Abstract

PEREZ VICENTE, Luis; BATLLE VIERA, Alicia; CHACON BENAZET, Julio  and  MONTENEGRO MORACEN, Virgen. Reaction of natural and hybrids cultivars of FHIA Bananas and Plantains to Cuban Fusarium oxysporum f . sp. cubense Populations, causal agent of Fusarium Wilt or Panama Disease. Fitosanidad [online]. 2009, vol.13, n.4, pp.237-242. ISSN 1562-3009.

Fusarium wilt by Fusarium oxysporum f.sp.cubense (Foc ) is one of the most important diseases of banana. The reaction of FHIA hybrids cultivars (cv.), diploids and landraces to artificial inoculations with Foc (VCGs 01210, race 1; 0124 and 0128, race 2) was studied. Foc inoculum was reproduced on Sorghum vulgare in trays in the lab. Fifteen grams of inoculated Sorghum seeds of each VCG were placed on the soil under each of five inoculated tissue culture plants. Manzano and Gros Michel cvs. were only susceptible to race 1 (VCG 01210).Burro CEMSA, Pisang awak and FHIA 03 were severely affected by isolates of race 2 (VCGs 0124 and 0128) and slightly by race 1. The cultivars FHIA 02 and FHIA 04 does not showed symptoms with any of the isolates tested. FHIA 18 was slightly affected by the races 1 and 2. It has been reported naturally affected in conducible soils to Foc . Adifferential reaction of the cultivars Pelipita, Pisang Jari Buaya and Paka against the GCVs 0124 y 0128 obtained from Burro Criollo (race 2) were observed, supporting the criteria that both isolates differs in pathogenicity to other cultivars and belong to different races. The results indicate that the current system of classification of races, has not genetic sense and requires further international collaborative research to achieve a better understanding of Foc pathogenicity. Themethod of inoculum multiplication and inoculation proved to be efficient for testing cvs. reaction to the disease.

Keywords : Panama disease; Fusarium wilts of banana; Fusarium oxysporum f. sp. cubense; resistance; cultivars reaction; VCG.

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