Phenolic compounds inhibit viability and infectivity of the grapevine pathogens Diplodia seriata, Eutypa lata, Fomitiporia mediterranea, and Neofusicoccum parvum

Many fungal pathogens are associated with grapevine trunk diseases (GTDs), which cause important yield and economic losses in grape production. There no effective control methods against GTDs once plants infected, so research is aimed at preventive measures to avoid infections nurseries vineyards. Inhibitory activities of the phenolic compounds eugenol, epigallocatechin–3–O–gallate (EGCG) thymol GTD fungi Diplodia seriata, Eutypa lata, Fomitiporia mediterranea Neofusicoccum parvum were assessed vitro, planta as pruning wound treatments. Greatest inhibition pathogen mycelium growth was observed eugenol (fungistatic 1,500 µg mL–1, fungicidal 2,500 mL–1). No inhibitory activity EGCG. Minimum concentrations vitro effects on D. seriata N. spore germination 360 mL–1 for 750 eugenol. In protection tests, but not.