Data/hora: 09/06/2024 04:43:44

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 13/08/1992
Data da última atualização: | 13/08/1992
Autoria: | LEE, L. W.; KNAPP, J. L.; SYVERTSEN, J. P.
Afiliação: | University of Florida, IFAS, Citrus Research and Education Center, 700 Experimental Station Road, Lake Alfred, FL 33850.
Título: | Spray oil effects on citrus.
Ano de publicação: | 1991
Fonte/Imprenta: | Proc. Fla. State Hort. Soc. v.104, p.203-206, 1991.
Idioma: | Inglês
Conteúdo: | Effects of horticultural spray oils on citrus leaves and fruit were evaluated in a series of experiments. Variables included spray applications at different times of the year of different concentrations of oils, drought stress in conjunction with oils and the unsulfonated residues (UR) of the oils. Initial results indicated no effect of oil on internal fruit quality, fruit color, fruit diameter, leaf drop, and leaf freeze tolerance from a single 2% FC-435-66 oil spray in the fall at a rate of 187 liters of oil/ha (20 gal of oil/acre). Dual sprays did increase leaf freezing point temperatures but this increase was only 0.3 C A growth chamber experiment indicated no effect from oil, drought stress on visible phytotoxicity symptoms. In a greenhouse drought stressexperiment no significant effects on leaf drop, chlorosis, and growth could be attributed to the effect of drought stress in conjunction with oils. Overall, no significant effects of oil on leaf drop or growth of container trees were found except when a 100% oil concentration was used. Results from 1991 field experiments indicated no significant differences in leaf drop or fruit quality due to spring, summer, and fall oil sprays of 2% FC-435-66 oil or a low UR oil. High concentration sprays of 50 and 100% (v/v) of FC-435-66 oil did produce significant leaf drop of both the new flush and mature leaves. There was also significant fruit drop in the spring.
Palavras-Chave: | dano foliar; Fitotoxidade foliar; hidrocarbono.
Thesagro: | Citrus Sinensis; Óleo Essencial.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)

Exemplares:

CNPMF - (2011-1) - ADC - AP - -- - 635.05 -  - 635.05 - DIS
CNPMF - (3043-1) - ADC - AP - -- - 635.05 -  - 635.05 - DIS