[目的]为大面积推广应用唑啉·炔草酸(大能)提供理论依据.[方法] 通过小区试验和大区验证系统地研究了大能的应用技术.[结果] 在禾本科杂草2～4叶期施用大能30.0 ml(a.i.)/hm2的总防效为71.3%～92.5%;施大能45.0 ml(a.i.)/hm2的防效明显高于麦极和骠马.在禾本科杂草5～9叶期施大能60.0 ml(a.i.)/hm2,90 d后的株防效和鲜重防效为88.5%～93.5%,明显优于麦极和骠马.大能和异丙隆、麦喜等除草剂混用能显著提高大能的防效.用3种不同喷雾器喷施相同药液量的大能对低叶龄禾本科杂草的防效良好且无显著差异.在3月上旬施用大能60.0、75.0和90.0 ml(a.i.)/hm2,药后30和60 d的防效为86.3%～100.0%,且对小麦安全.[结论] 大能在禾本科杂草2～4叶期的最佳使用剂量为45.0 ml(a.i.)/hm2,春后3月上旬前的最佳使用剂量为60.0 ml(a.i.)/hm2.%[Objective]The purpose was to supply theoretical basis for the large-area popularization and application of pinoxaden·clodinafop-propargyl (Daneng).[Method] The application technique of Daneng was researched through plot experiments and block verification systematically.[Result] The total control effect of applying Daneng at the dosage of 30.0 ml(a.i.)/hm2 in the 2-4-leaf stage of grass weeds was 71.3%～92.5% and the control effect of applying Daneng at the dosage of 45.0 ml(a.i.)/hm2 was obviously higher than that of clodinafop-propargyl and fenoxaprop-p-ethyl.When Daneng was applied at the dosage of 60.0 ml(a.i.)/hm2 in the 5-9-leaf stage of grass weeds, its stem control effect and weed control effect on fresh weight after 90 d were 88.5%-93.5% and obviously superior to that of clodinafop-propargyl and fenoxaprop-p-ethyl.The mixed use of Daneng with herbicides such as isoproturon and florasulam + flometsulam could enhance its control effect significantly.The control effects of spraying Daneng at the same reagent liquid dosage with 3 different sprayers on low leaf-age grass weeds were good and had no significant difference.After 30 and 60 d, the control effects of applying Danneng at the dosage of 60.0, 75.0 and 90.0 ml(a.i.)/hm2 in early Mar.were 86.3%-100.0% and they were safe to wheat.[Conclusion] The optimum dosage of Daneng in the 2-4-leaf stage of grass weeds was 45.0 ml(a.i.)/hm2 and its optimum dosage was 60.0 ml(a.i.)/hm2 between spring and early Mar.
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