eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2021-09-30 14 3 1655 1659 10.13005/bpj/2266 40648 article I GustiAgung Gede Bawa 1 Ni Wayan Bogoriani 1 Department of Chemistry, Faculty of Mathemathic and NuturalScience, Udayana University, Campus Bukit Jimbaran Badung Bali Indonesia The purpose of this study was observe the antifungal activity of the bark extract of Michelia alba against Curvularia verruculosa fungal of the cause of leaf spot disease in rice. The antifungal activities was carried out using the diffusion well, colony, biomass formation methods. The bark extract of Michelia alba has showed the antifungal activity against Curvularia verruculosa fungal with a minimum inhibition concentratiotn value to be 0.5%. The bark extract of Michelia alba  with 2.0% concentration can strongly inhibit the growth of C. Verruculosa with inhibiting capabality is 33.17 mm. This extract at  0.6% concentration was able to completely inhibit the growth of fungal colony and at 2.0% concentration has been able to inhibit completely the biomass formation of C. Verruculosa fungal for a 14-day period of incubation. https://biomedpharmajournal.org/vol14no3/antifungal-activity-of-the-bark-extract-of-michelia-alba-against-curvularia-verruculosa-fungal-the-cause-of-leaf-spot-disease-on-rice/ Bark Extract of Michelia Alba  Biomass formation  C. Verruculosa  Fungal colony  Minimum inhibition concentration