Antifungal activity and evaluation of phenolics contents of dill Anethum graveolens L. extracts original from Algeria

Abstract

The present study aims to evaluate the antifungal activity of dill Anethum graveolens L. against two fungus pathogens of cereals in Algeria, where quantification of the secondary metabolite was investigated in different plant part (whole plant, seeds) and two soil conditions, one is non-salty and second salty soil.The polyphenols, flavonoids, and tannins ranged from 6.25±0.74 mg/g dried weight for the tannins to 167±9.47 mg/g dried weight for polyphenols. The antifungal activity of extracts was tested against Rhynchosporium secalis and Pyrenophora tritici-repentis. The mycelial growth of the tested fungi was also determined to evaluate the antifungal activity. The ideal concentration showed a significant reduction of the two tested fungi was found to be 10 mg/mL, and the mycelial growth inhibition was determined after 7 days of incubation. Observations on the mycelial growth after extracts treatment decreased growth diameters. The effect of the hexanoic extract on inhibition of P. tritici-repentis was 91.17% and the methanolic extract inhibited R. secalis at 93.42% as the highest inhibition rate. Thus, the extract of dill could be used to control fungus pathogens as a potential source of eco-friend fungicide.