Resumo

CUBILLOS HINOJOSA, Juan Guillermo; PAEZ REDONDO, Alberto  e  MEJIA DORIA, Lauris. EVALUATION OF THE BIOCONTROL CAPACITY OF TRICHODERMA HARZIANUM RIFAI AGAINST FUSARIUM SOLANI (MART.) SACC. ASSOCIATED TO THE COMPLEX "DRYER" IN PASSION FRUIT UNDER GREENHOUSE CONDITIONS. Rev. Fac. Nac. Agron. Medellín [online]. 2011, vol.64, n.1, pp.5821-5830. ISSN 0304-2847.

In the banana zone of Magdalena in Colombia has been reported a 30% decrease in crop production of passion fruit (Passiflora edulis var. Flavicarpa) due to the death of plants caused by the Dryer or vascular wilt disease, which is associated with the fungus Fusarium solani. In order to help manage of the disease was evaluated under greenhouse conditions the effect of the biocontrol strain native TCN-014 and CCL-005 commercial strain of Trichoderma harzianum against F. solani. For the evaluation were used plants with two months of age, set in the greenhouse; were tested two times of application of the antagonist: (1) inoculating the antagonist five days after of pathogen agent, and (2) inoculating the antagonist five days before the pathogen. The experiment was established under an experimental design of randomized blocks with 2x3 factorial arrangement, and data were submitted to analysis of variance (ANOVA) and comparison of averages using the multiple range test of Duncan. Results indicated that to inoculate the antagonist before the pathogen is obtained a better biocontrol effect of F. solani using concentrations of 106 and 108 conidia/ mL of both native and commercial strains. The results suggest an effective action of T. harzianum as a biocontrol of F. solani, showing that it can perform field studies in order to develop a byproduct for ecological management of wilt in cultivation of passion fruit.

Palavras-chave : Biological control; Passiflora edulis var; flavicarpa; antagonist; tropical fruits.

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