| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
|
Data corrente: |
31/08/1995 |
|
Data da última atualização: |
31/08/1995 |
|
Autoria: |
FURNESS, G. O.; HOWARD, R. T.; SMITH. P. J. |
|
Afiliação: |
Department of Agriculture and Fisheries, Research Centre, PO Box 411, Loxton, South Australia 5333, and Chemistry Division. |
|
Título: |
Measurement of petroleum oil deposits on citrus leaves bu gas-liquid choromatography. |
|
Ano de publicação: |
1979 |
|
Fonte/Imprenta: |
Pestic. Sci., v.10, p.478-484, 1979. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Measurements are often made of the amount of oil deposited by spraying with oil emulsions, for instance, in studies of the efficacy of spraying oils to control California red scale, Aonidiella aurantii (Mskell), and the phytotoxicity of these oils to citrus trees. The quantity of oil deposited on the leaves influences both efficacy and phytotoxicity. The method most commonly used for measueing oil deposit on plant surfaces involves the addition to the oil of a dye which can subsequently be extracted from the plant material with a suitable solvent. The quantity of deposited oil can then be determined by measuring the concentration of dye in the extract spectrophotometrically. This method is indirect and the dyes used may be affected by sunlignt. Accuracy is further reduced when low concentratons (below 1 Mug of oil cm-2 of foilage) are measured, because it is difficult to measure small concentrations of dye accurately. The aim of the present study was to develop a simple, direct and accurate method of measuring oil deposits on citrus leave. The method is intended to be used in later studies on the effects of variations in the concentrations of emulsifier and oils deposited by sprays. |
|
Palavras-Chave: |
Citrus app; Cromatrografia; Cultivar valencia; Mudas. |
|
Thesagro: |
Citrus Sinensis. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01753naa a2200205 a 4500
001 1646931
005 1995-08-31
008 1979 bl --- 0-- u #d
100 1 $aFURNESS, G. O.
245 $aMeasurement of petroleum oil deposits on citrus leaves bu gas-liquid choromatography.
260 $c1979
520 $aMeasurements are often made of the amount of oil deposited by spraying with oil emulsions, for instance, in studies of the efficacy of spraying oils to control California red scale, Aonidiella aurantii (Mskell), and the phytotoxicity of these oils to citrus trees. The quantity of oil deposited on the leaves influences both efficacy and phytotoxicity. The method most commonly used for measueing oil deposit on plant surfaces involves the addition to the oil of a dye which can subsequently be extracted from the plant material with a suitable solvent. The quantity of deposited oil can then be determined by measuring the concentration of dye in the extract spectrophotometrically. This method is indirect and the dyes used may be affected by sunlignt. Accuracy is further reduced when low concentratons (below 1 Mug of oil cm-2 of foilage) are measured, because it is difficult to measure small concentrations of dye accurately. The aim of the present study was to develop a simple, direct and accurate method of measuring oil deposits on citrus leave. The method is intended to be used in later studies on the effects of variations in the concentrations of emulsifier and oils deposited by sprays.
650 $aCitrus Sinensis
653 $aCitrus app
653 $aCromatrografia
653 $aCultivar valencia
653 $aMudas
700 1 $aHOWARD, R. T.
700 1 $aSMITH. P. J.
773 $tPestic. Sci.$gv.10, p.478-484, 1979.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 140 | |
| 16. |  | MARTINEZ, M. L.; VERNEQUE, R. da S.; TEODORO, R. L.; PIMENTEL, A. A.; FERREIRA, W. J. Análise comparativa de procedimentos metodológicos para a avaliação genética de vacas para a produção de leite, Revista Brasileira de Zootecnia, Vicosa, v.28, n.3, p.495-503, l999.| Biblioteca(s): Embrapa Gado de Leite. |
|    |
| Registros recuperados : 140 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
