Word: ddt
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Some experimenters have found the beetles unharmed after laboratory exposure to DDT. Others have gotten the opposite results...
...days, the watchman would see a cockroach running down the corridor, and he'd spray the whole place with DDT," Williams complained. "Of course I went right out through the ceiling. They can put you out of business overnight...
Before tree specialists stopped using hard pesticides like DDT to combat the elm disease, insecticide killings of birds were apparently common in Cambridge. Charles F. Walcott, a retired physician and amateur ornithologist, recalls seeing three insect-eating species-the robin, hermit thrush, and flicker-in "typical DDT convulsions" on his property off Sparks Street...
...When DDT came on the scene after World War II. Cambridge's robin population took a sudden drop. "Once, every morning before dawn, there was a rolling chorus of robins." Walcott noted. "To my cars, there has not been a robin chorus in Cambridge since...
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...