Armillaria root disease-caused mortality of avocado trees was associated with Armillaria mexicana Armillaria root disease-caused mortality of lychee trees was associated with Desarmillaria caespitosa Damping-off Enfermedades y plagas La calidad de la planta fue mayor en el sustrato a base de turba de musgo La incidencia de Fusarium circinatum fue menor en el sustrato a base de aserrín (78 %) Litchi chinensis Persea americana Pines stump could serve as Armillaria inoculum for avocado orchards established in cleared forest areas Pinus sp Se utilizaron tres sustratos hechos a base de turba de musgo, aserrín y corteza de pino The incidence of Fusarium circinatum was lower in the sawdust-based substrate (78 %) Three substrates made from peat moss, pine sawdust and pine bark were used Trichoderma harzianum and the sawdust-based substrate reduced the incidence of F. circinatum to 66 % Trichoderma harzianum y el sustrato a base de aserrín redujeron la incidencia de F. circinatum a 66 % antagonist antagonista aserrín corteza de pino gen tef1 peat moss pine bark pudrición de raíces root disease sawdust secadera tef1 gene turba de musgo Árboles