Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize
The Curvularia Leaf Spot is becoming more common due to the culture expansion and the low resistance of the cultivated genotypes in tropical regions. Thus, the objective was to evaluate the fungitoxicity of the essential oil of Cymbopogon citratus upon the phytopathogen Curvularia lunata, causative...
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MDPI AG
2017-08-01
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| Series: | Medicines |
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| Online Access: | https://www.mdpi.com/2305-6320/4/3/62 |
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| author | Dalmarcia de Sousa Carlos Mourão Talita Ferreira de Souza Pereira Danival José de Souza Aloísio Freitas Chagas Júnior Mateus Sunti Dalcin Ronice Alves Veloso Evelynne Urzêdo Leão Gil Rodrigues dos Santos |
| author_facet | Dalmarcia de Sousa Carlos Mourão Talita Ferreira de Souza Pereira Danival José de Souza Aloísio Freitas Chagas Júnior Mateus Sunti Dalcin Ronice Alves Veloso Evelynne Urzêdo Leão Gil Rodrigues dos Santos |
| author_sort | Dalmarcia de Sousa Carlos Mourão |
| collection | DOAJ |
| description | The Curvularia Leaf Spot is becoming more common due to the culture expansion and the low resistance of the cultivated genotypes in tropical regions. Thus, the objective was to evaluate the fungitoxicity of the essential oil of Cymbopogon citratus upon the phytopathogen Curvularia lunata, causative agent of the Curvularia Leaf Spot. There was realized pathogenicity tests of C. lunata in maize plants, phytotoxicity of the essential oil of C. citratus and gas chromatography attached, germination tests of the conidia, and of in vitro inhibition of C. lunata. Also, there were realized tests aiming at verifying the phytopathogen control in vivo. In the pathogenicity tests, there were verified symptoms of the disease in all of the suspensions tested on plants. It was observed that the essential oil concentrations of 7.5 µL mL−1 to 50 µL mL−1 were phytotoxic. The majoritarian chemical components of the essential oil of C. citratus were Geranial (41.46%) and Neral (32.43%). The concentrations of 5 and 7.5 µL mL−1 inhibited 100% of conidia germination. None of the concentrations evaluated effectively inhibited C. lunata mycelial growth in in vitro tests. In the preventive control, the concentration of 7.5 µL mL−1 was sufficient for the reduction of the progress of the disease, however the curative control was not efficient on the tested dosages. |
| first_indexed | 2024-12-21T07:59:23Z |
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| issn | 2305-6320 |
| language | English |
| last_indexed | 2024-12-21T07:59:23Z |
| publishDate | 2017-08-01 |
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| record_format | Article |
| series | Medicines |
| spelling | doaj.art-77af5bf7f9514f298341299d3ed0bb4c2022-12-21T19:10:56ZengMDPI AGMedicines2305-63202017-08-01436210.3390/medicines4030062medicines4030062Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on MaizeDalmarcia de Sousa Carlos Mourão0Talita Ferreira de Souza Pereira1Danival José de Souza2Aloísio Freitas Chagas Júnior3Mateus Sunti Dalcin4Ronice Alves Veloso5Evelynne Urzêdo Leão6Gil Rodrigues dos Santos7Federal University of Tocantins, Gurupi Campus, 77402-970 Gurupi, BrazilFederal University of Tocantins, Gurupi Campus, 77402-970 Gurupi, BrazilFederal University of Tocantins, Gurupi Campus, 77402-970 Gurupi, BrazilFederal University of Tocantins, Gurupi Campus, 77402-970 Gurupi, BrazilFederal University of Tocantins, Gurupi Campus, 77402-970 Gurupi, BrazilFederal University of Tocantins, Gurupi Campus, 77402-970 Gurupi, BrazilFederal University of Tocantins, Gurupi Campus, 77402-970 Gurupi, BrazilFederal University of Tocantins, Gurupi Campus, 77402-970 Gurupi, BrazilThe Curvularia Leaf Spot is becoming more common due to the culture expansion and the low resistance of the cultivated genotypes in tropical regions. Thus, the objective was to evaluate the fungitoxicity of the essential oil of Cymbopogon citratus upon the phytopathogen Curvularia lunata, causative agent of the Curvularia Leaf Spot. There was realized pathogenicity tests of C. lunata in maize plants, phytotoxicity of the essential oil of C. citratus and gas chromatography attached, germination tests of the conidia, and of in vitro inhibition of C. lunata. Also, there were realized tests aiming at verifying the phytopathogen control in vivo. In the pathogenicity tests, there were verified symptoms of the disease in all of the suspensions tested on plants. It was observed that the essential oil concentrations of 7.5 µL mL−1 to 50 µL mL−1 were phytotoxic. The majoritarian chemical components of the essential oil of C. citratus were Geranial (41.46%) and Neral (32.43%). The concentrations of 5 and 7.5 µL mL−1 inhibited 100% of conidia germination. None of the concentrations evaluated effectively inhibited C. lunata mycelial growth in in vitro tests. In the preventive control, the concentration of 7.5 µL mL−1 was sufficient for the reduction of the progress of the disease, however the curative control was not efficient on the tested dosages.https://www.mdpi.com/2305-6320/4/3/62botanical fungicidelemongrassZea mayspreventive controlcurative control |
| spellingShingle | Dalmarcia de Sousa Carlos Mourão Talita Ferreira de Souza Pereira Danival José de Souza Aloísio Freitas Chagas Júnior Mateus Sunti Dalcin Ronice Alves Veloso Evelynne Urzêdo Leão Gil Rodrigues dos Santos Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize Medicines botanical fungicide lemongrass Zea mays preventive control curative control |
| title | Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize |
| title_full | Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize |
| title_fullStr | Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize |
| title_full_unstemmed | Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize |
| title_short | Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize |
| title_sort | essential oil of cymbopogon citratus on the control of the curvularia leaf spot disease on maize |
| topic | botanical fungicide lemongrass Zea mays preventive control curative control |
| url | https://www.mdpi.com/2305-6320/4/3/62 |
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