Molecular characterization, pathogenicity and copper sensitivity of Xanthomonas citri pv mangiferaeindicae, the causal agent of mango bacterial black spot disease in Ghana

Joseph O. Honger, Samuel Osabutey, Seloame Tatu Nyaku, John B. Lambon

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Recent outbreak of the mango bacterial black spot disease has resulted in massive damages to the Ghanaian mango industry. Research was carried out to confirm the etiology of the disease. Diseased mango fruits and leaves were collected from Greater Accra (Asutuare and Dodowa), Eastern (Akuse, Somanya) and Volta (Juapong) regions, and the suspected causal bacterium was isolated. The pathogen was identified as Xanthomonas citri pv mangiferaeindicae based on cultural and morphological characteristics and sequence analysis of the cpn60 gene. The pathogenicity of the bacterial pathogen on mango and cashew was determined and its sensitivity to some selected copper based fungicides available in Ghana was evaluated by the agar diffusion bio-assay. All strains of the pathogen were able to cause disease symptoms on artificially inoculated mango and cashew leaves. The pathogen was highly sensitive to Copper oxychloride, Copper hydroxide and Coprous oxide at very low concentrations.

Original languageEnglish
Pages (from-to)1703-1721
Number of pages19
JournalArchives of Phytopathology and Plant Protection
Volume54
Issue number19-20
DOIs
Publication statusPublished - 2021

Keywords

  • Mango
  • Xanthomonas citri pv mangiferaeindicae
  • bacterial black spot
  • bacterium
  • cpn60 gene

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