日本看麦娘 (Alopecurusjaponicussteud)属禾本科 1a生杂草 ,从 90年代初期危害逐年加重 ,现已成为我市麦田主要杂草之一 ,一般可影响小麦产量1～ 2成。 1 999～ 2 0 0 2年我们对日本看麦娘在本地的发生及防治技术进行了研究 ,现将研究结果报告如下。1　形态特征幼苗 :第 1片真 Alopecurus japonicussteud is a gramineous herbaceous weed, which has been increasing year by year since the early 1990s. It has become one of the major weeds in the wheat field in our country and generally affects wheat yield by 1 to 2 percent. From 1999 to 2002, we conducted a study on the occurrence and control technology of Amelie in Japan. The research results are reported as follows. 1 morphological characteristics of seedlings: the first one really