Investigating the combined effects of binary mixtures comprising essential oils and Azole fungicides on some plant pathogenic fungi

Abbod, Mohsen; Khallouf, Ezzat

doi:10.48311/jcp.2024.1659

Investigating the combined effects of binary mixtures comprising essential oils and Azole fungicides on some plant pathogenic fungi

https://doi.org/10.48311/jcp.2024.1659

Volume 13, Issue 2
June 2024

Pages 115-124

Document Type : Original Research

Authors

M. Abbod ¹

E. Khallouf ²

¹ Department of Plant Protection, Faculty of Agriculture, Al-Baath University, Homs, Syria.

² Department of Field Crops, Faculty of Agriculture, Al-Baath University, Homs, Syria.

Abstract

Combinations of traditional fungicides and natural compounds have the potential to produce more effective antifungal activity at sufficiently low concentrations. The potential fungicidal activity of binary mixtures comprising Coriandrum sativum and Foeniculum vulgare essential oils (E.O.s), as well as the two azole fungicides, Difenoconazole and Tebuconazole, were examined employing the n.n design. The concentration addition (C.A.) and independent action (I.A.) models were used to analyze the combined effects of the mixtures. In most mixtures, the essential oil enhanced the fungicidal activity of the azole fungicides. Mixtures containing Tebuconazole and F. vulgare exhibited a strong synergism, with an EC₅₀ value of 43.12 for Mix. 9. The model deviation ratio (M.D.R.) for the tested mixtures ranged from 0.61 to 13.61, indicating the absence of antagonistic interaction among the mixtures components. It was observed that the I.A. model tended to underestimate the fungicidal activity, while the C.A. model provided a more accurate prediction. Further studies are required to investigate the primary natural products in these essential oils responsible for the synergistic effect on the azole fungicides.

Keywords

Difenoconazole

Tebuconazole

Foeniculum vulgare

Coriandrum sativum

Synergism

Subjects

Chemical Control of Plant Diseases

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