The effect of volatile oils of some species of the Pinus Sp. in inhibiting the growth of Alternaria alternate, Fusarium solani and Rhizoctonia sp. in the laboratory

Abstract

These investigations carried out in 2022-2023, at faculty of Agriculture, Damascus University, to determine the antifungal activity of volatile oils of some pine trees in inhibiting the growth of Alternaria alternate, Fusarium solani and Rhizoctonia sp. on PDA in laboratory.

The results showed that volatile oils of studied species gave significant inhibition to growth the tested fungi compared with the control. Volatile oils of Pinus pinea L. and Pinus halepensis Mill. gave the superior inhibition effect to the Alternaria alternate (Fr.) Keissl., Fusarium solani (Mart.) Sacc. and Rhizoctonia sp. fungi, where gave the median effective dose (EC₅₀) values for inhibition of mycelial growth of fungi 18.23, 21.47 and 18.96  (Pinus pinea L) and 22.26, 24.79 and 28.92  (Pinus halepensis Mill.) for three fungi, respectively. While, that volatile oils of Pinus brutia Ten. gave the lower inhibition effect on the tested fungi. However, the volatile oils of P. pinea and P. halepensis could be used to control the fungi.