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Revista Brasileira de Fruticultura

Print version ISSN 0100-2945

Abstract

PINHO, Danilo Batista et al. Evaluation of genotypes of banana to Colletotrichum musae in postharvest. Rev. Bras. Frutic. [online]. 2010, vol.32, n.3, pp. 786-790.  Epub Aug 20, 2010. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452010005000078.

Some tetraploides hybrids present resistance to anthracnose, however the information on the levels of resistance of these genotypes and the behavior in Brazil are reduced. The aim of this study was to evaluate the incidence and severity of injury on the behavior of different banana genotypes resistant to Black Sigatoka for different concentrations of conidia of Colletotrichum musae in different times of evaluation. The fruits of the genotypes, Thap Maeo, Caipira, Pacovan Ken, Ambrosia, PV 42-53, PA 42-44, FHIA 01, FHIA 18 and cultivar Prata Anã, were collected at the stage of physiological maturation. Bunches containing three fruits were atomized with different concentrations: 0, 102, 103, 104, 105 and 106 conidia/mL of C. musae. The fruits were incubated at 25 ºC. The incidence and severity of the anthracnose were evaluated 3, 6, 9 and 12 days after the inoculation. A completely randomized experimental design was used, in a factorial scheme 9x6x4 (genotypes, concentrations of spores and evaluation periods) with four replications containing four bunches of three fruits. After twelve days of evaluation all the fruits of all the studied genotypes presented incidence of C. musae when different concentrations of inoculum were used. Concerning the severity of the anthracnose, the cultivar Thap Maeo had the lowest severity (27,5%) of anthracnose while the genotypes Ambrosia, PV 42-53, FHIA 18 and FHIA 01 were the most susceptible to the anthracnose at 64%, 64%, 61,33%, 58% of severity, respectively.

Keywords : Musa; Cultivar; Anthracnose; Postharvest Diseases.

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