Polymer nanoparticles containing essential oils: new options for mosquito control

Area of Science:

• Environmental Science
• Public Health
• Nanotechnology

Background:

• Mosquitoes transmit deadly diseases globally.
• Conventional insecticides cause resistance and environmental harm.
• Developing sustainable mosquito control is a public health priority.

Purpose of the Study:

• To develop and evaluate essential oil-loaded polymer nanoparticles (PN) for mosquito control.
• To assess the larvicidal efficacy of geranium and bergamot essential oils encapsulated in PEG and Chitosan nanoparticles.
• To compare the physicochemical properties and larvicidal activity of different PN formulations.

Main Methods:

• Two types of polymer nanoparticles (PN) were synthesized using polyethylene glycol (PEG) and chitosan (Qx) as matrices.
• Essential oils from geranium (Geranium maculatum) and bergamot (Citrus bergamia) were loaded into the PN.
• Physicochemical characterization of PN (size, encapsulation efficiency) was performed.
• Acute and residual larvicidal activity against Culex pipiens pipiens was evaluated.

Main Results:

• PEG-PN had sizes <255 nm and 68-77% encapsulation efficiency.
• Qx-PN had sizes <535 nm and 22-38% encapsulation efficiency.
• Chitosan-based PN (Qx-PN) demonstrated significantly higher acute and residual larvicidal activity compared to PEG-PN.

Conclusions:

• Polymer nanoparticles loaded with essential oils represent a viable eco-friendly approach for mosquito control.
• Chitosan-based nanoparticles show enhanced larvicidal efficacy, offering a promising alternative to synthetic insecticides.
• This research contributes to developing sustainable public health tools against mosquito-borne diseases.