Data/hora: 18/06/2024 02:57:30

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 14/09/1993
Data da última atualização: | 14/09/1993
Autoria: | LEE, L. W.; KNAPP, J. L.
Afiliação: | University of Florida, IFAS Citrus Research and Education Center 700 Experiment Station Road Lakr Alfred, FL 33850.
Título: | Hortivultural spray oil has little effect on citrus fruit quality, leaf drop and leaf freeze hardiness.
Ano de publicação: | 1992
Fonte/Imprenta: | Florida State Horticultural Society. v.105, p.10-13, 1992.
Idioma: | Inglês
Conteúdo: | Two experiments were conducted to test effec of late season (October-December) applications of horticultural petroleum oil on leaf freeze hardiness and other indices of healthy, well-watered 20-year-old 'Hamlin' orange trees on Carrizo citrage rootstock. Two percent (v/v) FC-435-66 spray oil (27 liters of spray solution/tree or 226 liters of oil/ha) was applied by handgun on 7 Oct., 4 Nct., 20 Nov., and 5 Dec. 1991. Sprays resulted in a slight reduction of leaf freeze hardiness (LFH) of up to 0.6 degree C following the 7 Oct., 4 Nov., and 20 Nov. applications (determined on 26 Nov. 1991). There was the same LFH reduction on the 4 Nov. application or later dates (determined on 19 Dec. 1991). No effect was found on quality of fruit harvested on Nov. 18 followingaplications on 4 Nov. or earlier. No effect was found on leaf drop following the 7 Oct., 4 Nov. and 5 Dec. applications. In the second experiment, 2% (v/v) FC-435-66 oil (99% unsulfonated residue (UR) was sprayed to runoff on 9 Oct. 1991 and 19 Nov. 1991 to individual tree limbs.No differences were detected on leaf freeze hardiness on 13 Nov. 1991 or 9 Jan. 1992 nor significant differences in leaf drop.
Palavras-Chave: | Foliar phytotoxicity; Leaf damage; Narrow range oils.
Thesagro: | Citrus Sinensis.
Thesaurus Nal: | hydrocarbons.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (2215-1) - ADC - AP - -- - 635.05 -  - 635.05 - DIS