of the number of 200 strains of plants, stripped of fruit flies 164