前言六十年代初期,美国首先发现了除草醚,从此开辟了二苯醚类除草剂。二十多年来,此类除草剂有了很大发展,相继出现了一些新的品种如X—52,Goal,Blazer,Mk—412等。二苯醚类除草剂是作为萌发抑制剂,对禾本科杂草有选择性防除的特性。它不仅广泛地用于水稻秧田,移栽田和直播田,而且还能用于棉、麦、豆类、玉 Preface In the early 1960s, the United States first discovered weedicide and opened up its diphenyl ether herbicides. For more than two decades, there has been a great development of such herbicides. Several new varieties have emerged such as X-52, Goal, Blazer and Mk-412. Diphenyl ether herbicides are germinating inhibitors that selectively control grass weeds. It is not only widely used in rice seedlings, transplanting and direct seeding, but also for cotton, wheat, beans, jade