SciELO - Scientific Electronic Library Online

 
vol.27 número1Sensibilidad in vitro de Sclerotium rolfsii Saccardo, a Los Fungicidas Comúnmente Usados Para su CombateMicroorganismos Antagonistas para el Control del Complejo de Hongos Causantes de la Rabia del Garbanzo (Cicer arietinum L.) en el Estado de Sinaloa, México índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista mexicana de fitopatología

versión impresa ISSN 0185-3309

Resumen

MICHEL-ACEVES, Alejandro Casimiro et al. In vitro biocontrol of Fusarium subglutinans (Wollenweb. and Reinking) Nelson, Toussoun and Marasas and F. oxysporum Schlecht., causal agents of "Witches' broom" of mango (Mangifera indica L.) by Trichoderma spp.. Rev. mex. fitopatol [online]. 2009, vol.27, n.1, pp. 18-26. ISSN 0185-3309.

The antagonistic effect of native strains of Trichoderma spp. was evaluated in vitro against Fusarium oxysporum (Fo) and Fusarium subglutinans (Fs), causal agents of mango "witches' broom". Ten strains of the antagonistic fungus were isolated, one of which was selected and identified to the species level (T. harzianum); this species showed the highest percentage of antagonism inhibiting mycelial growth of Fo by 62.9% and 42.0% of Fs. In dual cultures between Fo and/or Fs with the selected strains of Trichoderma, the time for the first contact for Fo was between 3 and 4 days, and between 2 and 3 for Fs. The greatest intersection area (0.87 cm) was observed in T. lignorum against Fo, while the intersection area in Fs with the native strain Thzn-2 was 0.85 cm. Native strains Thzn-2 and Thzcf-12, and the commercial one showed antagonism class 2, being able to stop growth of both plant pathogens. Strain Thzn-2 is promising as an alternative for biocontrol of Fo and Fs; however, it is necessary to evaluate it under field conditions.

Palabras llave : Trichoderma harzianum; T. lignorum; antagonism; inhibition.

        · resumen en Español     · texto en Español     · pdf en Español