As a retired ecologist/entomologist, I continue to follow the DDT option with great interest. In Fiji, I saw how massive application of chlorohydrocarbon pesticides could select for resistant survivors within 3 years.
I had hoped that wall applications might be less selective for mosquitoes before or after they fed. However, I gather that our unnatural selection has created strains flying straight into a hut, feeding, and flying straight out again. Mosquito nets treated with insecticide, not necessarily DDT, seem to be a better bet, although it is sad to realize how few in the tropics have and use such nets. Prevention of malaria and many other tropical diseases will continue to require a combination of research, education, immunization,=20 sanitation, and physical protection! I have nothing against DDT itself; it did a fine job on my crab lice in Korea! Dr. Dexter Hinckley=20
