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Utilização de redes de ensombramento para monda de bagos em uva de mesa

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Resumo:The major difficulty in the production of seedless table grapes is the excessive fruit-set and the reduced berry size, decreasing the quality of production. Different types of berry and flower thinning, with GA3 application with different doses and shading were studied. 100% of light intensity reduction, during flowering led to a almost complete berry drop in ‘Thompson Seedless’. When 95% of shading was imposed beginning at 50% and 100% bloom, the final number of berries was reduced in 62% and 70%, respectively, leading to a less compact bunch. The decrease of light intensity, led to a reduction of 48% in the final number of berries per bunch in ‘Crimson Seedless’. The GA3 treatments in ‘Thompson’, reduced the final number of berries at harvest, except when GA3 was applied only to bunches. In ‘Crimson’ the treatment four times de commercial dose, GA3[4x], resulted in a reduction of 29% of berries at harvest. GA3 applied to bunches of ‘Thompson’ produced berries with more elongated shapes and heavier berries, compared with GA3 application to the leaves. 'Thompson' proved to be more sensitive to shade and less to GA3 applications, than 'Crimson'.
Autores principais:Nóbrega, Hugo Paulo Vale
Assunto:berry set flower and berry thinning gibberelic acid seedless table grape shading
Ano:2013
País:Portugal
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso aberto
Instituição associada:Universidade de Lisboa
Idioma:português
Origem:Repositório da Universidade de Lisboa

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