ISSN: 1659-2751

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Biological Control of Panama Disease (Fusarium oxysporum f. sp. cubense) Using Endophytic Fungi

Abstract

The objective of this study was to evaluate the effect of three isolates of endophytic fungi of Trichoderma atroviride, Endo 1, Endo 2 and Endo 3, for the biocontrol of the Panama disease in banana cultivar Gros Michel (AAA), caused by Fusarium oxysporum f. sp. cubense (Foc). Six week old vitroplants were protected in a spore suspension of 1×106 cfu/mL of each fungal endophytes, and two weeks later they were inoculated with pathogenic fungi isolates Foc 2 and Foc 4. The results indicated that the incubation period of the disease took five weeks after the inoculation with the pathogenic fungi, and the first symptom was the yellowing of the lower leaves of the plant. In the sixth week it showed signs of wilting in all treatments and the control. The effect of endophytic fungi represented no significant differences in the incidence of the disease since 100 % of the plants showed external symptoms. However, in the internal symptoms, significant differences among treatments and the control such as corm discoloration (vascular tissue of the plant) were identified. For the Foc 2, the value for the control was 3.5 and for the Foc 4, the value was 4.38.

Key words: banana, biological control, Fusarium oxysporum f. sp. cubense, Gros Michel (AAA), endophytic fungi, Panama disease, Trichoderma atroviride.

Artículo en español (pdf) (778)