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Chitosan/Interfering RNA Nanoparticle Mediated Gene Silencing in Disease Vector Mosquito Larvae

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Surface functionalization of silver nanoparticles: novel applications for insect vector control.

Aishwarya Sooresh¹, Hyeogsun Kwon, Robert Taylor

¹Interdisciplinary Program in Material Science & Engineering, Texas A&M University, College Station, Texas 77843, USA.

ACS Applied Materials & Interfaces

|September 30, 2011

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A new nanosilver-pesticide conjugate effectively kills disease-carrying mosquitoes. This nanoparticle-based approach offers a promising strategy for insect vector control, enhancing safety and efficacy against arthropod-borne diseases.

Area of Science:

Nanotechnology
Entomology
Toxicology

Background:

Insect vectors like mosquitoes transmit debilitating diseases.
Current control methods have limitations in efficacy and safety.
A novel approach is needed for effective arthropod vector control.

Purpose of the Study:

To develop a novel nanoparticle-pesticide core-shell conjugate.
To evaluate the efficacy of a nanosilver-deltamethrin conjugate against mosquitoes.

Main Methods:

Synthesized a core-shell conjugate of nanosilver and deltamethrin.
Characterized the conjugate using electron microscopy and FTIR spectroscopy.
Conducted mosquito bioassays to determine mortality rates and silver presence.

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Main Results:

Confirmed the nanosilver core (15 nm) was successfully coated with deltamethrin.
Achieved significant mosquito mortality (9 × 10⁻⁴ M) within 24 hours.
Detected silver in mosquito hemolymph, indicating conjugate uptake.

Conclusions:

The nanoconjugate retains the pesticide's insecticidal activity.
This nanoparticle-pesticide conjugate is effective at low concentrations.
Demonstrated potential for nanoparticle surfaces in insect vector control.