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      Conservação de goiabas tratadas com emulsões de cera de carnaúba Translated title: Postharvest conservation of guavas through carnauba wax emulsion applications

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          Abstract

          A goiaba é um fruto muito perecível. Assim, objetivou-se avaliar os efeitos de ceras à base de carnaúba na conservação pós-colheita de goiabas Pedro Sato sob condição ambiente. Utilizaram-se cinco ceras comerciais: Citrosol AK (18%), Citrosol M (10%), Fruit wax (18 a 21%), Meghwax ECF-100 (30%) e Cleantex wax (18,5 a 20,5%), as quais foram aplicadas manualmente, na proporção de 0,15 a 0,20mL por fruta. Frutas sem aplicação de cera foram utilizadas como controle. O delineamento experimental foi inteiramente casualizado com 6 tratamentos, 4 repetições e 5 frutas por parcela. As goiabas foram caracterizadas imediatamente após a colheita e avaliadas aos 2, 4 e 6 dias após a aplicação dos tratamentos. As ceras exerceram pouca influência nos teores de sólidos solúveis totais, acidez total titulável e ácido ascórbico, porém, foram eficientes em retardar o amadurecimento, reduzir a perda de massa e a incidência de podridões. A cera Meghwax ECF-100 apresenta potencial para utilização em goiabas, porém há necessidade de ser avaliada em maior diluição, para evitar alterações indesejáveis.

          Translated abstract

          Guavas are very perishable fruits. Therefore, the objective of the present work was to evaluate the effects of several carnauba based waxes in the postharvest life of Pedro Sato guavas under room conditions. Five commercial waxes were used: Citrosol AK (18%), Citrosol M (10%), Fruit wax (18 a 21%), Meghwax ECF-100 (30%) e Cleantex wax (18,5 a 20,5%). The waxes were applied manualy in the rate of 0.15 to 0.20mL of wax per fruit. Control fruits were not treated. The experiment was conducted in a completely randomized design with 6 treatments, 4 replicates per treatment and 5 fruits as experimental unit. Guavas were evaluated at harvest and at every 2 days until the 6th day after treatments. Waxing had little effect on total soluble solids, total titratable acidity and ascorbic acid contents. However, the waxes were efficient in delaying ripening and reducing mass loss and decay incidence. The Meghwax ECF-100 shows potential for its use in guavas, although it needs to be tested in lower concentrations to avoid ripening problems.

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          Interaction of paclobutrazol and other growth regulators in the process of rhizogenesis in Ligustrum vulgare L.

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            Fisiologia pós-colheita de frutos

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              Postharvest biotechnology of fruits

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbf
                Revista Brasileira de Fruticultura
                Rev. Bras. Frutic.
                Sociedade Brasileira de Fruticultura (Jaboticabal )
                1806-9967
                December 2003
                : 25
                : 3
                : 401-405
                Affiliations
                [1 ] Universidade de São Paulo Brazil
                [2 ] Universidade de São Paulo Brazil
                Article
                S0100-29452003000300010
                10.1590/S0100-29452003000300010
                ac7e6293-5f74-4de5-b2fa-5122d85dc8c8

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-2945&lng=en
                Categories
                HORTICULTURE

                Horticulture
                Psidium guajava,storage,modified atmosphere,armazenamento,atmosfera modificada
                Horticulture
                Psidium guajava, storage, modified atmosphere, armazenamento, atmosfera modificada

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