A pesticide researcher, Donald Roberts, whose article in Public Library of Science Biology I blogged earlier this month, speaks out in a New York Times op/ed on the continuing usefulness of DDT in combating disease-carrying mosquitoes. To wit:
DDT, the miracle insecticide turned environmental bogeyman, is once again playing an important role in public health. In the malaria-plagued regions of Africa, where mosquitoes are becoming resistant to other chemicals, DDT is now being used as an indoor repellent. Research that I and my colleagues recently conducted shows that DDT is the most effective pesticide for spraying on walls, because it can keep mosquitoes from even entering the room….
In our studies, in which we sprayed DDT on the walls of huts in Thailand, three out of every five test mosquitoes sensed the presence of DDT molecules and would not enter the huts. Many of those that did enter and made contact with DDT became irritated and quickly flew out….
It would be a mistake to think we could rely on DDT alone to fight mosquitoes in Africa. Fortunately, research aimed at developing new and better insecticides continues — thanks especially to the work of the international Innovative Vector Control Consortium. Until a suitable alternative is found, however, DDT remains the cheapest and most effective long-term malaria fighter we have.
Whole New York Times op/ed here.
Thanks to frequent H&R commenter AMVHuck for the heads up.