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Agronomía Costarricense

versão impressa ISSN 0377-9424


GUILLERMO RAMIREZ, Joaquín; BENJAMID JARABA, Abraham  e  BURITICA, Pablo Elias. Watery rot of pseudo-stem (Dickeya sp.) management in banana (Musa sp.) under greenhouse conditions. Agron. Costarricense [online]. 2014, vol.38, n.2, pp.83-92. ISSN 0377-9424.

This crop has serious constraints with diseases, including those caused by bacteria, such as Dickeya sp. This research aimed to evaluate the effect of 4 resistance inductors and 3 doses in Chlorine Dioxide in handling watery rot of pseudo-stem (Dickeya sp.) in banana. Resistance inducers and their doses were Potassium Phosphite: 1.5 cm3.l-1; 3-Aminobutanoic Acid: 1.0 g.l-1; Methyl Jasmonate: 0.2 g.l-1; S-Methyl-Acibenzolar: 0.3 ml.l-1, all by foliar application, while Chlorine Dioxide was injected into the pseudo-stem, in doses of 10, 20 and 30 mg.l-1. The evaluated variables were: development of the disease, total biomass and quantification of the bacterium in the inoculated pseudo-stems. Applications of Chlorine Dioxide achieved a reduction of disease by 65.4, 91.99 and 61.5%, in addition to an inhibition of 100% of the pathogen, using 30 and 50 mg.l-1 doses. Meanwhile, the use of resistance inductors reduced up to 60.6% of the disease, but this effect failed to improve plant growth.

Palavras-chave : Resistance inductors; Chlorine Dioxide; plant growth.

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