Composição química e atividade in vitro de três óleos essenciais sobre Colletotrichum gloeosporioides do maracujazeiro

Aquino, César Fernandes; Sales, Nilza Lima Pereira; Soares, Eriksen Patric Souza; Martins, Ernane Ronie; Costa, Cândido Alves da

doi:10.1590/1983-084x/12_115

Cited by 26 publications

(17 citation statements)

References 17 publications

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“…The authors [23] also observed similar percentages for Geranial (46.3%) and Neral (31.28%). Yet [24] found levels of 43.6% for Neral and 34% for Geranial, values that are different to the ones found on this work, where the highest percentage was of Neral. It is known that many factors, such as extraction method, access and conditions of cultivation may have an influence on the levels of the essential oil components.…”

Section: Discussioncontrasting

confidence: 99%

Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize

et al. 2017

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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.

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Section: Discussioncontrasting

confidence: 99%

Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize

et al. 2017

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“…At the center of each plate a 5-mm diameter disk was placed with mycelium of the monosporic culture grown prior for 7 days in PDA. The plates were then incubated at 25°C (AQUINO et al, 2014). Estimations were conducted through daily measurements of the colony diameters until day ten, after which, the Mycelial Growth Index (MGI) was determined, applying the equation adopted by ABREU et al (2008).…”

Section: Methodsmentioning

confidence: 99%

Essential oils in the control of dry bubble disease in white button mushroom

et al. 2017

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Lecanicillium fungicola, which causes Dry bubble disease, induces infections and inflicts major losses in champignon production. The control can be managed through measures of hygiene and use of fungicides; however, in Brazil there are no registered products. This study aimed to estimate the influence of various essential oils extracted from Melissa officinalis, Thymus vulgaris, Origanum vulgare, Eucalyptus globulus, Cinnamomum zeylanicum and Syzygium aromaticum on the in vitro development and their uses. Therefore, analysis was performed of the L. fungicola isolates in vitro and the best oils were tested in vivo. Besides, the Agaricus bisporus - L. fungicola interaction was confirmed by scanning electron microscopy (SEM). Cinnamon and clove oils in concentrations of 0.4% and thyme oil of 0.8% were identified as good growth inhibitors of the pathogenic mycelium. Effective inhibition of the conidial germination was seen in all concentrations by cinnamon oil, and by clove and thyme oils only at 0.4% and 0.8%, respectively. When the essential oils were applied post-infestation in the in vivo experiments the incidence of the disease in the mushrooms was much lower. From the SEM it was clear that 19 hours after the inoculation of A. bisporus with L. fungicola, the spores had already completely germinated, revealing the presence of the infection. Therefore, the findings of this study indicated that the oil extracts of cinnamon, clove and thyme are potential and efficient alternatives in the control of dry bubble disease.

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“…Trabalhos têm demonstrado o potencial dos óleos essenciais no controle de fungos fitopatogênicos como Alternaria solani, Penicilium digitatum, Colletotrichum musae, Corynespora cassiicola, Macrophomina phaseolina, Sclerotinia sclerotiorum, Alternaria alternata, Pseudocercospora griseola, dentre outros (Balbi-peña et al, 2006;Almeida et al, 2006;Abdolahi et al, 2010;Carlos et al, 2010;Martins et al, 2010;Hojos et al, 2012).…”

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Atividade fungitóxica in vitro dos óleos essenciais de Lippia sidoides Cham., Cymbopogon citratus(D.C.) Stapf. e de seus constituintes majoritários no controle de Rhizoctonia solani e Sclerotium rolfsii

Gonçalves

Pereira

Santos

et al. 2015

Rev. bras. plantas med.

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RESUMO O objetivo deste estudo foi avaliar o potencial fungitóxicos dos óleos essenciais de Cymbopogon citratus, Lippia sidoides, e de seus constituintes majoritários, sobre o crescimento micelial dos fitopatógenos Rhizoctonia solani e Sclerotium rolfsii. A caracterização química do óleo de L. sidoides demonstrou a presença do carvacrol (33,27%) e o 1,8-cineol (24,41%) como seus componentes majoritários. Enquanto que o citral (77,6%) foi o constituinte majoritário do óleo essencial de C. citratus. A avaliação do potencial fungitóxico dos óleos essenciais e de seus constituintes majoritários foi realizada por meio de ensaios in vitro, avaliando a inibição do crescimento micelial dos microrganismos. Ambos os óleos essenciais inibiram totalmente o crescimento micelial de R. solani na concentração de 400 µg mL-1. O crescimento micelial de S. rolfsii foi inibido pelo óleo essencial de C. citratus na concentração de 300 µg mL-1 e pelo óleo essencial de L. sidoides na concentração de 400 µg mL-1. Em relação aos constituintes majoritários, o 1,8-cineol não apresentou efeito fungitóxico nas concentrações avaliadas. No entanto, o carvacrol e o citral foram mais efetivos que os óleos essenciais havendo ausência de crescimento micelial de R. solani e de S. rolfsii nas concentrações de 200 µg mL-1 e 225 µg mL-1, respectivamente.

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Composição química e atividade in vitro de três óleos essenciais sobre Colletotrichum gloeosporioides do maracujazeiro

Cited by 26 publications

References 17 publications

Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize

Essential Oil of Cymbopogon citratus on the Control of the Curvularia Leaf Spot Disease on Maize

Essential oils in the control of dry bubble disease in white button mushroom

Atividade fungitóxica in vitro dos óleos essenciais de Lippia sidoides Cham., Cymbopogon citratus(D.C.) Stapf. e de seus constituintes majoritários no controle de Rhizoctonia solani e Sclerotium rolfsii

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