Sentences with phrase «spraying against malaria»
To evaluate the efficacy of indoor residual spraying against malaria, scientists place a piece of tape on the wall, pull it off, and then soak it in a chemical solution to see how much pyrethroid insecticide was applied.
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In September the World Health Organization openly endorsed indoor spraying of DDT, saying it is not only the best weapon against malaria, it is also cheaper and more effective than other insecticides.