许勇华, 赵恒科, 赵灵杰, 侯建宇. 五氟磺草胺与吡氟酰草胺的联合作用及对水稻移栽田杂草的防效[J]. 农药学学报, 2022, 24(4): 812-818. DOI: 10.16801/j.issn.1008-7303.2022.0060
    引用本文: 许勇华, 赵恒科, 赵灵杰, 侯建宇. 五氟磺草胺与吡氟酰草胺的联合作用及对水稻移栽田杂草的防效[J]. 农药学学报, 2022, 24(4): 812-818. DOI: 10.16801/j.issn.1008-7303.2022.0060
    XU Yonghua, ZHAO Hengke, ZHAO Lingjie, HOU Jianyu. Synergistic effect and field efficacy of penoxsulam mixed with diflufenican against weeds in transplanted rice[J]. Chinese Journal of Pesticide Science, 2022, 24(4): 812-818. DOI: 10.16801/j.issn.1008-7303.2022.0060
    Citation: XU Yonghua, ZHAO Hengke, ZHAO Lingjie, HOU Jianyu. Synergistic effect and field efficacy of penoxsulam mixed with diflufenican against weeds in transplanted rice[J]. Chinese Journal of Pesticide Science, 2022, 24(4): 812-818. DOI: 10.16801/j.issn.1008-7303.2022.0060

    五氟磺草胺与吡氟酰草胺的联合作用及对水稻移栽田杂草的防效

    Synergistic effect and field efficacy of penoxsulam mixed with diflufenican against weeds in transplanted rice

    • 摘要: 吡氟酰草胺属于类胡萝卜素生物合成抑制剂类除草剂,为明确其与乙酰乳酸合成酶抑制剂类除草剂五氟磺草胺复配的联合作用及复配剂对水稻移栽田杂草的田间防效,采用温室盆栽法,评价了二者复配后的除草活性及联合作用类型,并通过田间小区试验评价了复配制剂对水稻田杂草的防效和对水稻的安全性。温室盆栽试验结果表明:五氟磺草胺与吡氟酰草胺复配后对稗、马唐、异型莎草及鳢肠的活性均表现为相加作用,二者复配的合适配比 (质量比) 范围为 (1~2) : (5~10)。田间小区试验结果表明,于水稻移栽后8 d茎叶喷雾处理,300 g/L五氟磺草胺 • 吡氟酰草胺 (1 : 5) 悬浮剂对水稻生长安全,且对水稻田稗、异型莎草、耳叶水苋及丁香蓼有良好的防效:在有效成分用量112.5~135.0 g/hm2剂量下,药后35 d,复配悬浮剂对上述杂草的总草株防效和总草鲜重防效分别为93.8%~95.8%和94.1%~96.1%,尤其是显著提高了对较难防除型杂草耳叶水苋及丁香蓼的防效,整体防效显著高于对照两个单剂处理及当地常规用药22%苄嘧磺隆 • 乙草胺可湿性粉剂处理。五氟磺草胺与吡氟酰草胺复配能够在扩大杀草谱的同时提高防效,且对水稻安全,可用于水稻移栽田防除多种一年生杂草。

       

      Abstract: Diflufenican is a carotenoid biosynthesis inhibiting herbicide, the synergistic effect, and field efficacy of diflufenican mixed with acetolactate synthase inhibiting herbicide penoxsulam against weeds in rice were evaluated in greenhouse and field. The results showed that penoxsulam combined with diflufenican exhibited an additive effect for the control of Echinochloa crusgalli, Digitaria sanguinalis, Cyperus difformis and Eclipta prostrata. When the dose ratio of penoxsulam and diflufenican was (1-2)﹕(5-10), the weed control efficacy was higher than penoxsulam or diflufenican applied alone. The results of field experiments showed that the penoxsulam + diflufenican 300 g/L SC was safe for transplanted rice, and had good efficacy against E. crusgalli, C. difformis, Ammannia arenarid, and Ludwigia prostrata by spraying treatment on stem and leaf of rice 8 days after transplanting, especially to the notorious weeds such as A. arenarid and L. prostrata. The ratios of weed density and the fresh weight reduction were 93.8%-95.8% and 94.1%-96.1% 35 days after treatment with the doses of the active ingredients as 112.5-135.0 g/hm2. The mixtures had significantly higher control efficacy than the conventional herbicides bensulfuron methyl + acetochlor 22% WP and penoxsulam or diflufenican alone. The combination of penoxsulam and diflufenican was safe for rice and could expand the weed control spectrum with high efficacy, which could be used in transplanted rice fields for annual weed control.

       

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