Trichoderma species in soils cultivated with mango and affected by mango malformation, and its inhibitory potential on Fusarium oxysporum and F. subglutinans.
Michel-Aceves A. C., Rebolledo-Domínguez O., Lezama-Gutiérrez R., Ochoa-Moreno M. E., Mesina-Escamilla J. C., Samuels G. J.
Author Affiliation: Depto. de Fitotecnia, Centro de Estudios Profesionales-Colegio Superior Agropecuario del Estado de Guerrero, Apdo. Postal 6 y 9, Iguala, Guerrero C.P. 40000, Mexico.
Revista Mexicana de Fitopatología 19 : 154-160
Abstract : The occurrence of native Trichoderma spp. strains in soil samples from 25 mango orchards affected with mango malformation (15 from the state of Guerrero and 10 from Colima, Mexico) and their capacity to inhibit Fusarium oxysporum and F. subglutinans (Gibberella fujikuroi var. subglutinans) growth were studied. Trichoderma spp. was isolated from soil samples by the dilution method 1:1000 (w/v) on acidified V8-Agar, incubated at 25°C for 7 days. Trichoderma populations varied among soils and states significantly. Some 105 isolates in 22 of the 25 orchards sampled were obtained; twenty five were selected for their capacity to inhibit Fusarium growth, corresponding to the following species: T. harzianum, T. virens, T. longibrachiatum, T. koningii and T. minutisporum. Trichoderma species isolated from soil in mango orchards represent a source of biological control agents against mango malformation.