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Coffee berry disease (CBD) is a calamitous anthracnose of green berries of  Coffea arabica  L. caused by a fungal pathogen  Colletotrichum kahawae  Waller &amp; Bridge. Coffee yield losses reach 80–100% on susceptible cultivars if effective control is not properly implemented. The antagonistic potential of 23 native bacterial strains, collected from Arabica coffee tree, was assayed against the fungus under  in vitro  and  in vivo  conditions. The strains were first tested for their antifungal activities on mycelia growth inhibition and suppression of conidia germination. Those promising strains were further evaluated for disease reduction and biocontrol efficacy in detached green berries and seedling hypocotyls of highly- and moderately- susceptible coffee cultivars. Among others,  Bacillus cereus  ECk-03,  B. megaterium  ECk-05,  B. mycoides  ECk-06, and  Pseudomonas spinosa  ECk-17 showed significantly ( P  &lt; 0.05) greater mycelia growth inhibition (67–87%) and higher suppression of conidia germination (85–90%). The infection of berries and seedling hypocotyls by  C. kahawae  were almost prevented and thereby significantly ( P  &lt; 0.05) reduced severity of CBD (&gt;75–80%) was achieved in highly and moderately susceptible coffee cultivars ‘ cv . 370’ and ‘ cv . 74110’ treated with  Bacillus megaterium  ECk-05,  B. mycoides  ECk-06 and  P. spinosa  ECk-17. The strains demonstrated the highest CBD reduction and pronounced biocontrol efficacy (&gt;70%) at 48 h pre-fungal inoculation. The consistent performance of  Bacillus megaterium ECk-05,  B. mycoides ECk-06 and  P. spinosa ECk-17 strains in antifungal activities and higher disease reduction suggest as potential biocontrol for the management of CBD encouraging organic coffee production.

Biocontrol potentials of native bacterial strains for the management of coffee berry disease ( Colletotrichum kahawae ) in Ethiopia