1. Phosphites for the control of anthracnose in common bean
- Author
-
Mario Sobral de Abreu, Mário Lúcio Vilela de Resende, Pedro Martins Ribeiro Júnior, Stélio Jorge Castro Gadaga, STÉLIO JORGE CASTRO GADAGA, Universidade Federal de Lavras, MÁRIO SOBRAL DE ABREU, Universidade Federal de Lavras, MÁRIO LÚCIO VILELA DE RESENDE, Universidade Federal de Lavras, and PEDRO MARTINS RIBEIRO JUNIOR, CPATSA.
- Subjects
0106 biological sciences ,Atividade Enzimática ,Compostos fenólicos ,Agriculture (General) ,enzymatic activity ,Deonça ,Colletotrichum limdemuthianum ,phenolic compounds ,Enzymatic activity ,01 natural sciences ,Antracnose ,Phaseolus vulgaris ,Phenolic compounds ,S1-972 ,chemistry.chemical_compound ,Lignin ,Phenols ,Catechol oxidase ,Phaseolus Vulgaris ,biology ,food and beverages ,04 agricultural and veterinary sciences ,alternative control ,biology.organism_classification ,Fungicide ,Horticulture ,chemistry ,Biochemistry ,Azoxystrobin ,Polyphenol ,040103 agronomy & agriculture ,biology.protein ,0401 agriculture, forestry, and fisheries ,Animal Science and Zoology ,Phaseolus ,Controle alternativo ,Alternative control ,Agronomy and Crop Science ,Salicylic acid ,Feijão ,010606 plant biology & botany - Abstract
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.
- Published
- 2017