不同除草剂在直播冬油菜田的除草效果研究

目的]验证不同除草剂的除草效果,为直播冬油菜田的杂草防除提供借鉴。方法]使用不同剂量25%胺苯磺隆可湿性粉剂和10.8%高效氟吡甲禾灵乳油在直播冬油菜田间进行单用和混用除草试验。结果]25%胺苯磺隆可湿性粉剂在冬油菜4～5叶期使用可以有效防除田间的阔叶杂草;25%胺苯磺隆可湿性粉剂18.0～22.5 g/hm2＋400 ml/hm2的10.8%高效氟吡甲禾灵乳油可以有效防除油菜田间的阔叶和禾本科杂草,总防效达90%以上,且可以比人工除草节省成本1 100元/hm2。结论]25%胺苯磺隆与10.8%高效氟吡甲禾灵乳油混用可以更好地防除冬油菜田间杂草。

Effect of the Different Herbicides in the Weed-controlling in the Field of Directly Rape-sowing in Winter

Objective] The reference for the weed-controlling in the field of directly rape-sowing in winter was provided through the verification of the effect of weed-controlling of different herbicides.Method] The experiment in the effect of the alone or mixture application of 25% ethametsulfuron WP and 10.8% fluoride pyridine EC with the different doses on the weeding in the field of directly rape-sowing in winter was conducted.Results] The application of 25% ethametsulfuron WP in 4-5 rape leaves could effectively control broadleaf weeds.The mixture of 18.0~22.5 g/hm2 of 25% ethametsulfuron WP and 400 ml/hm2 of 10.8% fluoride pyridine could effectively control the broad-leaved and cereal weeds in rape field,which total control efficiency was over 90%,and the cost of more 1 100 yuan/hm2 could be saved with the method than that with the manual weeding.Conclusion] The mixture of 25% ethametsulfuron and 10.8% fluoride pyridine was better in the weed-controlling in rape field in winter.