Title : Evaluation of the antifungal activity of olive leaf extracts against filamentous fungi of stored soft wheat
Olive tree leaves (Oleaeuropeae.) were suited in order to valorize the one of the medicinal plants from the Algerian flora, growing spontaneously in the Blida region, Algeria.This study aims mainly to assess the antifungal potential of the aqueous and tannic extract. the antifungal properties of the obtained extracts were evaluated by the agar diffusion method and four fungal species isolated from stored soft wheat (Aspergillusflavus, Aspergillusniger, Aspergillusfumigatus, Aspergillusterreus and Mucor spp.) were assessed. Regarding the fungicidal potential of the tannic extract, the highest inhibition zone was obtained for the A.niger (25.33 ± 0.44 mm) strain, followed by A.flavus (19.33 ±0.88 mm), Mucor spp. (17.00 ± 0,33 mm) and A. fumigatus (16.66 ± 0.44 mm), mm) however the aqueous extract performed the highest effect on A.fumigatuswith inhibition zone diameterof (23,00± 0,33 mm), Mucor spp.(19.00 ± 0,33 mm), A niger and A. flavus recorded the same inhibition zonewith (19.33 ±0.88 mm). The results of the IMC show that the aqueous and the tannic extracts of the leaves of Oleaeuropaeaused at
low concentration could have significant potential for the biological control of fungal strains contaminating stored soft wheat..
Key words: Olea europeae, aqueous and tannic extracts, soft wheat, antifungal potential.