Chitosan as an option to control mildew in the sustainable vinegrowing

Authors

  • Aline José Maia Universidade Estadual de Maringá
  • Carla Daiane Leite Universidade Estadual do Centro Oeste
  • Renato Vasconcelos Botelho Universidade Estadual do Centro Oeste
  • Cacilda Márcia Duarte Rios Faria Universidade Estadual do Centro Oeste
  • Danielle Machado Universidade Federal do Paraná

DOI:

https://doi.org/10.5433/1679-0359.2012v33n6Supl1p2519

Keywords:

Vitis vinifera, Plasmopara viticola, Disease management, Alternative control, Agroecology.

Abstract

The aim of this study was to evaluate different concentrations of chitosan on the severity of mildew and the germination of Plasmopara viticola, in addition to its effect on vegetative growth of grapevines cv. Cabernet Sauvignon and Merlot. Two experiments were conducted. In the first vine cuttings were planted in pots with Plantmax® and sand 1:1 (v:v) and maintained in a greenhouse under intermittent mist. Every seven days were sprayed with aqueous solutions of chitosan at concentrations of 0, 20, 40, 80 and 160 mg L-1. The leaves were inoculated with sporangia of P. viticola 48 hours after the second application of chitosan. The first symptoms appeared ten days after inoculation, and severity ratings were performed every two days. The concentration of 160 mg L-1 of chitosan decreased the severity of downy mildew in 70.2 % and 79.1% in cv. Merlot and Cabernet Sauvignon, respectively. Sporangial germination tests were also conducted. The highest concentration of chitosan (160 mg L-1) inhibited by 50 % germination of P. viticola after 24 hours. In the second experiment, cuttings, pre-rooted, were obtained and handled as the previous experiment. After 60 days in a greenhouse, we evaluated the following variables: mass of roots and leaves, root length and leaf area. There was no significant difference between treatments for the variables related to plant development.

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Author Biographies

Aline José Maia, Universidade Estadual de Maringá

Doutoranda do Programa de Pós-Graduação em Proteção de Plantas, Deptº de Agronomia, Universidade Estadual de Maringá, UEM, Maringá, PR.

Carla Daiane Leite, Universidade Estadual do Centro Oeste

Profª do Deptº de Agronomia da Universidade Estadual do Centro-Oeste, UNICENTRO, Guarapuava, PR.

Renato Vasconcelos Botelho, Universidade Estadual do Centro Oeste

Prof. Adjunto do Deptº de Agronomia da UNICENTRO, Setor Fruticultura. Bolsistas de Produtividade CNPq.

Cacilda Márcia Duarte Rios Faria, Universidade Estadual do Centro Oeste

Profª. Adjunto do Deptº de Agronomia da UNICENTRO, Setor Fitopatologia.

Danielle Machado, Universidade Federal do Paraná

Mestranda do Programa de Pós-Graduação em Produção de Vegetal, Deptºde Agronomia da Universidade Federal do Paraná, UFPR, Cutitiba, PR.

Published

2012-12-20

How to Cite

Maia, A. J., Leite, C. D., Botelho, R. V., Faria, C. M. D. R., & Machado, D. (2012). Chitosan as an option to control mildew in the sustainable vinegrowing. Semina: Ciências Agrárias, 33(6Supl1), 2519–2530. https://doi.org/10.5433/1679-0359.2012v33n6Supl1p2519

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