Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/32665
Título: Phosphites for the control of anthracnose in common bean
Título(s) alternativo(s): Fosfitos para o controle da antracnose em feijoeiro comum
Palavras-chave: Colletotrichum limdemuthianum
Phaseolus vulgaris
Alternative control
Enzymatic activity
Phenolic compounds
Controle alternativo
Atividade enzimática
Compostos fenólicos
Data do documento: Jan-2017
Editor: Embrapa Secretaria de Pesquisa e Desenvolvimento Pesquisa Agropecuária Brasileira
Citação: GADAGA, S. J. C. et al. Phosphites for the control of anthracnose in common bean. Pesquisa Agropecuária Brasileira, Brasília, v. 52, n. 1, p. 36-44, jan. 2017.
Resumo: The objective of this work was to evaluate the effect of phosphites in the protection of common bean (Phaseolus vulgaris) against anthracnose. Different phosphite formulations were evaluated by quantifying peroxidase and polyphenol oxidase activity, total phenols, and lignin content. The treatments consisted of sprayings, in the V4, R5, and R7 stages, with: the K, Zn, Mn, K+Mn, K+salicyclic acid, and Cu phosphites; salicylic acid; acibenzolar-S-methyl; the fungicide azoxystrobin; besides a control, without sprayings. The area under the disease progress curve was lower in plants that received applications of the K and Mn phosphites, whose values ranged between 74 and 81%, compared with the control. The K, Zn, and K+salicyilic acid phosphites were effective in controlling the disease. In addition, disease severity was lower with the application of the K, Zn, and Mn phosphites than with the control. Enzyme (peroxidases and polyphenol oxidases) activity and levels of soluble phenols were higher in common bean plants treated with the K and Mn phosphites, although no change was detected in the levels of soluble lignin in the same tissue. Phosphite application reduces the severity of the disease, can enhance enzymatic activity, and is an effective alternative for the control of anthracnose in common bean.
URI: http://repositorio.ufla.br/jspui/handle/1/32665
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