And they are?
Nicotine is but one example.
The World Health Organization Program (WHO) had already seen the success rate decline and even increase in many areas BEFORE DDT was ever banned. The problem was that the arthropods and other insects DDT was designed to target quickly grew immune to the effects of 4,4'-(2,2,2-trichloroethane-1,1-diyl)bis(chlorobenzene).
| 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 we?ve learned that even mosquitoes that have developed an immunity to being directly poisoned by DDT are still repelled by it. | |
"A New Home for DDT" by Donald Roberts, published August 20, 2007. http://www.nytimes.com/2007/08/20/opinion/20roberts.htmlResearch that should have been done a long time ago, imo.[/quote]
It was done a long time ago. This is not new. Belize has sprayed DDT indoors until 1993. It is a good vector control because it is a good irritant for the mosquito. The problem, which you seem to quickly toss aside by comparing it to saccharin, is that DDT is not easily metabolised by animals (especially humans). It has a half-life of eight years and it also has a cumulative effect. In other words it builds in your system. It is a weak toxin (unlike Nicotine) and insects build immunity quickly. The reason it works as a repellent is due to its irritability to the mosquito. The problem is that the indoors need continual spraying and it does not work as well on the African variants as it does on the Central American ones.
You mislead. You use the data from the initial use of DDT, which was amazing. But that was when DDT was really knocking out mosquito populations. It will not do that now.
I'm not arguing in favor of introducing massive chemical loads into any ecology without understanding the ramifications. I'm arguing there was a better solution to the problems with DDT.
And DDT was studied. It was never exempt from studying by scientists. In fact, as I pointed out it was used in Belize for many decades doing exactly what you claim should be done with it. More than that, Chinese scientists have been studying the prevention and treatment of malaria for decades and that includes DDT. Just because the US banned it (in a country where malaria no longer exists as a real threat) does not mean that scientists could not study the substance. You know that.
According to what I can discover, you're wrong. I'm not arguing it would have eliminated malaria or prevented all malaria deaths. But the evidence I can find says DDT was effective in reducing malaria cases, reducing the spread of malaria from insects, and therefore in reducing the number of malaria deaths. So I stand by my assertion that banning DDT outright was one of the stupidest things ever done in the history of mankind.
It was effective for the short-term. It was never very effective in the regions where most malaria deaths occur today. World War I was one of the stupidest things ever done in the history of mankind. Banning DDT was just doing the best with the science they had.
I would be most interested in seeing you explain what is racist about suggesting biotechonology and GM crops could help farmers in Africa produce more food.
Certainly. You're suggesting that Africans cannot decide for themselves and that Europeans and Americans make the decisions for them. You do realize that Africans have very talented Agricultural Engineers and capable decision-makers as well.
The problem lies not with the African scientists or European and American diplomats out for their nations' own personal gains, but with the IMF, World Bank and American and European Agribusinesses who have destroyed any chance that the African farmer has of competing.