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小麦是我省主要栽培作物之一,产量高,面积大。近几年来,由于连作比例增加,阔叶杂草危害日趋严重,致使产量大幅度下降。生产上常以2,4—D 丁酯防除,但养麦蔓(polyo-num convolvulus L.)等一些恶性阔叶杂草,对2,4—D 丁酯产生了很强的抗性,加大剂量也很难防除,新引进的百草敌对其防效很好。为扩大杀草谱,提高杀草效果,进而提出2,4—D 丁酯与百草敌混用,但混用比例和使用时期一直没有彻底解决。为此,我们于1984～1986年进行了试验研究,旨在探索投资少、产量高、收益大的除草技术,为经济合理用药提供科学依据。
Wheat is one of the main cultivated crops in our province, with high yield and large area. In recent years, due to the increasing proportion of continuous cropping, the threat of deciduous weeds is becoming more and more serious, resulting in a sharp drop in output. Butyl 2,4-D butyl ester is commonly used in the production, but some malignant broad-leaved weeds such as polyo-num convolvulus L. have strong resistance to 2,4-D butyl ester. Large doses are also difficult to control, the introduction of the new grass has a good control effect. In order to expand the herbicide-killing spectrum and improve the herbicide-killing effect, it was suggested that 2,4-D butyl ester should be mixed with herbicide, but the mixing ratio and the use period have not been completely solved. To this end, we conducted a pilot study from 1984 to 1986 with the aim of exploring weeding techniques with low investment, high yield and large returns, so as to provide a scientific basis for economical and rational drug use.