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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria Tropical. |
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Data corrente: |
19/09/1993 |
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Data da última atualização: |
19/09/1993 |
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Autoria: |
MALAVOLTA, E.; PRATES, N. S. |
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Título: |
Alteracoes na composicao mineral das folhas de pomares citricos afetados pela anomalia "amarelinho" ou clorose variegada. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Laranja, Cordeiropolis, v.12, n.2, p.315-329, 1991. |
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Idioma: |
Português |
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Conteúdo: |
The abnormality was first observed in groves in the North-West of the State of Sao Paulo, Brazil in 1987. Today cerca 2.0 percent of the citrus population seems to be affected. Chief characteristics are the following: only sweet orange, independent of the rootstock; fruits are yellow, smooth and much smaller; leaves show mottling, brownish spots between the veins in both surfaces, and sometimes zinc deficiency. Leaf analyses commonly reveal low levels of K which causes variation in the balance of K, Ca and Mg. It has been observed in one case a partial regression in the symptoms which was associated with changes in the levels of K, Ca and Mg which became very close to those found in the leaves of healthy trees. Until now, however, available information does not allow to conclude whether a nutritional desorder is cause or consequence of the abnormality. For this reason further studies are necessary: monitoring of symptoms, leaf composition and presence of bacteria and other parogens if any; soil analysis; liming and fertilizer experiments designed either to induce or to correct the abnormality. |
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Palavras-Chave: |
Citros - anomalia; Citros - clorose variegada; Citros - doenca - amarelinho; Citros - folhas - composicao mineral - alteracoes; Pomares citricos - doenca. |
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Categoria do assunto: |
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Marc: |
LEADER 01766naa a2200193 a 4500
001 1417821
005 1993-09-19
008 1991 bl --- 0-- u #d
100 1 $aMALAVOLTA, E.
245 $aAlteracoes na composicao mineral das folhas de pomares citricos afetados pela anomalia "amarelinho" ou clorose variegada.
260 $c1991
520 $aThe abnormality was first observed in groves in the North-West of the State of Sao Paulo, Brazil in 1987. Today cerca 2.0 percent of the citrus population seems to be affected. Chief characteristics are the following: only sweet orange, independent of the rootstock; fruits are yellow, smooth and much smaller; leaves show mottling, brownish spots between the veins in both surfaces, and sometimes zinc deficiency. Leaf analyses commonly reveal low levels of K which causes variation in the balance of K, Ca and Mg. It has been observed in one case a partial regression in the symptoms which was associated with changes in the levels of K, Ca and Mg which became very close to those found in the leaves of healthy trees. Until now, however, available information does not allow to conclude whether a nutritional desorder is cause or consequence of the abnormality. For this reason further studies are necessary: monitoring of symptoms, leaf composition and presence of bacteria and other parogens if any; soil analysis; liming and fertilizer experiments designed either to induce or to correct the abnormality.
653 $aCitros - anomalia
653 $aCitros - clorose variegada
653 $aCitros - doenca - amarelinho
653 $aCitros - folhas - composicao mineral - alteracoes
653 $aPomares citricos - doenca
700 1 $aPRATES, N. S.
773 $tLaranja, Cordeiropolis$gv.12, n.2, p.315-329, 1991.
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Registro original: |
Embrapa Agroindústria Tropical (CNPAT) |
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