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Background: This work deals with the in vitro study of the antifungal effect of aqueous extracts of six medicinal plants (Zygophyllum album, Euphorbia guyoniana, Atriplex halimus, Oudneya africana, and Matricaria pubescens) in Wadi Righ region, at their inhibition of the mycelial growth of a tomato telluric fungus (Fusarium oxysporum f. sp. radicis lycopersici). Methods: The study of the antifungal activity of natural extracts was carried out according to the poisoned Food technique defined by Grover and Moore (1962). Results: The in vitro study of the antifungal properties shows that all the aqueous extracts of plant species tested inhibit the mycelial growth of this phytopathogenic agent except that of Moltkiopsis ciliata. In fact, the aqueous extract of Z. album was found to be a very inhibitory solution because it induced an inhibition rate of 75.29% against the Fusarium wilt of tomato after 8 days. Conclusion: the results indicate that the aqueous extracts studied can be considered as a very promising agent for the plant protection industry.

Biological control of Fusarium oxysporum f. sp. radicis lycopersici by using aqueous extracts of medicinal plants of Wadi Righ region