Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (4): 661-669.DOI: 10.3969/j.issn.1004-1524.2021.04.11

• Plant Protection • Previous Articles     Next Articles

Identification of causal agent and dynamics survey of celery stalk basal rot and screening of fungicides

WANG Guorong1(), FENG Xiaoxiao2, WU Huiming3, CAO Tingting4, LI Qian5, ZHENG Yongli6,*()   

  1. 1. Xiaoshan Agricultural Technology Extension Center, Hangzhou 311203, China
    2. Agricultural Experiment Station, Zhejiang University, Hangzhou 310058, China
    3. College of Agriculture and Food Science, Zhejiang A & F University, Hangzhou 311300, China
    4. Zhejiang Plant Protection Quarantine and Pesticide Management Station, Hangzhou 310020, China
    5. College of Life Sciences, China Jiliang University, Hangzhou 310018, China
    6. Zhejiang Agricultural Products Quality and Safety Center, Hangzhou 310003, China
  • Received:2020-07-14 Online:2021-04-25 Published:2021-04-25
  • Contact: ZHENG Yongli

Abstract:

In order to characterize the causal agent and occurrence of celery stalk basal rot in Hangzhou, Zhejiang province and effective fungicides, the dynamic survey of celery stalk rot in field was investigated in 2017-2018, the pathogen was isolated and identified by tissue separation, morphological and phylogenetic analysis and its pathogenicity was determined by mycelial suspension inoculation, the inhibition of 29 common fungicides were determined by mycelial growth rate method, and field control experiment were conducted as well. The results showed that frequent occurrence of celery stalk basal rot was during June to September. Fusarium oxysporum was the pathogenic fungus that caused celery stalk basal rot. In vitro screening test showed that thiophanate-methyl and tebuconazoles fungicides had the best inhibitory effect on mycelial growth of pathogenic F. oxysporum, and field application of 75% trifloxystrobin·tebuconazole WDG and 70% thiophanate-methyl WP had better control effect on celery stalk basal rot.

Key words: celery stalk basal rot, Fusarium oxysporum, fungicide

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