What do monomolecular films do to help control mosquito larvae?

Monomolecular films are very thin layers of surfactant that are spread across the surface of water. Their primary function in mosquito control is to decrease surface tension. When the surface tension of water is reduced, mosquito larvae that normally rely on the surface for buoyancy and access to air are significantly impacted. The larvae can struggle to maintain their position at the water's surface, leading to increased difficulty in feeding and potentially resulting in their immersion and subsequent drowning.

This method of control is particularly useful as it targets the immature stage of mosquitoes without the use of chemicals that can be harmful to the environment. By focusing on the surface tension rather than more aggressive methods, such as chemical larvicides, monomolecular films offer a more environmentally friendly approach to mosquito management.