Ação de fungicidas no controle da queima das folhas e nas características físico-química da cenoura cv. Nantes

• Autor(a) principal: Maringoni, Antonio Carlos [UNESP]
• Data de Publicação: 2012
• Outros Autores: Baldini, Luiz Felipe Guedes [UNESP], Demant, Luis Alfredo Rauer [UNESP], Evangelista, Regina Marta [UNESP], Fugita, Erika [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.deag.ufcg.edu.br/rbpa/rev142.html; http://hdl.handle.net/11449/141193
• topic: Daucus carota; Alternaria dauci; Fungicide; Post-harvest; Daucus carota; Alternaria dauci; Fungicida; Pós-colheita

The objective of present study is to evaluate the action of the fungicides mancozeb (Dithane NT – 3 Kg/ha), metiram (Polyram DF – 3 Kg/ha), azoxistrobin (Amistar WG – 100 g/ha), metiram + pyraclostrobin (CabrioTop – 2 Kg/ha) and pyraclostrobin (Comet – 400 mL/ha) in the control of leaf blight (Alternaria dauci), as well as their effects on some agronomical and physicalchemical parameters of the carrot cultivar Nantes. The plants were sprayed every seven days, starting 40 days after planting, and totaling five sprayings during their growing cycles. The severity of the disease was evaluated 45, 52, 59, 66, and 73 days after planting in order to determine the agronomical parameters (length, average diameter, and weight) and the physicalchemical characteristics (firmness, titratable acidity, soluble solids, sucrose and reduced sugars) of the roots. Applications of metiram + pyraclostrobin and pyraclostrobin, and this was found to be most effective in controlling the disease and on heavier carrot roots to pyraclostrobin. An increase in the level of soluble solids in the roots was observed with treatments of azoxistrobin, metiram + pyraclostrobin and pyraclostrobin. No effects were observed on the length, mean diameter, firmness, titratable acidity, and levels of sucrose and reduced sugars in the roots as a result of fungicide applications.