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棉花苗床(育苗田)土质肥沃、温湿度适宜,杂草危害猖獗,影响棉苗的生长发育。棉花苗床杂草的防治应结合农业措施,同时应用除草剂加强化学防治。农业措施主要包括苗床土的精选,选择过去杂草发生较轻田块的土;对所选土进行挑选、过筛,除去一些大粒杂草种子、莎草等杂草的根茎,减少土壤中的杂草种子数量。防治时主要抓好覆膜前施用除草剂,对于后期杂草发生较重的苗床,可以在揭膜后施用茎叶处理除草剂及时补治,减轻杂草的危害。
Cotton seedbed (nursery) soil fertile, suitable temperature and humidity, weeds rampant, affecting the growth and development of cotton seedlings. Cotton seedbed weeds should be combined with agricultural measures, while applying herbicides to strengthen chemical control. Agricultural measures include the selection of seedbed soil, the selection of past weeds occurred plots of light soil; selected soil selection, screening, removal of some large weed seeds, sedge and other weeds rhizomes to reduce soil Of weed seeds. Preventive grasping the main application of herbicides before the film, for late weeds heavier seedbed can be applied after the film stems and leaves treated herbicides and timely remedial, reduce the hazards of weeds.