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 in the original language of the document
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 Brazil |
| 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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