Damn. Are you truly that ******* stupid? DDT is not banned from use in third world nations for use on malarial mosquitoes. It is not used in many places because the mosquitoes have developed an immunity to it. If you are going to regurgitate the ravings of an obese junkie on the radio, at least credit your source.
http://www.nytimes.com/2007/08/20/opinion/20roberts.html?_r=0
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.
The news may seem surprising, as some mosquitoes worldwide are already resistant to DDT. But weve learned that even mosquitoes that have developed an immunity to being directly poisoned by DDT are still repelled by it.
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Today, indoor DDT spraying to control malaria in Africa is supported by the World Health Organization; the Global Fund to Fight AIDS, Tuberculosis and Malaria; and the United States Agency for International Development.
The remaining concern has been that the greater use of DDT in Africa would only lead mosquitoes to develop resistance to it. Decades ago, such resistance developed wherever DDT crop spraying was common. After the DDT bans went into effect in the United States and elsewhere, it continued to be used extensively for agriculture in Africa, and this exerted a powerful pressure on mosquitoes there to develop resistance. prohibited for crop spraying in Africa, a few mosquito species there areAlthough DDT is now still resistant to it. But DDT has other mechanisms of acting against mosquitoes beyond killing them. It also functions as a spatial repellent, keeping mosquitoes from entering areas where it has been sprayed, and as a contact irritant, making insects that come in contact with it so irritated they leave.
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DDTs spatial repellency, by keeping mosquitoes from making physical contact, reduces the likelihood that the insects will develop resistance. Even those mosquitoes already resistant to poisoning by DDT are repelled by it.
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.