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中国农学通报 ›› 2023, Vol. 39 ›› Issue (8): 106-111.doi: 10.11924/j.issn.1000-6850.casb2022-0251

• 植物保护 • 上一篇    下一篇

2株甘薯强致病力镰刀菌的室内药剂筛选

陈新亮(), 陈景益, 罗忠霞, 王章英, 房伯平, 王小斌, 黄立飞()   

  1. 广东省农业科学院作物研究所/广东省农作物遗传改良重点实验室,广州 510640
  • 收稿日期:2022-04-02 修回日期:2022-06-30 出版日期:2023-03-15 发布日期:2023-03-14
  • 通讯作者: 黄立飞,男,1979年出生,山西左权人,副研究员,博士,主要从事甘薯抗病育种研究。510640 广东省广州市天河区五山金颖西二街18号 广东省农业科学院作物研究所,Tel:020-85514242,E-mail:hlf157@163.com。
  • 作者简介:

    陈新亮,男,1982年出生,河南叶县人,助理研究员,学士,研究方向:甘薯育种。通信地址:510640 广东省广州市天河区五山金颖西二街18号 广东省农业科学院作物研究所,Tel:020-85514242,E-mail:

  • 基金资助:
    财政部和农业农村部国家现代农业产业技术体系资助(CARS-10-C17); 财政部和农业农村部国家现代农业产业技术体系资助(CARS-10-B5); 广东省重点领域研发计划项目(2020B020219001); 作物种质资源保护与利用专项(NWB014)

Indoor Fungicide Screening for Two Strains of Fusarium Spp. with Strong Pathogenicity to Sweet Potato

CHEN Xinliang(), CHEN Jingyi, LUO Zhongxia, WANG Zhangying, FANG Boping, WANG Xiaobin, HUANG Lifei()   

  1. Crop Research Institute, Guangdong Academy of Agricultural Sciences/ Guangdong Key Laboratory of Crops Genetics and Improvement, Guangzhou 510640
  • Received:2022-04-02 Revised:2022-06-30 Online:2023-03-15 Published:2023-03-14

摘要:

爪哇镰刀菌和尖孢镰刀菌对甘薯具有强致病力,为了筛选对2种病原菌防效较好的药剂,采用菌丝生长速率法分别测定多菌灵、甲基硫菌灵、腐酶利、肟菌·戊唑醇、唑醚·代森联、咪鲜胺、中生菌素和四霉素对2株甘薯致病镰刀菌的室内毒力。结果表明,对爪哇镰刀菌菌株菌丝生长抑制作用最强的为四霉素和咪鲜胺,EC50分别为1.292、2.145 μg/mL,其次为中生菌素和肟菌·戊唑醇,EC50分别为16.652、28.641 μg/mL,腐酶利、甲基硫菌灵、多菌灵和唑醚·代森联对爪哇镰刀菌菌株的抑制作用最差,EC50分别为440.540、637.120、680.765 μg/mL和22385.367 μg/mL;对尖孢镰刀菌菌株菌丝生长抑制作用最强的为四霉素、咪鲜胺和肟菌·戊唑醇,EC50分别为0.03、0.131 μg/mL和0.177 μg/mL,其次为中生菌素和多菌灵,EC50分别为3.66、14.408 μg/mL。甲基硫菌灵和唑醚·代森联对尖孢镰刀菌菌株菌丝生长抑制作用较差,EC50分别为28.611、59.78 μg/mL,腐酶利抑制作用最差,EC50为379.426 μg/mL。四霉素和咪鲜胺对2种病原菌的生长均有明显的抑制作用,2种病原菌对不同药剂的敏感性存在显著差异,尖孢镰刀菌对8种药剂的敏感性明显高于爪哇镰刀菌。

关键词: 甘薯, 爪哇镰刀菌, 尖孢镰刀菌, 毒力测定

Abstract:

Fusarium solani-melongenae and Fusarium oxysporum have strong pathogenicity to sweet patato. To screen effective fungicides to control them, the indoor toxicity of eight fungicides to the two strains of Fusarium spp. pathogens were detected by using mycelial growth rate method, and the eight fungicides were carbendazim, thiophanate-methyl, procymidone, trifloxystrobin·tebuconazole, pyraclostrobin·metiram, prochloraz, zhongshengmycin and tetramycin. The results showed that tetramycin and prochloraz were found to be the most effective fungicides inhibiting the mycelial growth of Fusarium solani-melongenae, and the mean effective concentration (EC50) value was 1.292 μg/mL and 2.145 μg/mL, respectively. The EC50 value of zhongshengmycin and trifloxystrobin·tebuconazole was 16.652 μg/mL and 28.641 μg/mL respectively, also effective against Fusarium solani-melongenae. However, procymidone, thiophanate-methyl, carbendazim and pyraclostrobin·metiram, with EC50 value of 440.540, 637.120, 680.765 and 22385.367 μg/mL respectively, were less effective against Fusarium solani-melongenae. Tetramycin, prochloraz and trifloxystrobin·tebuconazole were the most effective fungicides inhibiting the mycelial growth of Fusarium oxysporum, and the mean effective concentration (EC50) value was 0.03, 0.131 and 0.177 μg/mL, respectively. Zhongshengmycin and carbendazim were also effective against Fusarium oxysporum, and the EC50 value was 3.66 μg/mL and 14.408 μg/mL, respectively. Thiophanate-methyl and pyraclostrobin·metiram had poor inhibitory effect on the mycelial growth of Fusarium oxysporum strains, with EC50 of 28.611 μg/mL and 59.78 μg/mL, respectively. The inhibitory effect of procymidone was the worst, its EC50 value was 379.426 μg/mL. Overall, tetramycin and prochloraz could obviously inhibit the two strains of Fusarium spp., and there were significant differences of the sensitivity of the two strains of Fusarium spp. to different fungicides. The sensitivity of Fusarium oxysporum to the eight fungicides was higher than that of Fusarium solani-melongenae.

Key words: sweet potato, Fusarium solani-melongenae, Fusarium oxysporum, toxicity test