<p>Because DDT is the only insecticide that remains effective for more than a year, Walter Focke of the University of Pretoria in South Africa will investigate how insecticides degrade when applied on an indoor surface. Focke will then study whether combining the insecticide with paint to create a "whitewash" can mitigate this disintegration and enhance stability.</p>


Because DDT is the only insecticide that remains effective for more than a year, Walter Focke of the University of Pretoria in South Africa will investigate how insecticides degrade when applied on an indoor surface. Focke will then study whether combining the insecticide with paint to create a "whitewash" can mitigate this disintegration and enhance stability.