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An effective way to control mosquitoes

15.06.2020

An aerosol made by combining a type of volcanic glass with water has shown an effective method to control malaria-carrying mosquitoes, according to a new study. The results obtained may be useful for reducing the populations of these insects in Africa.

Malaria, an infectious disease transmitted by mosquitoes. Every year, the disease claims the lives of about 400 people in Africa.

There are many remedies that repel bloodsuckers. But mosquitoes are becoming increasingly resistant to commonly used insecticides such as pyrethroids, so alternative safe chemicals to control them are very important.

Scientists have found that a volcanic mineral, perlite, most commonly used in building materials and as a soil additive in gardens, may also help control malaria mosquitoes.

A spray based on it (Imergard WP) was developed for the treatment of interior walls. This aerosol does not contain any additional chemicals, is non-toxic to mammals and will be cost effective. Early results show that mosquitoes are not resistant to perlite aerosol.

The results showed that the mosquito mortality rate in rooms treated with Imergard WP was above 80% within five months of treatment and 78% within six months.

"The statically transferred perlite particles essentially dehydrate the mosquitoes," said Mike Roe, NC State Distinguished Professor of Entomology William Neil Reynolds.

According to scientists, mosquitoes die within a few hours after contact with the treated surface.

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