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Quitosana no controle de Penicillium sp na pós-colheita de maçãs.

Botelho, Renato Vasconcelos; Maia, Aline José; Rickli, Edinei Hartmann; Leite, Carla Daiane and Faria, Cacilda Márcia Duarte Rios (2010) Quitosana no controle de Penicillium sp na pós-colheita de maçãs. [Chitosan for control of Penicillium sp in post-harvest of apples.] Revista Brasileira de Agroecologia, 5 (2), pp. 200-206.

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Document available online at: http://www.aba-agroecologia.org.br/revistas/index.php/rbagroecologia/article/view/9776


Summary

Este trabalho teve o objetivo de avaliar o potencial da quitosana no controle de podridões póscolheita em maçãs Um experimento in vitro avaliou o efeito das concentrações de 0, 10, 20, 40, 80 e 160 mg L-1 de quitosana (Fishfertil®, 20 g L-1 de quitosana) no crescimento micelial do fungo Penicillium sp.. Em outro ensaio, maçãs das cultivares Princesa e Castel Gala foram mergulhadas em soluções contendo as concentrações de 0, 10, 20, 40, 80 e 160 mg L-1 de quitosana e inoculados após 24 horas com um isolado de Peniccilium sp. Avaliações de incidência e severidade da doença foram realizadas aos 2, 4 e 6 dias após inoculação. No experimento in vitro, a quitosana apresentou efeito fungistático, reduzindo linearmente o diâmetro das colônias de Penicillium sp. Os tratamentos pós-colheita com quitosana reduziram a incidência de podridões em maçãs a partir da concentração de 10 mg L-1. No entanto, não houve efeito dos tratamentos no diâmetro das lesões.


Summary translation

This research aimed to evaluate the potential of chitosan on the control of post-harvest decays in apples. A trial in vitro evaluated the effects of the followed concentrations of chitosan: 0, 10, 20, 40, 80 e 160 mg L-1 (Fishfertil®, 20 g L-1 of chitosan) on the mycelial growth of a fungus isolate of Penicillium sp.. In another experiment, apples of the cultivars Princesa and Castel Gala were dipped by 10 seconds in solutions containing the following concentrations of chitosan: 10, 20, 40, 80 e 160 mg L-1; and inoculated 24 hours later with the Peniccilium sp. isolate. Evaluations of incidence and severity of the disease were carried out at 2, 4 or 6 days after inoculation. In the in vitro trial, chitosan showed a fungistatic effect, linearly decreasing the diameter of Penicillium colonies. The post-harvest treatments with chitosan decreased the incidence of apple decays starting at the concentration of 10 mg L-1. Nevertheless, there was not effect of the treatments on the lesion diameters.

EPrint Type:Journal paper
Keywords:Podridões, Incidência, Severidade, Produção orgânica. Diseases, Inicidence, Severity, Agroecology.
Agrovoc keywords:
Language
Value
URI
English
Disease control
http://aims.fao.org/aos/agrovoc/c_2327
English
agroecology
http://aims.fao.org/aos/agrovoc/c_92381
English
postharvest decay
http://aims.fao.org/aos/agrovoc/c_36841
English
Apples
http://aims.fao.org/aos/agrovoc/c_541
English
Penicillium
http://aims.fao.org/aos/agrovoc/c_5671
Subjects: Crop husbandry > Production systems > Fruit and berries
Farming Systems > Farm nutrient management
Research affiliation: Brazil > Other organizations
ISSN:1980-9735
Related Links:http://www.aba-agroecologia.org.br/revistas/index.php/rbagroecologia
Deposited By: Pinto, Gabriela Franco
ID Code:24976
Deposited On:18 Feb 2014 12:36
Last Modified:18 Feb 2014 12:36
Document Language:Portuguese/Portugues
Status:Published
Refereed:Peer-reviewed and accepted

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