Welcome to Chinese Journal of Biological Control,Today is

Chinese Journal Of Biological Control ›› 2020, Vol. 36 ›› Issue (3): 388-395.DOI: 10.16409/j.cnki.2095-039x.2020.03.015

• RESEARCH REPORTS • Previous Articles     Next Articles

Screening and Biocontrol of Antagonistic Bacillus against Celery Soft Rot

LI Lei, ZHAO Yurong, ZHENG Fei, SHI Yanxia, CHAI Ali, XIE Xuewen, LI Baoju   

  1. Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2019-11-25 Online:2020-06-08 Published:2020-06-12

Abstract: A biocontrol bacterium ZF75 isolated from the rhizosphere soil of celery had significant inhibitory effecton Pectobacterium carotovorum subsp. odoriferum. Based on biological characteristics, physiological and biochemical characteristics, and multilocus sequence analysis, the strain ZF75 was identified as Bacillus amyloliquefaciens. Plate confrontation assay demonstrated that strain ZF75 has strong inhibitory effects against ten pathogens such as Xanthomonas campestris pv. vesicatoria. Potted plant test in greenhouse indicated that strain ZF75 significantly reduced disease incidence of celery bacterial soft rot, with the control efficacy of 89.62%. Meanwhile, strain ZF75 could significantly promote the plant growth, drenching treatment with strain ZF75 increased plant height and stem diameter by 24.18 cm and 0.51 cm, respectively. In summary, the strain ZF75 is a potential biocontrol agent to be applied in the field.

Key words: celery, soft rot disease, Bacillus amyloliquefaciens, biological control

CLC Number: