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Lucia, Alejandro; Guzmán, Eduardo
Advances in colloid and interface science, January 2021, 2021-Jan, 2021-01-00, 20210101, Letnik: 287Journal Article
Most of the traditional strategies used for facing the management of insect pest and diseases have started to fail due to different toxicological issues such as the resistance of target organism and the impact on environment and human health. This has made mandatory to seek new effective strategies, which minimize the risks and hazards without compromising the effectiveness of the products. The use of essential oils, their components and semiochemicals (pheromones and allelochemicals) has become a promising safe and eco-sustainable alternative for controlling insect pest and pathogens. However, the practical applications of this type of molecules remain rather limited because their high volatility, poor solubility in water and low chemical stability. Therefore, it is required to design strategies enabling their use without any alteration of their biological and chemical properties. Oil-in-water nano/microemulsions are currently considered as promising tools for taking advantage of the bioactivity of essential oils and their components against insects and other pathogens. Furthermore, these colloidal systems also allows the encapsulation and controlled release of semiochemicals, which enables their use in traps for monitoring, trapping or mating disruption of insects, and in push-pull strategies for their behavioral manipulation. This has been possible because the use of nano/microemulsions allows combining the protection provided by the hydrophobic environment created within the droplets with the enhanced dispersion of the molecules in an aqueous environment, which favors the handling of the bioactive molecules, and limits their degradation, without any detrimental effect over their biological activity. This review analyzes some of the most recent advances on the use of emulsion-like dispersions as a tool for controlling insect pest and pathogens. It is worth noting that even though the current physico-chemical knowledge about these systems is relatively poor, a deeper study of the physico-chemical aspects of nanoemulsions/microemulsions containing essential oils, their components or semiochemicals, may help for developing most effective formulations, enabling the generalization of their use. Display omitted •Essential oils (EOs), their components (EOCs) or semiochemicals (SE) are allows controlling insect pests and pathogens.•Instability and volatility of EOs, EOCs or SEs require of strategies for taking advantage of their biological activity.•Micro-/nanoemulsions are good tools for design formulations with EOs, EOCs or SEs.•EOs, EOCs or SEs contained within emulsion-like systems commonly present higher biological activity that their free form.•Physico-chemical and operative parameter are essential in the characteristics of the micro−/nanoemulsions.
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in: SICRIS
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