麦种蝇Delia coarctata(Fall.)是宁夏南部山区和甘肃陇东、陇南等地冬麦(黑麦)的重要地下害虫,常造成返青后麦苗枯心腐烂而缺苗断垅,严重的地块因死苗太多不得不翻耕改种。因为此虫在田间发生不均匀,有的点片麦苗几乎全部被害,而有的点片死苗很少,呈斑秃状。要正确掌握它的发生程度和防治效果,必须先弄清它在田间的分布特点,采用科学的取样技术,才能得到符合实际的结果。 Delia coarctata (Fall.) Is an important underground pest of winter wheat (rye) in the mountainous areas of southern Ningxia and Gansu Longdong and Longnan, etc., often resulting in dry seedlings rotting but lacking seedlings after returning to green. The serious land Too much because of dead seedlings have to change farming. Because of this uneven occurrence of insects in the field, and some spots were almost completely killed wheat seedlings, and some spots dead seedlings few, were alopecia-shaped. To correctly grasp its occurrence and prevention and control effects, we must first understand its distribution in the field characteristics, the use of scientific sampling techniques, in order to get realistic results.