Magazine content is available exclusively for TIME subscribers.Science: DDT Dangers
The more entomologists study DDT, the new wonder insecticide, the more convinced they are that it may be a two-edged sword that harms as well as helps. To find out, they have lately taken to spraying entire islands and other large areas with it. The city of Toronto has now given a detailed report on one such test.
The scene was Toronto's Algonquin Park, heavily infested with budworm moths. City officials first gave the park a thorough DDT spraying by autogiro, then counted the survivors. Results: the deadly chemical killed not only the moths and other insects, but practically all invertebrates, especially...
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