African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6863

Full Length Research Paper

Efficient control of conidium germination, mycelial growth and early blight in tomato in vitro with essential oils under farm conditions

C. L. M. Abreu
  • C. L. M. Abreu
  • Empresa Mato-grossense de Pesquisa, Assistência e Extensão Rural do Mato Grosso - EMPAER-MT, Rua 02, s/n, Edifício Ceres, 3Ëš andar, CPA, 78.050-250, Cuiabá – Mato Grosso, Brazil.
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C. I. M. A. Feres
  • C. I. M. A. Feres
  • Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, Depto. de Produção Vegetal, Fazenda Experimental Lageado, Rua Josá Barbosa de Barros, 1780, C. Postal 237, 18610-307, Botucatu – São Paulo, Brazil.
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E. L. Furtado
  • E. L. Furtado
  • Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, Depto. de Produção Vegetal, Fazenda Experimental Lageado, Rua Josá Barbosa de Barros, 1780, C. Postal 237, 18610-307, Botucatu – São Paulo, Brazil.
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L. C. Ming
  • L. C. Ming
  • Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, Depto. de Produção Vegetal, Fazenda Experimental Lageado, Rua Josá Barbosa de Barros, 1780, C. Postal 237, 18610-307, Botucatu – São Paulo, Brazil.
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M. O. M. Marques
  • M. O. M. Marques
  • Instituto Agronômico, Centro de Pesquisa e Desenvolvimento de Recursos Genéticos Vegetais, Seção de Fitoquímica, C. Postal 28, 13001-970, Campinas - São Paulo, Brazil.
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R. S. Acaciod
  • R. S. Acaciod
  • Empresa  Brasileira de Pesquisa  Agropecuaria  (Embrapa)- Tabuleiros Costeiros - UEP Rio Largo/AL, BR - 104 Norte, km 85, s/n - Zona Rural - Rio Largo/AL CECA - UFAL (Centro de Ciências Agrárias da UFAL) - Campus Delza Gitaí, Cep: 57.100-000, Brazil.
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A. Riffel
  • A. Riffel
  • Empresa  Brasileira de Pesquisa  Agropecuaria  (Embrapa)- Tabuleiros Costeiros - UEP Rio Largo/AL, BR - 104 Norte, km 85, s/n - Zona Rural - Rio Largo/AL CECA - UFAL (Centro de Ciências Agrárias da UFAL) - Campus Delza Gitaí, Cep: 57.100-000, Brazil.
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H. F. Goulart
  • H. F. Goulart
  • Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, 57092-970 Maceió, Alagoas, Brasil.
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A. E. G. Santana
  • A. E. G. Santana
  • Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, 57092-970 Maceió, Alagoas, Brasil.
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F. S. Bernardes
  • F. S. Bernardes
  • Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, 57092-970 Maceió, Alagoas, Brasil.
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F. L. A. Camara
  • F. L. A. Camara
  • Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, Depto. de Produção Vegetal, Fazenda Experimental Lageado, Rua Josá Barbosa de Barros, 1780, C. Postal 237, 18610-307, Botucatu – São Paulo, Brazil.
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  •  Received: 06 May 2016
  •  Accepted: 15 September 2016
  •  Published: 27 October 2016

Abstract

The aim of this work was to find a natural product and efficient dose to control early blight in tomato crop in agro-ecological or conventional agriculture system. The treatments were essential oils from Cymbopogon citratus, Eucalyptus citriodora, Piper hispidinervum, Cymbopogon martini, Rosmarinus officinalis, Syzygium aromaticum, Cinnamomum zeylanicum, Mentha piperita, Citrus sinensis var. dulcis, and Melaleuca alternifolia used against Alternaria solani in Solanum lycopersicum under greenhouse conditions. In vitro, mycelial growth and conidia germination were completely inhibited by C. zeylanicum, C. martini, C. citratus, and S. aromaticum oils of 750 μL L-1, E. citriodora and M. alternifolia at 2000 μL L-1, and Mentha piperita in 5000 μL L-1. In tomato, plants under greenhouse conditions, early blight in leaf was inhibited by C. zeylanicum, C. martini, C. citratus, and S. aromaticum at 750 μL L-1, and E. citriodora oil of 5000 μL L-1. The best results for MIC 50 and 90 with minor dose to control was essential oil from C. citratus at 341.32 and 1.822.10 µL L-1 rich in geranial (46.91%), neral (34.34%), and geranyl acetate (6.30%). Therefore, it is possible to use this essential oils or manufacture a new and efficient product to control Alternaria solani in tomato plants.
 
Key words: Agroecology, Alternaria solani, Cimbopogon sp., Eucalyptus sp., Neral, Solanum lychopersicon.
 

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