Evaluation of Different Mexican Plant Extracts to Control Anthracnose

Abstract

The fungal plant infection caused by Colletotrichum gloeosporioides known as anthracnose, affects tropical fruits thus causing low yield and poor fruit quality. The antifungal activity of ethanol and chloroform extracts of different Mexican plants jarilla (Baccharis salicifolia), tepozan (Buddleia americana), nanche (Byrsonima cordata), cinco negritos (Lantana camara), Mexican oregano (Lippia berlandieri var. Scanner), and pericon (Tagetes lucida) against C. gloeosporioides were evaluated by determining the minimum inhibitory concentration (MIC) of the ethanol and chloroform extracts. Subsequently, an antifungal assay was carried out by determining the inhibition of radial growth in PDA plates added with plant extracts. Jarilla, oregano, and pericon MIC values were 400 mg/L for ethanol extracts and 200 mg/L for chloroform extracts. Tepozan, nanche, and cinco negritos showed no antifungal effect. Concerning the inhibition of radial growth, pericon ethanol extract showed an 84% inhibition; chloroform extracts of jarilla, oregano, and pericon showed 88%, 90%, and 95% inhibition, respectively. The ethanol extracts of oregano and jarilla demonstrated to be inhibitory at the reproductive phase of C. gloeosporioides, while their chloroform extracts have a fungistatic effect.

Investigations on the Antifungal Effect of Nerol against Aspergillus flavus Causing Food Spoilage

“…In our present work, mycelium growth was recorded to change with increasing concentrations of the NEL and incubation time, and the colony diameter expanded along with the increase in the number of incubation days. The results are consistent with previous findings by Avila-Sosa et al [ 16 ]. However, the results reported in the present study indicate that the vapor phase of NEL results in higher inhibition than the contact phase to the tested fungi in vitro .…”

“…The results are consistent with previous findings by Avila-Sosa et al [16]. However, the results reported in the present study indicate that the vapor phase of NEL results in higher inhibition than the contact phase to the tested fungi in vitro .…”

In Vitro Antifungal Activity and Chemical Composition of Piper auritum Kunth Essential Oil against Fusarium oxysporum and Fusarium equiseti

“…The Petri dishes were sealed and incubated in the dark at 30 ± 2 • C. The mycelial diameter was measured every 24 h (average of two measurements diametrically opposite) for six days for FCHA-T7 and FCHJ-T6 and, seven days for FCHE-T8 until the negative control reached the edge of the plate. Three repetitions per treatment were used [31][32][33]. Radial growth inhibition was calculated as a percentage using Equation (2).…”

Antimicrobial profile of essential oils extracted from wild versus cultivated Origanum ehrenberjii against enteric bacteria

“…The significant difference in the level of expression of the four active ingredients in wild vs. cultivated O. ehrenberjii is most likely due to environmental factors. A literature search on earlier publications suggests a dearth of research investigating the effect of the environment on the level of expression of different components in essential oils of Origanum species [20,21]. One citation pointed at the effect of water stress on plant growth and Thymol and Carvacrol concentrations in the Mexican Oregano grown under controlled conditions [20,21].…”

“…A literature search on earlier publications suggests a dearth of research investigating the effect of the environment on the level of expression of different components in essential oils of Origanum species [20,21]. One citation pointed at the effect of water stress on plant growth and Thymol and Carvacrol concentrations in the Mexican Oregano grown under controlled conditions [20,21]. To our knowledge, no citations exists documenting the impact of other environmental conditions on the level of expression of the four compounds in the essential oil of O. ehrenberjii.…”