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[目的]为了筛选防除黄河流域棉区棉田杂草的理想药剂,采用茎叶喷雾法对8种棉田常用茎叶处理除草剂进行了田间药效试验。[结果]10.8%高效氟吡甲禾灵EC、15%精吡氟禾草灵EC、10%精喹禾灵EC和6.9%精唑禾草灵EW对棉田常见禾本科杂草的防效明显,田间分别按照81、180、90、82.8 g a.i./hm2使用后,药后30 d的株防效可达80%以上,鲜质量防效高达98%以上;而75%嘧硫草醚WG、20%百草枯AS、41%草甘膦异丙胺盐AS、75%三氟啶磺隆钠盐WP能显著地抑制阔叶杂草的生长。[结论]若棉田以禾本科杂草为主,可以选用10.8%高效氟吡甲禾灵EC、15%精吡氟禾草灵EC、10%精喹禾灵EC和6.9%精唑禾草灵EW,于杂草2~3叶期进行茎叶喷雾;若田间阔叶杂草发生较重,可用20%百草枯AS或41%草甘膦异丙胺盐AS进行行间定向喷雾处理。
[Objective] The research aimed to screen the ideal medicament for controlling weeds in the cotton area of the Yellow River valley in cotton fields. [Result] The control effect of 10.8% high-efficiency flumethoxol EC, 15% fluazifop-EC, 10% quizalofop-p-ethyl and 6.9% , Respectively. After being used in the field for 81, 180, 90 and 82.8 g ai / hm2 respectively, the control efficacy of the strains reached more than 80% after 30 days and the fresh-quality control efficiency was over 98% 20% paraquat AS, 41% glyphosate isopropylamine AS, 75% trifloxysulfuron sodium WP significantly inhibited the growth of broad-leaved weeds. [Conclusion] If the cotton weeds were mainly grass weeds, 10.8% high-efficiency flumethrin EC, 15% fluazifop EC, 10% quizalofop-p-ethyl and 6.9% EW was sprayed on stems and leaves at 2 ~ 3 leaf stage of weeds. If the broadleaf weeds were heavy in the field, 20% paraquat AS or 41% glyphosate isopropylamine AS could be used for directional spray treatment.