Desenvolvimento das bananeiras Prata Anã e FHIA 01 sob efeito do paclobutrazol aplicado no solo e nas folhas

• Ano de defesa: 2007
• Autor(a) principal: Souza, Emanuel Fernando Maia de
• Orientador(a): Siqueira, Dalmo Lopes de
• Banca de defesa: Silva, Fabyano Fonseca e , Motoike, Sérgio Yoshimitsu
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Banana; Regulador de crescimento; Giberelinas; Musa spp.; Paclobutrazol
• Palavras-chave em Inglês: Banana; Growth regulador; Giberelins; Musa spp.; Paclobutrazol
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
• Link de acesso: http://locus.ufv.br/handle/123456789/4642

Two experiments, one in the field and the other in a greenhouse, were carried out to evaluate the effect of paclobutrazol (PBZ) application on the growth of banana plants in Viçosa-MG. Both experiments were arranged in a 2 x 5 factorial scheme, with the cultivars Prata Anã and FHIA 01 combined with the following PBZ doses : 0 (control); 0.5; 1.0; 1.5 and 2.0 g of a.i. of PBZ plant-1. Soil application of PBZ was performed in the field experiment and compared to foliar application in the greenhouse experiment. No significant dose x cultivar interaction effect was observed for any of the variables evaluated. The cultivars studied showed a differentiated behavior according to the environment and mode of application for the characteristics pseudostem circumference, foliar area of the new leaves emitted after PBZ application, number of leaves, number of new leaves and pseudostem height. In both experiments, PBZ did not influence the number of days from planting to flowering and the total foliar area of both cultivars. Increased soil application doses increased the number of new leaves up to 1.5 g of a.i. plant-1, with a strong drop in new leaf production at 2.0 g of a.i. plant-1. However, in foliar application, the number of new leaves decreased continually with increasing PBZ doses. Foliar application of PBZ showed differences in the number of active leaves and pseudostem circumference between PBZ doses and the control. Regardless of mode of application, increased PBZ doses led to shorter pseudostem growth, on average, a height reduction of 25%. Considering sucker production, the recommended range is between 0.5 and 1.5 g of a.i. plant1 with lower values to be used under greenhouse conditions. The magnitude of PBZ effect under both modes of application was dependent on the height of the plants at the time of application, being more evident when the plants presented shorter height.