Efficacy of encapsulated and non-encapsulated thyme essential oil (Thymus vulgaris L.) in the control of Sitophilus zeamais and its effects on the quality of corn grains throughout storage

Barros, Felipe Antonio Primon de; Radünz, Marjana; Scariot, Maurício Albertoni; Camargo, Taiane Mota; Nunes, Camila Francine Paes; Souza, Renan R. de; Gilson, Ítalo Kael; Hackbart, Helen Cristina dos Santos; Radünz, Lauri Lourenço; Oliveira, J. Vladimir; Tramontin, Marco Aurélio; Radünz, André Luiz; Magro, Jacir Dal

doi:10.1016/j.cropro.2021.105885

Cited by 29 publications

(8 citation statements)

References 54 publications

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“…Concerning lemongrass EO, its composition was rich in aldehydes (45.5% geranial and 33.7% neral) and other compounds, such as geraniol (4.5%), geranyl acetate (1.5%), citronellal (1.3%), and citronellol (1.1%). Similar chemical composition for oregano [ 28 ], thyme [ 29 , 30 ], and lemongrass [ 31 , 32 ] EOs have been previously reported in the literature.…”

Section: Resultssupporting

confidence: 78%

An Optimization of Oregano, Thyme, and Lemongrass Essential Oil Blend to Simultaneous Inactivation of Relevant Foodborne Pathogens by Simplex–Centroid Mixture Design

et al. 2022

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(1) Background: This study aimed to use the simplex–centroid mixture design methodology coupled with a microdilution assay to predict optimal essential oil (EO) formulations against three potential foodborne pathogens simultaneously through the desirability (D) function. (2) Methods: Oregano (ORE; Origanum vulgare), thyme (THY; Thymus vulgaris), and lemongrass (LG; Cymbopogon citratus) and their blends were evaluated concerning minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) for Salmonella enterica serotype Enteritidis, Escherichia coli and Staphylococcus aureus. (3) Results: THY combined with ORE or LG were the most promising EO formulations in inhibiting and killing each bacterium separately. Regarding the simultaneous effect, the optimal proportion for maximum inhibition was composed of 75% ORE, 15% THY, and 10% LG, while for maximum inactivation was 50% ORE, 40% THY, and 10% LG. (4) Conclusion: The multiresponse optimization allowed identifying an EO blend to simultaneously control three potential foodborne pathogens. This first report could be a helpful natural and green alternative for the industry to produce safer food products and mitigate public health risks.

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Section: Resultssupporting

confidence: 78%

An Optimization of Oregano, Thyme, and Lemongrass Essential Oil Blend to Simultaneous Inactivation of Relevant Foodborne Pathogens by Simplex–Centroid Mixture Design

et al. 2022

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“…Consequently, many researchers who developed several methods such as: films, microencapsulation via spray-drying, nanoprecipitation, electrohydrodynamic processes electrospinning, and electrospraying [51][52][53]. Encapsulation is most widely used in the food industry [31,51,52], but can find use in the pharmaceutical sector [53], and in some cases in plant protection [46,54]. Using different techniques and/or carriers, many EOs were encapsulated, such are Basil, Cinnamon, Carvacrol, Jasmine, Lime, Thyme, Lemon, Lemongrass, Orange, Oregano, Peppermint, Rosemary, etc.…”

Section: Discussionmentioning

confidence: 99%

“…Using different techniques and/or carriers, many EOs were encapsulated, such are Basil, Cinnamon, Carvacrol, Jasmine, Lime, Thyme, Lemon, Lemongrass, Orange, Oregano, Peppermint, Rosemary, etc. [46,[52][53][54][55] Jovanović et al developed a biodegradable, eco-friendly material based on natural polymers and lemongrass (Cymbopogon citratus L.), and essential oil (LEO) for application as a green pesticide against the potato tuber moth (P. operculella) [46]. Thyme was encapsulated by spray drying and evaluated for efficacy on the mortality and persistence of corn weevil Sitophilus zeamais [54].…”

Section: Discussionmentioning

confidence: 99%

“…[46,[52][53][54][55] Jovanović et al developed a biodegradable, eco-friendly material based on natural polymers and lemongrass (Cymbopogon citratus L.), and essential oil (LEO) for application as a green pesticide against the potato tuber moth (P. operculella) [46]. Thyme was encapsulated by spray drying and evaluated for efficacy on the mortality and persistence of corn weevil Sitophilus zeamais [54]. Hill et al microencapsulated inclusion complexes of Cinnamon bark extract, trans-cinnamaldehyde, clove bud extract, eugenol, and a trans-cinnamaldehyde:eugenol (2:1) mixture by freeze-drying [28].…”

