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      Effects of ethephon and urea on ripening of fruits and leaf abscission of coffee (Coffea arábica L.) Translated title: Efeitos de ethephon e uréia na maturação de frutos e abscisão foliar do cafeeiro (Coffea arábica L.)

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          Abstract

          A field experiment was carried out to investigate the effects of ethephon and urea on ripening of fruits and leaf abscission of coffee plant. Ethephon (2-chloroethane phosphonic acid) sprays were applied to green Coffea arábica berries 26 days before counting date in concentrations of 0.5 and 0.25 ml/1 from Ethrel (240 a.i./l). The chemical accelerated the onset of fruit ripening at both concentrations. The efficacy of ethephon was increased adding urea. Ethephon 0.5 ml/1 promoted abscission of leaves and low concentration reduced shedding of leaves. The treatments did not affect the growth and production on the next harvest.

          Translated abstract

          Como o ethephon pode melhorar a uniformidade na maturação dos frutos e uréia pode aumentar a eficácia do regulador vegetal, estes compostos foram utilizados no estudo da maturação e abscisão foliar em cafeeiro. E-thephon (ácido 2-cloroetilfosfônico) foi pulverizado em Coffea arábica cv. CatuaT Vermelho com frutos verdes, nas dosagens de 0,5 e 0,25 ml/l de Ethrel (240g i.a./l). 0 regulador vegetal acelerou a maturação dos frutos em ambas dosagens e adicionando-se uréia 2%, conforme determinações realizadas 26 dias após os tratamentos. A eficiência do ethephon foi incrementada com adição de uréia. Ethephon 0,5 ml/l provocou absci são foi iar, sendo que a dosagem de 0,25 ml/1 reduziu a queda das folhas do cafeeiro. Os tratamentos não afetaram o desenvolvimento dos ramos e a frutificação na safra seguinte.

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          Ethrel: a potential coffee ripener

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            Effect of pre-harvest sprays of ethrel (2-chloroethane phosphonic acid) on Robusta coffee (Coffea canephora Pierre) berries

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              Role of RNA and protein synthesis in abscission

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                Author and article information

                Journal
                aesalq
                Anais da Escola Superior de Agricultura Luiz de Queiroz
                An. Esc. Super. Agric. Luiz de Queiroz
                Universidade de São Paulo; Escola Superior de Agricultura (Piracicaba, SP, Brazil )
                0071-1276
                2316-8935
                1981
                : 38
                : 1
                : 281-288
                Affiliations
                [02] orgnameUnion Carbide do Brasil
                [04] orgnameUSP orgdiv1E.S.A. Luiz de Queiroz orgdiv2Departamento de Matemática e Estatística
                [03] orgnameUSP orgdiv1E.S.A Luiz de Queiroz orgdiv2Departamento de Agricultura e Horticultura
                [01] orgnameE.S.A. Luiz de Queiroz orgdiv1Departamento de Botânica
                Article
                S0071-12761981000100022 S0071-1276(81)03800122
                10.1590/S0071-12761981000100022
                63f88ab2-7862-4596-8b5d-bc871340ba87

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 09 July 1981
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 10, Pages: 8
                Product

                SciELO Brazil


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