Journal of
Medicinal Plants Research

  • Abbreviation: J. Med. Plants Res.
  • Language: English
  • ISSN: 1996-0875
  • DOI: 10.5897/JMPR
  • Start Year: 2007
  • Published Articles: 3672

Full Length Research Paper

Evaluation of essential oils for preventive or curative management of melon gummy stem blight and plant toxicity

Mateus Sunti Dalcin
  • Mateus Sunti Dalcin
  • Federal University of Tocantins, Gurupi Campus, 77402-970 Gurupi,TO, Brazil.
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Adalberto Corrêa Café-Filho
  • Adalberto Corrêa Café-Filho
  • Plant Pathology Department, Campus Universitário Darcy Ribeiro, University of Brasília, 70910-900 Brasília, DF, Brazil.
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Renato de Almeida Sarmento
  • Renato de Almeida Sarmento
  • Federal University of Tocantins, Gurupi Campus, 77402-970 Gurupi,TO, Brazil.
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Ildon Rodrigues do Nascimento
  • Ildon Rodrigues do Nascimento
  • Federal University of Tocantins, Gurupi Campus, 77402-970 Gurupi,TO, Brazil.
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Talita Pereira de Souza Ferreira
  • Talita Pereira de Souza Ferreira
  • Federal University of Tocantins, Gurupi Campus, 77402-970 Gurupi,TO, Brazil.
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Raimundo Wagner de Sousa Aguiar
  • Raimundo Wagner de Sousa Aguiar
  • Federal University of Tocantins, Gurupi Campus, 77402-970 Gurupi,TO, Brazil.
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Gil Rodrigues dos Santos
  • Gil Rodrigues dos Santos
  • Federal University of Tocantins, Gurupi Campus, 77402-970 Gurupi,TO, Brazil.
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  •  Received: 26 April 2017
  •  Accepted: 28 June 2017
  •  Published: 10 July 2017

Abstract

Melon cultivation is frequently heavily reliant on synthetic fungicides, including products used to control gummy stem blight caused by Stagonosporopsis cucurbitacearum. The essential oils used in controlling plant pathogens may offer an alternative to chemical pesticides. This study evaluated the effectiveness of essential oils to control the gummy stem blight in melon plants. In vitro tests were carried out using essential oils obtained from ripe noni fruit (Morinda citrifolia) and dehydrated leaves of the following plants: lemon grass (Cymbopogon citratus), citronella grass (Cymbopogon nardus), basil (Ocimum basilicum) and Mexican tea (Chenopodium ambrosioides) at different concentrations. A synthetic fungicide was used as control treatment. Results showed that the essential oils from noni and lemongrass had the highest effect on mycelial growth inhibition in S. cucurbitacearum. When applied on melon plants as a preventive measure, the essential oils from noni and lemongrass controlled gummy stem blight at the following concentrations: 0.03, 0.05, 0.1 and 0.3%. These results highlight the potential of essential oils to manage melon fungal diseases, which may result in reduction of pesticide application.

Key words: Cucumis melo, Stagonosporopsis cucurbitacearum. Didymella bryoniae, alternative control, plant disease.