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用五级目测草害调查法,对全县麦田杂草种群的分布与危害作了调查。从调查结果看出,近年来麦田杂草种群起了很大变化。单子叶杂草占绝对优势,双子叶杂草居次。看麦娘、硬草和棒头草为麦田的主要杂草。牛繁缕密度下降,大巢菜、泥糊菜、一年蓬、紫苑等阔叶草有所增加。通过调查分析,明确了地域间杂草种群的分布与危害、杂草种群变化的原因及今后的防除对策。
With five visual grass-weed survey method, we investigated the distribution and hazard of the weed population in the whole county. According to the survey results, the weed population in wheat fields has greatly changed in recent years. Monocotyledonous weeds accounted for the absolute superiority, dicotyledon weeds ranking. See Aman, hard grass and head grass for the main wheat weeds. Decline in the density of the cow’s wisp, big nest dishes, mud paste vegetables, year Peng, Aster and other broadleaf has increased. Through the investigation and analysis, the distribution and hazard of weed population in different regions were clarified, the reasons for the change of weed population and the future control strategies were also discussed.