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      Maturity indexes for 'Kumagai' and 'Paluma' guavas Translated title: Índices de maturidade para goiabeiras 'Kumagai' e 'Paluma'

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          Abstract

          Harvest time is one of the main factors related to guava fruit postharvest losses. It is subjectively determined by fruit size and skin color, without any consensual standardization among the growers. The use of maturity indexes enables growers to know the ideal harvest time according to each market situation. The objective of this work was to determine the maturity indexes to identify the harvest time for guava fruit cv. Kumagai and Paluma. Skin color, fruit firmness, soluble solids, titratable acidity, ratio and ascorbic acid were analyzed. The most adequate maturity indexes for 'Kumagai' guava fruit were skin color and pulp firmness, while for 'Paluma' guava fruit, the best indexes were skin color, pulp firmness, titratable acidity and ratio.

          Translated abstract

          O ponto de colheita é um dos principais fatores de perda pós-colheita e, em goiaba, este é determinado de maneira subjetiva através da coloração externa e tamanho do fruto, não havendo uma padronização consensual entre os produtores. A utilização de índices de maturação permite que se conheça o ponto de colheita ideal para cada situação mercadológica. Este trabalho objetivou determinar tais índices que permitam identificar o ponto de colheita em goiabas 'Kumagai' e 'Paluma', em cinco estádios de maturação. Avaliaram-se cor da casca, firmeza, teor de sólidos solúveis, acidez titulável, ratio e teor de ácido ascórbico. Os índices de maturação mais adequados para 'Kumagai' foram cor da casca e firmeza da polpa, e para 'Paluma', foram cor da casca, firmeza da polpa, acidez titulável e relação sólidos solúveis/acidez titulável.

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          Applied multivariate statistical analysis

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            Official methods of analisis of AOAC International

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

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbf
                Revista Brasileira de Fruticultura
                Rev. Bras. Frutic.
                Sociedade Brasileira de Fruticultura (Jaboticabal )
                1806-9967
                August 2006
                : 28
                : 2
                : 176-179
                Affiliations
                [1 ] Universidade de São Paulo Brazil
                [2 ] Universidade de São Paulo Brazil
                [3 ] Universidade de São Paulo Brazil
                [4 ] Universidade de São Paulo Brazil
                [5 ] Universidade de São Paulo Brazil
                Article
                S0100-29452006000200005
                10.1590/S0100-29452006000200005
                0860e1a2-e0f3-4153-9cfa-44fa9a020acc

                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
                postharvest,Psidium guajava,harvest maturity,firmness,pós-colheita,ponto de colheita,firmeza de polpa

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