efeito de preparados caseiros no controle da queima-acinzentada, na cultura da cebola alternative formulations for control of botrytis squamosa on onion

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ID: 140107
1999
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Abstract
Agricultores do Alto Vale do Itajaí (SC), vem utilizando preparados caseiros no tratamento fitossanitário da cebola, cuja principal doença, durante a fase de muda, é a queima-acinzentada, causada pelo fungo Botrytis squamosa. Neste trabalho, realizado nos anos de 1993, 94 e 95, no período de muda da cebola, durante a fase de canteiro, avaliou-se o efeito de extratos alcóolicos de Matricaria chamomilla, Mentha glacilis, alho e própolis; cinza vegetal e cal; soluções de B+Zn, KMnO4, NaClO, Sílica-gasil, creolina, formalina; calda sulfocálcica, calda bordalesa, cânfora, enxofre, enxofre+silicato+propólis e o fungo antagonista, Gliocladium roseum, sobre o desenvolvimento da queima-acinzentada. A aplicação dos produtos foi semanal e as concentrações foram ajustadas em ensaio preliminar. O estudo de eficiência mostrou que Gliocladium roseum (108 esporos/ml) igualou-se ao fungicida vinclozolin (0,075%), no controle da queima-acinzentada em 1994/95. No ciclo de 1995/96, maior sobrevivência de plantas e/ou maior número de plantas aptas ao transplante foram obtidos nos tratamentos com cinza vegetal, calda bordalesa (0,5%) e a mistura de enxofre + silicato + extrato de própolis, comparados com o tratamento padrão, com fungicida. As soluções de KMnO4, NaClO, cânfora, enxofre e sílica-gasil não mostraram diferença com a testemunha não tratada. A adubação orgânica de base, em 1995, proporcionou mudas com menor intensidade de B. squamosa e maior índice de sobrevivência das mesmas do que adubação mineral, independentemente da formulação.
Santa Catarina State farmers in the "Alto Vale do Itajaí" region are using several home-made products to control onion pests, where leaf blight of onion (Botrytis squamosa) is the main nursery disease. This research was carried out during the nursery period in 1993, 94 and 95, in order to evaluate traditional formulations against leaf blight of onion. The formulations studied were alcoholic extracts of Matricaria chamomilla, Mentha glacilis, garlic and propolis; wood ash, lime, solution of B+Zn, KMnO4, NaClO, "silica-gasil", creoline, formalin, Bordeaux mixture, sulphur, camphor, and the antagonist Gliocladium roseum. The formulations were used weekly in concentrations previously tested to avoid phytotoxicity. In the onion cycle 1994/95, G. roseum (108 spores/ml) reduced leaf blight of onion with the effect comparable to the standard fungicide vinclozolin (0.075%). In 1995/96, the survival of onion and the number of plants suitable for transplanting were highest using wood ash, Bordeaux mixture (0.5%) and a mixture of sulphur + Na2SiO4 + propolis extract, when compared to the fungicide used as a standard treatment. No leaf blight control effect was observed with sprays of KMnO4, NaClO, "camphor", sulphur and "sílica-gasil". Organic fertilizer increased the survival of onion seedlings and reduced Botrytis squamosa, irrespective of formulation, during the 1995/97 period.
Reference Key
boff1999horticulturaefeito Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Pedro Boff;Paulo A. de S. Gonçalves;João F. Debarba
Journal research on biomedical engineering
Year 1999
DOI
10.1590/S0102-05361999000200001
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05361999000200001
Keywords
biological control allium cepa gliocladium roseumplant culture

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