Section: Discussionmentioning

confidence: 99%

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Encapsulated Clove Bud Essential Oil: A New Perspective as an Eco-Friendly Biopesticide

Milićević¹,

Krnjajić

Stević

et al. 2022

Agriculture

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In this work by encapsulation technique we have synthetized three new clove bud essential oil (CEO) Emulsifiable Concentrate (EC) formulations depending on the carrier (synthetic zeolite- F-CSZ, nature zeolite- F-CNZ and gelatin- F-CG). The main idea was to develop an eco-friendly biopesticide that can find use in plant protection as an alternative to the use of conventional pesticides. By encapsulation we wanted to enable water solubility and ensure prolonged efficacy of the essential oil. Biological activity of designed CEO formulations was tested on potato tuber moth Phthorimaea operculella (fumigant mode of action), gray mold fungal pathogen Botrytis cinerea (preserver coatings), and soft rotting bacterial pathogens Pectobacterium carotovorum (subsp. carotovorum and brasiliensis) and Dickeya dianthicola (direct competition). CEO formulations evinced a prolonged action on mortality of P. operculella during the insects’ exposure to the concentration of the emulsions of 40 µL L−1 air. The mortality gradually decreased from a probability of 100% after the first 24 h to 50% after 5 days for F-CSZ or after 4 days for F-CNZ and F-CG. The most promising formulation is F-CSZ enabling activity during 14 days of exposure, while the effect of the other two formulations lasted 10 days. All three formulations produced a strong fungicidal effect against B. cinerea by preventing infection and disease development. The best efficacy was evidenced with F-CSZ (synthetic zeolite as a carrier) showing 100% efficacy when it was used even at the lowest tested concentration of active CEO (1%). The results of in vitro testing against soft rot pathogens determined the MIC value of CEO formulations to be 1% of active CEO. By this research, we present a novel perspective on the use of essential oils as an alternative, environmental biopesticide. CEO formulations can be commercially exploited as a fumigant or preserver coatings to extend the shelf life of stored products or the fresh-fruit market.

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“…The loading capacity (LC) was determined by spectrophotometry for the content of phenolic compounds and conducted according to Barros et al (2022). For this, 5 mg of the bers and 1.5 mL of 75% ethanol (in distilled water, v/v) were homogenized in a vortex for roughly 1 min.…”

Section: Loading Capacitymentioning

confidence: 99%

Zein electrospun fibers with red onion extract (Allium cepa L.): Bioactive compounds, thermal stability, hydrophilicity, and antioxidant activity

Cruz,

Pires,

Jansen

et al. 2023

Preprint

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Onions are rich in bioactive and volatile compounds with antioxidant activity. When concentrated in plant extracts and applied directly into food matrices or packaging, they are sensitive to external factors and may have undesirable sensory attributes, such as odors. Therefore, this study sought to encapsulate red onion extract (ROE) in different concentrations (10, 20, 30, and 40%, v/v) into zein fibers by electrospinning. The major volatile compound in ROE was 3(2H)-furanone, 2-hexyl-5-methyl. Adding ROE into the polymeric solutions increased their electrical conductivity and decreased the apparent viscosity, thus decreasing the average diameter of the fibers. The loading capacity of ROE on fibers ranged from 77.3 to 91.5%. The fibers’ random and continuous morphology showed beads at the highest ROE concentration (40%). Fibers membranes showed lower values for contact angles as ROE was added. The antioxidant activity of the fibers ranged from 32.5 to 57.3%.

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Efficacy of encapsulated and non-encapsulated thyme essential oil (Thymus vulgaris L.) in the control of Sitophilus zeamais and its effects on the quality of corn grains throughout storage

Cited by 29 publications

References 54 publications

An Optimization of Oregano, Thyme, and Lemongrass Essential Oil Blend to Simultaneous Inactivation of Relevant Foodborne Pathogens by Simplex–Centroid Mixture Design

An Optimization of Oregano, Thyme, and Lemongrass Essential Oil Blend to Simultaneous Inactivation of Relevant Foodborne Pathogens by Simplex–Centroid Mixture Design

Encapsulated Clove Bud Essential Oil: A New Perspective as an Eco-Friendly Biopesticide

Zein electrospun fibers with red onion extract (Allium cepa L.): Bioactive compounds, thermal stability, hydrophilicity, and antioxidant activity

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