Fusarium wilt, caused by Fusarium oxysporum fungi has become an important melon disease, due to great losses in the production areas in Brazil and in the world. Therefore, the objective of the present work was to evaluate efficacy of ethanolic extracts of Senna alata parts in the control of F. oxysporum micelial growth, isolated of melon plants. The experimental design was entirely randomized distributed in factorial scheme 4 x 6 + 1, being the first factor parts of the plant (stalk, leaf, root, and green bean), and as second, six concentrations (0.25; 0.50, 50, 75, 250, 500 µg mL-1), plus the control, with four repetitions per treatment. The variables evaluated were: rate of mycelial growth, inhibition of the mycelial growth (IGM) and area under the curve of the mycelia growth. Ethanolic extracts of all Senna alata parts were efficient in control of F. oxysporum. Extracts of root and string bean were most efficient in inhibiting the mycelial growth of F. oxysporum, in 500 µg mL-1 concentration.
vegetable fungicide; antimicrobial activity; Cucumis melo
