When dealt before sowing, 48% trifluralin could be used to control both cereal weeds and broad-leaf weeds and the controlling efficiency was 90% respectively and 70%.

• 播前用 48%25氟乐灵EC 15 0 0ml/hm2 作土壤处理 ,对禾本科杂草的防效达 90%25以上 ,对阔叶杂草的株防效达 70%25。