Study on the treatment of root rot caused by Fusarium sp. on coffee trees by the antagonistic activity of microorganisms isolated in coffee-growing soil in Kon Tum Province, Vietnam

Vietnam, a significant coffee producer, and exporter, faces challenges due to root rot disease caused by Fusarium sp., which necessitates addressing. Utilizing microbial products to combat diseases is a safe and suitable approach, but it requires employing native microorganisms for optimal results. The research aimed to isolate microbial strains from areas with fungal presence and assess the antifungal properties of local bacteria and fungi. The study collected Fusarium sp., 31 bacterial strains, and nine mold strains from samples taken at five coffee nurseries in the Kon Ray district, Kon Tum province. Upon evaluating the antifungal activity, six bacterial strains and seven fungal strains demonstrated the ability to counteract Fusarium sp. Notably, two fungal strains, N1.1 and N1.3, and three bacterial strains, CF1.10, CF1.11, and CF4.9, exhibited exceptional antagonistic activity. Additionally, the research developed biological products to control Fusarium in coffee plants, drawing from the effectiveness of the aforementioned fungal control results.