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草业学报 ›› 2014, Vol. 23 ›› Issue (6): 259-265.DOI: 10.11686/cyxb20140631

• 论文 • 上一篇    下一篇

抗二氯喹啉酸稗草对6种除草剂的多抗性分析及田间控制效果评价

马国兰,柏连阳*,刘都才*,刘雪源,唐涛,彭亚军   

  1. 湖南省植物保护研究所,湖南 长沙 410125
  • 收稿日期:2014-03-18 出版日期:2014-12-20 发布日期:2014-12-20
  • 通讯作者: E-mail:bailianyang2005@yahoo.com.cn
  • 作者简介:马国兰(1977-),女,湖南邵阳人,副研究员
  • 基金资助:
    国家自然科学基金项目(31201530)和国家公益性行业科研专项(201303031)资助

Control of herbicide resistant Echinochloacrusgalli indirect-seeded rice crops

MA Guo-lan,BAI Lian-yang,LIU Du-cai,LIU Xue-yuan,TANG Tao,PENG Ya-jun   

  1. Hunan Plant Protection Research Institute, Changsha 410125, China
  • Received:2014-03-18 Online:2014-12-20 Published:2014-12-20

摘要: 稗草是稻田恶性杂草,二氯喹啉酸(quinclorac)是防治稗草的特效药,但长期使用出现了抗药性。为有效控制田间抗二氯喹啉酸的稗草,用室内盆栽法分析了五氟磺草胺、双草醚、嘧啶肟草醚、氟吡磺隆、噁唑酰草胺和氰氟草酯6种除草剂对抗性稗草的多抗性,并通过大田试验评价了上述6种除草剂对抗性稗草的防效。结果显示,五氟磺草胺等6种除草剂对不同生物型稗草R1、R2、S均表现出较高的生物活性,抗性稗草R1、R2对五氟磺草胺、双草醚、嘧啶肟草醚、氟吡磺隆、噁唑酰草胺和氰氟草酯6种除草剂抗性指数为1.05~1.28,无多抗性产生。使用6种药剂的田间推荐剂量处理,以2.5%五氟磺草胺OD和10%噁唑酰草胺EC对抗性稗草的防效最好,药后20和40 d的防效均在95%以上。其次是10%双草醚SC,药后20和40 d的防效均在90%以上。再次是5%嘧啶肟草醚EC,药后20和40 d的防效均在85%以上。10%氰氟草酯EC和10%氟吡磺隆WG对抗性稗草的防效最差,处理后20和40 d防效均不到85%。这进一步验证了五氟磺草胺、双草醚、嘧啶肟草醚、氟吡磺隆、噁唑酰草胺和氰氟草酯6种除草剂对抗二氯喹啉酸的稗草无多抗性产生。6种除草剂均可在稗草对二氯喹啉酸产生抗药性的稻区使用。但以五氟磺草胺、双草醚和噁唑酰草胺3种除草剂对抗药性稗草的防效最优。

Abstract: Barnyardgrass (Echinochola crusgalli) is one of the more problematic grass weeds in Chinese rice paddies. Continuous application of the herbicide quinclorac since 1990 has resulted in barnyard grass developing resistance to quinclorac. The efficacy of six herbicides; penoxsulam, bispyribac-sodium, pyribenzoxim, flucetosulfuron, metamifop and cyhalofop-butyl for controlling resistant barnyardgrass was determined using pot and field based experiments. The pot trial showed that all six herbicides had good biological activity against quinclorac resistant barnyardgrass. The field trial revealed that 2.5% penoxsulam OD and 10% metamifop EC, applied at 22.5 g/ha and 120 g/ha respectively produced control efficacies of more than 95.0% 20 and 40 d after application. The control efficacy of 10% bispyribac-sodium SC (30 g/ha) was greater than 90.0% while the efficacy of 5% pyribenzoxim EC (40 g/ha) was greater than 85.0% after 20 and 40 d. However 10% cyhalofop-butyl EC (90 g/ha) and 10% flucetosulfuron WG resulted in less than 85.0% control efficacy. The results indicate that penoxsulam and bispyribac-sodium effectively controlled barnyardgrass resistant to quinclorac.

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