Actividad antifúngica de Cymbopogon citratus contra Colletotrichum gloeosporioides

Abstract

The objective of this research was to evaluate in vitro the inhibitory activity of essential oils from fresh leaves of Cymbopogon citratus (lemongrass) against Colletotrichum gloeosporioides in yam. The research was conducted in the department of Sucre, Colombia. The essential oils of C. citratus were collected in the municipalities of Sincelejo, La Union and Sampues, in September and October 2015. The essential oil was extract from fresh leaves using the microwave-assisted hydrodistillation. Concentrations of 5000, 8000 and 10 000 ppm of each essential oil were prepared. An absolute control, a positive control (benomyl 1 g/l) and a negative control was used. An inhibitory activity was obtained by using the direct seeding on surface of the potato-dextrose-agar method and it was expressed as percentage of inhibition rate. The chemical characterization of essential oils was performed by gas chromatography coupled to mass spectrometry. The highest percentages of antifungal index were observed in the lemongrass from Sincelejo at concentrations of 5000, 8000 and 10 000 ppm, after in La Union at 8000 and 10 000 ppm, and finally at Sampues at 10 000 ppm, with a value of 97.77%; the effect was similar to the positive control with benomyl 1 g/l. Citral was the main constituent of the essential oils extracted. The essential oils obtained from the three municipalities showed antifungal activity against C. gloeosporioides.

Avaliação Da Qualidade Bacteriológica De Sucos Detox/Verdes

“…Colletotrichum gloeosporioides onde ocorreu a inibição micelial de 97,7% de deste microrganismo em uma concentração de 10 mg.mL -1 do extrato. (CORDERO et al, 2017).…”

Effectiveness of Cymbopogon citratus Oil Encapsulated in Chitosan on Colletotrichum gloeosporioides Isolated from Capsicum annuum

“…The composition of the EO varies in relation to the genetic component of the plant, its cultivation conditions, harvest time, the harvested part of the plant, the management of the plant material, and the extraction methods, among other factors. Researchers [ 6 , 17 ], evaluated the antimicrobial effect of the individual citral and geranial components present in Cymbopogon sp on the horticultural pathogens Rhizoctonia solani ( Ceratobasidiaceae ), Fusarium oxysporum ( Nectriaceae ), and Sclerotium rolfsii ( Atheliaceae ). A variant of the poisoned food technique was used to verify the efficiency of these molecules and its selectivity according to the phytopathogen evaluation of the biocontroller.…”

“…Antifungal activity against Colletotrichum sp. ( Glomerellaceae ) has been demonstrated with the use of lemongrass EO ( Cymbopogon citratus — Poaceae ) and its major components, which produced an antifungal index value of 97.7% [ 6 ].…”

Estudo etnofarmacológico de plantas medicinais utilizadas pela população do estado do Pará, Brasil / Ethnopharmacological study of medicinal plants used by the population of the state of Pará, Brazil

“…A atividade antifúngica do capim-cidreira também é relatada na literatura recente, em um estudo onde se avaliou a atividade inibitoria in vitro de óleos essenciais de folhas frescas da espécie contra Colletotrichum gloeosporioides em inhame, foi verificado que os óleos essenciais obtidos apresentaram atividade antifúngica contra Colletitrichum gloeosporioides (PÉREZ-CORDERO, et. al.…”