Ocimum gratissimum essential oil and modified montmorillonite clay, a means of controlling insect pests in stored products

Nguemtchouin, Marie G.M.; Ngassoum, Martin Benoît; Chalier, Pascale; Kamga, R.; Ngamo, Léonard S.T.; Cretin, Marc

doi:10.1016/j.jspr.2012.09.006

Cited by 61 publications

(31 citation statements)

References 21 publications

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“…MMT can be used for encapsulation or sorption but is usually used for polar compounds due to its hydrophilic nature; for nonpolar compounds, organomodified clays are used . Our results demonstrate that non‐modified MMT can be used to encapsulate low‐molecular‐weight nonpolar volatile compounds, consistent with previous reports of encapsulation of Ocimum gratissimum essential oil in both natural and modified MMT clays as well as polymer‐MMT mixtures . However, in these previous studies, encapsulation was achieved by solvent‐based adsorption in organic solvents or water with the addition of surfactants.…”

Section: Discussionsupporting

confidence: 91%

The efficacy of essential oil components loaded into montmorillonite against Aspergillus niger and Staphylococcus aureus

Bernardos

Božík

Álvarez

et al. 2019

Flavour & Fragrance J

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Essential oil components (EOCs) are potent natural antimicrobial agents, but their high volatility and reactivity limit their potential applications. Here, we report the preparation of a series of nanomaterials containing EOCs (i.e., allyl isothiocyanate, carvacrol, cinnamaldehyde, diallyl disulphide, eugenol and thymol). The materials were prepared by simple adsorption of the EOCs onto a montmorillonite nanoclay. The antimicrobial activities of these materials were assessed against Aspergillus niger and Staphylococcus aureus as typical models of agricultural fungal pathogens and foodborne bacterial pathogens, respectively. In addition, the activities of the encapsulated EOCs were compared with those of the corresponding free forms with or without Tween‐80 in two types of assays: microdilution assays for determining the minimum inhibitory concentration (MIC) and agar‐based assays mimicking surface treatment. Enhanced antifungal activity of the encapsulated form was observed for all EOCs. In addition, against S. aureus, the MICs of all EOCs were remarkably lower in encapsulated form than in free form. These results indicate that EOCs encapsulated in low‐cost nanoclays have favourable potential as antimicrobials compared with the pure compounds.

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Section: Discussionsupporting

confidence: 91%

The efficacy of essential oil components loaded into montmorillonite against Aspergillus niger and Staphylococcus aureus

Bernardos

Božík

Álvarez

et al. 2019

Flavour & Fragrance J

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“…More recently, montmorillonite and kaolinite as efficient materials for the adsorption of terpenic compounds and the use of loaded clays as new natural insecticides have been proposed (Tapondjou et al, 2002;Nguemtchouin et al, 2009Nguemtchouin et al, , 2010. In addition, regarding the adsorption of insecticidal formulations based on Ocimum gratissimum essential oil onto montmorillonite, a treatment with organic cations or metallic polycations significantly improve the adsorption capacity (Keita et al, 2001;Nguemtchouin et al, 2013). Another efficient method to modify clay surfaces is the cationic exchange with alkylammonium.…”

Section: Introductionmentioning

confidence: 99%

“…Another efficient method to modify clay surfaces is the cationic exchange with alkylammonium. This modification not only increases the interlayer space but also creates a better organophilic environment for hydrophobic compounds such as terpenes (Nguemtchouin et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Characterization of inorganic and organic clay modified materials: An approach for adsorption of an insecticidal terpenic compound

Mbouga

Ngassoum

Kamga

et al. 2015

Applied Clay Science

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“…In addition to fragrance properties, studies have proven its biological activities as an antinociceptive, antileishmanial, and antimicrobial agent (Camargo and Vasconcelos, 2014). Nguemtchouin et al (2013) found 32 compounds in the EO extracted from fresh leaves of clove basil plants. In this case, the major compound was thymol (53.9%), followed by g-terpinene (17.8%).…”

Section: Characteristics Of Growth Field and Clove Basil Essential Oilmentioning

confidence: 99%

Antifungal activity, yield, and composition of Ocimum gratissimum essential oil

et al. 2017

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ABSTRACT. Ocimum gratissimum L. or clove basil, belongs to the Lamiaceae family, has various desirable uses and applications. Beyond its aromatic, seasoning, and medicinal applications, this plant also has antimicrobial activity. This study was aimed at assessing the antifungal activity, yield, and composition of the essential oil (EO) of O. gratissimum. The species was cultivated in garden beds with dystrophic red latosol soil type containing high organic-matter content. The EO was obtained by hydrodistillation of dried leaves in a modified Clevenger apparatus, followed by determination of its content. Chemical characterization was carried out by gas chromatographymass spectrometry (GC-MS). Microbial activity was assessed using the broth microdilution method, by determining the minimum inhibitory concentration (MIC), in order to compare the antimicrobial effect of EO in 10 isolates-Fusarium oxysporum f. sp tracheiphilum (CMM-0033), F. oxysporum f. sp. cubense (CMM-0813 and CMM-2819), F. oxysporum f. sp lycopersici (CMM-1104), F. solani (CMM-3828), Rhizoctonia solani (CMM-3274), and Macrophomina phaseolina (CMM-2715, CMM-3875, CMM-3615, and CMM-3650). The EO was a highly effective inhibitor of the studied phytopathogenic fungi, with MICs varying from 31.25 to 125 µg/mL. F. oxysporum f. sp lycopersici and R. solani were the most sensitive; both were inhibited at an MIC of 31.25 µg/mL. The EO content in the plant extract was 0.18%. Thirty chemical compounds were detected via GC-MS, with linalool (32.9%) being the major compound followed by 1,8-cineole (21.9%), both oxygenated monoterpenes. It can be concluded that clove basil EO is a highly effective antifungal agent, and therefore, a potential alternative for the control of plant pathogenic diseases.

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Ocimum gratissimum essential oil and modified montmorillonite clay, a means of controlling insect pests in stored products

Cited by 61 publications

References 21 publications

The efficacy of essential oil components loaded into montmorillonite against Aspergillus niger and Staphylococcus aureus

The efficacy of essential oil components loaded into montmorillonite against Aspergillus niger and Staphylococcus aureus

Characterization of inorganic and organic clay modified materials: An approach for adsorption of an insecticidal terpenic compound

Antifungal activity, yield, and composition of Ocimum gratissimum essential oil

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