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 <em>Anethum graveolens </em>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 <em>Rhynchosporium secalis</em> and <em>Pyrenophora tritici-</em><em>repentis</em>. 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 <em>P. tritici-repentis</em> was 91.17% and the methanolic extract inhibited <em>R. secalis </em>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.