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农学学报

农学学报 ›› 2022, Vol. 12 ›› Issue (2): 20-25.doi: 10.11923/j.issn.2095-4050.cjas2020-0204

所属专题： 生物技术

• 植物保护 • 上一篇    下一篇

马唐和反枝苋对草甘膦的抗药性

陈仕红(), 冉海燕, 兰献敏, 何秀龙, 叶照春()   

  1. 贵州省农业科学院植物保护研究所,贵阳 550006
  • 收稿日期:2021-02-05 出版日期:2022-02-20 发布日期:2022-03-16
  • 通讯作者: 叶照春 E-mail:837198632@qq.com;yezhaochun1@163.com
  • 作者简介:陈仕红,女,1991年出生,贵州遵义人,助理研究员,硕士,主要从事杂草防控与除草剂抗性研究。通信地址：560006 贵州省贵阳市花溪区金竹镇农科院植保所,Tel：13158118746,E-mail： 837198632@qq.com。
  • 基金资助:
    黔农科院青年基金“贵州农田优势杂草对草甘膦敏感性研究”([2018]65号)

Glyphosate Resistance of Digitaria sanguinalis and Amaranthus retroflexus

CHEN Shihong(), RAN Haiyan, LAN Xianmin, HE Xiulong, YE Zhaochun()   

  1. Institute of Plant Protection, Guizhou Academy of Agricultural Science, Guiyang 550006, Guizhou, China
  • Received:2021-02-05 Online:2022-02-20 Published:2022-03-16
  • Contact: YE Zhaochun E-mail:837198632@qq.com;yezhaochun1@163.com

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摘要：

旨在明确贵州农田优势杂草马唐和反枝苋对草甘膦的抗药性水平,为杂草的抗性治理提供理论依据。以32个马唐和30个反枝苋的不同种群为研究试材,采用整株盆栽法,施药2周后测定草甘膦对杂草地上部分的鲜重抑制率。结果表明：毕节七星关区六合村马唐种群敏感性最低,ED50值为16.23 g a.i/hm2,其他种群相对抗性倍数在1.0~5.3之间,马唐有12个种群处于敏感阶段,17个种群处于低水平抗性,1个种群处于中等抗性水平;赫章县双坪乡反枝苋种群ED50值最低,为15.38g a.i/hm2,其他种群相对抗性倍数在1.0~9.0之间,反枝苋12个种群处于敏感阶段,14个种群处于低水平抗性,4个种群处于中等抗性水平。从结果来看,贵州省范围内不同马唐和反枝苋种群对草甘膦都产生了不同程度的抗性,但大多数马唐和反枝苋种群均处于敏感阶段或低抗药性水平。

关键词: 马唐, 反枝苋, 草甘膦, 抗药性

Abstract:

The aim is to clarify the glyphosate resistance level of Digitaria sanguinalis and Amaranthus retroflexus from farmland in Guizhou, and to provide a theoretical basis for the resistance management of weeds. 32 populations of D. sanguinalis and 30 populations of A. retroflexus were used as experimental materials. The whole plant pot method was used to determine the fresh weight inhibition rate of glyphosate on the aboveground parts of weeds after two weeks of drug application. The results showed that: the sensitivity of D. sanguinalis population in Liuhe village of Qixingguan District of Bijie was the lowest, with ED50 value of 16.23 g a.i/hm2, and the relative resistance ratios of other populations ranged from 1.0 to 5.3, 12 populations of D. sanguinalis were in the sensitive stage, 17 populations had low level of resistance, and 1 population had medium level of resistance. The ED50 value of A. retroflexus population in Shuangping township of Hezhang County was the lowest, with ED50 value of 15.38 g a.i/hm2, the relative resistance ratios of other populations ranged from 1.0 to 9.0, 12 populations of A. retroflexus were in the sensitive stage, 14 populations had low level of resistance, and 4 populations had medium level of resistance. In conclusion, different populations of D. sanguinalis and A. retroflexa have different degrees of resistance to glyphosate in Guizhou Province, but most of them are in the sensitive stage or low drug resistance level.

Key words: Digitaria sanguinalis, Amaranthus retroflexus, glyphosate, drug resistance