Evaluation antifungal properties of aqueous, acetone and alcohole extracts of Quercus brantii Lindl. var. persica (Jaub and Spach) Zohary

One of the new and safe methods for controlling plant diseases is the use of herbal essences and extracts. It has been determined that the extracts from oak galls have multiple medicinal and therapeutic properties and also have high antimicrobial properties. The present investigation aimed to evaluate the antifungal activities of compounds extracted from oak (Quercus brantii var. persica) gall formed by Aphelonyx persica wasp against a number of important phytopathogenic fungi (Phytophthora, Pythium, Fusarium and Alternaria). After preparation of the aqueous, acetone and methanol extracts of A. persica galls, in different tests, the appropriate agar and liquid media containing various concentrations of extracts were prepared and weight average, growth and sporulation of fungal colonies were evaluated and then compared with the controls. Findings of this study demonstrated that the antifungal properties of the A. persica gall extract were concentration-dependent where its antifungal effect was increased with increasing the extract concentration. The data analysis revealed that none of the gall extracts concentrations significantly affected the growth and weight of fungal colonies, while the alcoholic extract in high doses (50 and 70 mg/ml) inhibited sporulation significantly; therefore, more comprehensive research is needed in future studies on its drug use.