Paper Title
Antifungal Effect Of Some Plants Crude Extracts Against The Causative Agent Of Bayoudh Disease

Abstract
The vegetation of the south-western Algeria region is characterized by a set of endemic taxa and has many plants used in traditional medicine. In this study, four plants from this region (Algerian Sahara) were used to evaluate their extracts for the antifungal activity. Certain plant pathogenic fungi produce cellulase, along with other cell wall degrading enzymes, thus enabling them to hydrolyze the cell walls of host plants and facilitate the penetration of mycelia into the cells. The current research concerns essentially the study of inhibition activity on the cellulases of Fusarium oxysporum f. sp. albedinis (Foa) , which is a soil borne fungus causing the most serious disease of date palm (Phoenix dactylifera L.) called “Bayoudh’’. The results of the antifungal activity, by the technique of the contact bioautography, showed that some extracts of the selected plants present a significant effect on the cellulases of Fusarium oxysporum f. sp. albedinis. The diversity of natural substances was observed in these extracts. Antifungal effects were mostly represented by the dichloromethanic extract of Launeae arborescens and the ethyl acetate extract of Citrullus colocynthis. Keywords: Medicinal Plants, Antifungal Activity, Fusarium Oxysporum F. Sp. Albedinis, Cellulases Inhibition.