我区麦田杂草以繁缕、看麦娘为主。经观察,对小麦的影响很大:每平方尺内有杂草100株的麦田,小麦有效穗少6.9%;有草200株的,有效穗降低26.3%;有800和1,000株杂草的,麦穗分别少37—44%和64—70%。草害还使每穗粒数与千粒重下降。麦田施用化学药剂除草,施用技术各地不同。我们于1975—1978年,进行了试验示范,初步明确了适合我区的应用技术。 My area of ​​wheat weeds to spiderwears, see Omaha mainly. It has been observed that the impact on wheat is very large: wheat field with 100 weeds per square foot had less effective spike of 6.9%; wheat with 200 plants reduced 26.3% effective spike; with 800 and 1,000 weeds, Wheat ears were 37-44% less and 64-70% less. Grass damage also reduced the number of grains and 1000-grain weight per spike. Weed application of chemical pesticides in wheat fields, different application techniques. In 1975-1978, we carried out experiments and demonstrations, initially defining the application technologies suitable for our region.