NOTA
Diagnose do "azul" - da - bananeira, no litoral sul paulista1 1 Trabalho parcialmente apresentado na XX Reunião Anual da Sociedade Brasileira para o Progresso da Ciência, realizada em São Paulo, de 7 a 13 de julho de 1968.
Occurrence of banana plant "blue" in the south coastal region of the State of São Paulo
Raul S. Moreira; Rúter Hiroce2 2 Com bolsa de suplementação do C.N.Pq.
SUMMARY
An abnormal condition characterized by general chlorosis of the leaves and the appearance of purple-brown spots on the external part of the petioles was observed during the vegetative phase of banana plants (Musa acuminata Simmonds, cultivars Nanicão), growing on a aluvial-coluvial soil at Southern Coast of the State of Sao Paulo Root system was also poorly developed in such plants. Fruits usually did not ripe well and were tasteless. No pathological agent was associated with the problem.
The purple-brown spots on petiole resemble those reported at Guinea, where it was called "bleu" and considered as a consequence of magnesium deficiency.
Inside the above mentioned Brazilian banana plant growing area, soil and leaf analysis also indicated magnesium content below the normal, and application of dolomitic lime powder gave positive effects on production and resulted in the disappearance of the "bleu" symptoms.
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Recebido para publicação em 24 de maio de 1977.
Datas de Publicação
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Publicação nesta coleção
21 Dez 2007 -
Data do Fascículo
1978
