Word: ddt
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Dates: during 1970-1979
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WILLIAMS believes he is hot on the trail of "third generation pesticides" that are far superior to the lead arsenate and DDT that epitomize the two earlier generations...
Presumably, DDT reaches the ground on falling leaves, and earthworms surfacing at night accumulate the toxin when they feed. DDT then passes up the food chain to the robins...
...most thorough studying linking DDT to robin kills in New England was done five years ago at Dartmouth. After a "typical" DDT application, the robin population dropped 70 percent. Many robins and other birds were found in convulsions...
...chemicals that are replacing DDT nowadays have the advantage of breaking down more quickly in the environment, but they still hit a broad spectrum of insects-often beneficial ones...
...hormonal insecticides were to succeed, they would have to attack only one pest, while leaving the species' natural insect predators unharmed. Otherwise, hormones would be merely a more potent variety of DDT from an ecologist's point of view...