Chemists create new crystal form of insecticide, boosting its ability to fight mosquitoes and malaria  October 12, 2020 A team of researchers in the US (New York University, University of Puerto Rico) heated the commercially available form of deltamethrin to 110°C/230°F for a few minutes and let it cool to room temperature; this resulted in a new crystallized form of deltamethrin, composed of long, tiny fibers radiating from a single point. When mosquitoes step on insecticide crystals, the insecticide is absorbed through their feet and, if effective, kills the mosquitoes. In tests the new form was up to 12 times more effective against mosquitoes than the existing form. The new form also remained stable—and […]