草地学报 ›› 2022, Vol. 30 ›› Issue (5): 1122-1130.DOI: 10.11733/j.issn.1007-0435.2022.05.012

• 研究论文 • 上一篇    下一篇

蒙古黄芪根腐病病原鉴定及防治药剂室内筛选

马桂花1, 段晓明1,2, 徐文华3, 周渊涛1, 马海霞1, 马伟丽1, 祁鹤兴1   

  1. 1. 青海大学农牧学院, 青海 西宁 810016;
    2. 青海正德农牧开发有限公司, 青海 西宁 810016;
    3. 中国科学院西北高原生物研究所, 青海 西宁 810016
  • 收稿日期:2021-11-08 修回日期:2021-12-29 出版日期:2022-05-15 发布日期:2022-06-06
  • 通讯作者: 祁鹤兴,E-mail:qhx390495559@126.com
  • 作者简介:马桂花(1998-),女,回族,青海大通人,本科在读生,主要从事植物病理学研究,E-mail:2357485344@qq.com
  • 基金资助:
    中央财政林草科技推广示范项目"大黄、黄芪等中藏药材标准化种植技术集成与推广"(019-TG-05);青海大学2020年科研启动金(4139040111)资助

Identification and Laboratory Screening of Chemical Agents of Root Rot Pathogens of Astragalus membranaceusvar. mongholicus

MA Gui-hua1, DUAN Xiao-ming1,2, XU Wen-hua3, ZHOU Yuan-dao1, MA Hai-xia1, MA Wei-li1, QI He-xing1   

  1. 1. College of Agriculture and Animal Husbandry, Qinghai University, Xining, Qinghai Province 810016, China;
    2. Qinghai Zhengde Agriculture and Animal Husbandry Development Ltd., Xining, Qinghai Province 810016, China;
    3. Northwest Institute of Plateau Biology, the Chinese Academy of Science, Xining, Qinghai Province 810016, China
  • Received:2021-11-08 Revised:2021-12-29 Online:2022-05-15 Published:2022-06-06

摘要: 为鉴定青海省民和地区蒙古黄芪(Astragalus membranaceusvar.mongholicus)根腐病病原菌及筛选防治该病害的有效杀菌剂,本研究基于形态学特征、rDNA-ITS,TEF-1α和RPB2序列分析对蒙古黄芪根腐病病原进行鉴定,并利用菌丝生长速率法测定8种杀菌剂对病原菌的抑制作用。结果发现,引起黄芪根腐病的病原菌为腐皮镰刀菌(Fusarium soani)、逗号镰刀菌(F.virguliforme)、木贼镰刀菌(F.equiseti)和锐顶镰刀菌(F.acuminatum)。室内药剂试验表明硅唑·咪鲜胺对4种镰刀菌的抑制作用最好,EC50在0.195~0.588 mg·L-1之间;多菌灵对腐皮镰刀菌、木贼镰刀菌和锐顶镰刀菌的抑制作用较强,EC50在0.113~0.869 mg·L-1之间;咯菌腈对逗号镰刀菌、木贼镰刀菌和锐顶镰刀菌的抑制作用较强,EC50在0.153~0.390 mg·L-1之间;甲基硫菌灵、噁霉灵、溴菌腈和石硫合剂对4种镰刀菌的抑制作用较差,EC50在1.018~4.360 mg·L-1之间。试验结果为生产上合理选用杀菌剂防治黄芪根腐病提供了科学依据。

关键词: 黄芪根腐病, 镰刀菌, 系统发育分析, 杀菌剂筛选

Abstract: In this study,the pathogens of A. membranaceusvar. mongholicusroot rot collected from Minhe county,Qinghai province were identified based on morphological characteristics,rDNA-ITS,TEF-1α,and RPB2 sequences analysis. The inhibition effects of eight fungicides on the pathogens were also determined by the mycelial growth rate method for screening effective fungicide. Results showed that Fusarium soani,F. virguliforme,F. equiseti and F. acuminatum caused root rot of A. membranaceusvar.mongholicus. Laboratory fungicide experiment demonstrated that silicon azole·prochloraz had a strong inhibition effect on four Fusarium species,the value of EC50was 0.195~0.588 mg·L-1. Carbendazim had a strong inhibition effect on F. soani,F. equiseti and F. acuminatum,the value of EC50was 0.113~0.869 mg·L-1. Fludioxonil had a strong inhibition effect on F. virguliforme,F. equiseti and F. acuminatum,the value of EC50was 0.153~0.390 mg·L-1. The inhibition effect of thiophanate-methyl,hymexazol,bromothalonil,and lime sulphur was worse,the value of EC50was 1.018~4.360 mg·L-1. The results provide a scientific basis for using fungicides to control root rot in A. membranaceus var. mongholicus production.

Key words: Root rot of A.membranaceus, Fusarium, Phylogenetic analysis, Screening of fungicide

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