Molecular characterization, pathogenicity and copper sensitivity of Xanthomonas citri pv mangiferaeindicae, the causal agent of mango bacterial black spot disease in Ghana
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor & Francis Group
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 sus pected 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.
Description
Research Article
Keywords
Mango, bacterial black spot, bacterium, Xanthomonas citri pv mangiferaeindicae, cpn60 gene