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1973年以来,多伦县每年采用2.4—滴丁脂大面积除草,效果很好,估计可以普遍增产15%以上。我们体会,必须注意下列几点,才能达到安全又增产。试验掌握当年,当地杀草效高的浓度2.4—滴了脂的杀草效果与常用药品贮存年限和保管条件不同而有差异。因此,每年应先作小面积试验,从中选取除草效果好的浓度,而后大田应用。方法是:按2.4—滴丁脂每亩用量为0.7、0.8、0.9、1.0、1.1两,分别兑水15～18斤,分做五种
Since 1973, Duolun County uses 2.4-drop butane large-scale weeding every year, which works well and is estimated to increase production by more than 15%. We realize that we must pay attention to the following points in order to achieve safety and increase production. Test grasping the same year, the local high concentrations of herbicides 2,4-D lipid-lowering herbicides and commonly used drugs storage life and storage conditions vary. Therefore, each year should be first for a small area test, we choose good herbicidal concentration, and field applications. Method is: 2.4-D butyl per mu amount of 0.7,0.8,0.9,1.0,1.1 two, respectively, watered 15 to 18 pounds, divided into five