Enhanced mosquito sex separation using NaCl for optimised sterile insect technique and incompatible insect technique...

Area of Science:

• Entomology
• Vector Control
• Insect Physiology

Background:

• Sterile Insect Technique (SIT) and Incompatible Insect Technique (IIT) are crucial for mosquito control.
• Accurate separation of male and female mosquitoes is essential for the efficacy of these programs.
• High female contamination rates in released males can compromise control efforts.

Purpose of the Study:

• To develop and evaluate a novel method for improving the accuracy of sex separation in mosquito populations.
• To reduce female contamination in mass-reared male mosquitoes intended for SIT and IIT programs.
• To investigate the impact of salinity on mosquito development.

Main Methods:

• Implementation of a 15% sodium chloride (NaCl) treatment for mosquito larvae and pupae.
• Integration of an automated mechanical separation system.
• Evaluation of female contamination rates before and after treatment and separation.

Main Results:

• A 30-fold reduction in female contamination rates among released males was achieved.
• The integrated approach demonstrated high efficiency in separating sexes.
• Salinity treatment showed specific effects on mosquito larvae and pupae development.

Conclusions:

• The combined NaCl treatment and automated system offer a highly effective solution for sex separation in mosquito control.
• This novel strategy significantly improves the purity of male releases for SIT and IIT.
• The findings support the optimization of large-scale mosquito production for effective disease vector management.