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DDT was first synthesized in 1874 by the Austrian chemist Othmar Zeidler. DDT's insecticidal action was discovered by the Swiss chemist Paul Hermann Müller in 1939. DDT was used in the second half of World War II to limit the spread of the insect-borne diseases malaria and typhus among civilians and troops.
Silent Spring is an environmental science book by Rachel Carson. [1] Published on September 27, 1962, the book documented the environmental harm caused by the indiscriminate use of DDT, a pesticide used by soldiers during World War II.
The use of DDT in the United States was banned in 1972, except for a limited exemption for public health uses. Public concern about the usage of DDT was largely influenced by the book, Silent Spring, written by Rachel Carson. [9] The ban on DDT is cited by scientists as a major factor in the comeback of the bald eagle in the continental United ...
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DDT has also been known to kill beneficial insects, such as wasps that kill caterpillars that, unchecked, destroy thatched roofs. [14] As a result, Mozambique's chief of infectious disease control, Avertino Barreto, says that resistance to DDT spraying is "homegrown", not due to "pressure from environmentalists". "They only want us to use DDT ...
First it was the eerie images of barrels leaking on the seafloor not far from Catalina Island. Then the shocking realization that the nation’s largest manufacturer of DDT had once used the ocean ...
Insect growth regulators, such as hydroprene (Gentrol), are also sometimes used. [19] Populations in Arkansas have been found to be highly resistant to DDT, with an LD 50 of more than 100,000 ppm. [20] DDT was seen to make bed bugs more active in studies conducted in Africa. [21] Bed bug pesticide-resistance appears to be increasing dramatically.
DDT and polychlorinated biphenyls (PCBs) move from contaminated sediments into the water, so although the dumping of DDT stopped in 1982, the Palos Verdes Shelf remains contaminated. [6] DDT and PCBs enter the food chain through worms and micro-organisms living in the sediment. Fish may eat many of these organisms, causing the DDT and PCBs to ...