Data/hora: 25/06/2024 13:46:04

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 31/07/1992
Data da última atualização: | 31/07/1992
Autoria: | LIMA, J. E. O. de.
Título: | Navel orange fruit drop: secondary-fruit ontogeny, physiological studies, and growth regulator effects
Ano de publicação: | 1983
Fonte/Imprenta: | Florida, USA: University of Florida, 1983
Páginas: | 143 p.
Série: | Tese Doutorado
Idioma: | Inglês
Conteúdo: | Navel orange (Citrus sinensis (L.) Osbeck) fruit drop, which ocurred after the fruit set period, was studied in 2 groves in the north central citrus region of Florida from 1979 to 1982. Fruit crop per year ranged from 63 to 200 fruit per tree. Major causes of drop were secondary-fruit yellowing *SFY), stylar-end decay (SED), and fruit splitting. These causes of fruit drop were related to the unusual structure of the stylar-end of navel orange, which encloses the secondary fruit. A spray application of 20 ppm 2,4-D 5 to 9 weeks after midbloom reduced SFY, but not other causes of fruit drop in the 1980 to 1982 seasons, and increased yield in 1981 with no adverse effect on fruit quality. Other 2,4-D, gibberellic acid (GA), or 2,4-D + GA sprays at or within 19 weeks of midbloom were less effective or ineffective.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (19733-1) - ADD - TS - -- - T20/83 -  - T20/83 - DIS