In Vitro Antifungal Effect of Essential Oil-Based Biopesticides and Synthetic Fungicides against the Avocado Scab Pathogen Elsinoe perseae - Archive ouverte HAL Accéder directement au contenu
Poster De Conférence Année : 2023

In Vitro Antifungal Effect of Essential Oil-Based Biopesticides and Synthetic Fungicides against the Avocado Scab Pathogen Elsinoe perseae

Résumé

Avocado scab, caused by the fungus Elsinoe perseae, is a major disease in most avocado producing regions with warm and humid Climate 1. Scab causes aesthetic damage to the peel of the fruits leading to significant post-harvest losses due to fruit rejection at the packing houses 2. Although this pathogen causes economic losses and restricts the cultivation of soughtafter but highly susceptible Cultivars 3,4 , there are few available management approaches and almost none for organic growers. Our objective was to evaluate the in vitro antifungal activity of three essential oils (thyme oil, 'cinnamon oil, and tea tree oil) and three chemical fungicides (copper hydroxide, propiconazole, and fluazinam) against E. perseae. Six fungal isolates were obtained from infected tissues of the avocado cultivars Lula (n=2), Peterson, and Lima Late. Sensitivity to essential oils was assessed using an amended agar media assay with six concentrations of each essential oil. Colony diameter was used to determine EC50 values and minimal inhibitory concentrations within the tested isolates. Using an amended agar media assay, we determined that thyme oil (250 µl/l) and cinnamon oil (125 µl/l) inhibited E. perseae colony growth completely while tea tree oil only reduced E. perseae growth by 14% at the highest concentration tested (2000 µl/l). Sensitivity tests using synthetic fungicides showed that propiconazole (134 mg/l) completely inhibited the growth of the pathogen while copper hydroxide and fluazinam reduced the radial growth at 84% and 56%, respectively.
Fichier principal
Vignette du fichier
In Vitro Antifungal Effect of Essential Oil-Based Biopesticides (Belizaire et al, 2023).pdf (1.81 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04339264 , version 1 (13-12-2023)

Licence

Domaine public

Identifiants

  • HAL Id : hal-04339264 , version 1

Citer

Christ Mane Belizaire, Lederson Gañán-Betancur, Ali Sarkhosh, Philip Harmon, Romina Gazis. In Vitro Antifungal Effect of Essential Oil-Based Biopesticides and Synthetic Fungicides against the Avocado Scab Pathogen Elsinoe perseae. MARNDR-PITAG. Deuxièmes Journées Scientifiques du PITAG - Contribution de la recherche-développement-formation à la souveraineté alimentaire en Haïti, Dec 2023, Port-au-Prince, Haiti. ⟨hal-04339264⟩

Collections

ORGANICEPRINTS
56 Consultations
54 Téléchargements

Partager

Gmail Mastodon Facebook X LinkedIn More