Word: peskiest
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Dates: during 1940-1949
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British scientists found last year that IPC killed certain grain plants. U.S. scientists took the hint and tried the stuff on quackgrass, alias witchgrass, one of the peskiest weeds in the northern U.S. As little as 10 lbs. an acre, Agriculture reports, does the deed, killing even the nine-lived underground stems (stolons) which generations of farmers have grubbed from the soil by hand...
Except for the shrill whine of their wings, most varieties make no sound audible to man. But the Cornell researchers caged four of the peskiest species-Anopheles quadrimaculatus (malaria), Aedes aegypti (yellow fever), Aedes albopictus (dengue) and Culex pipiens (New Jersey) -and confronted them with a microphone and high-powered amplifier. A surprising variety of noises, resembling bird calls, emerged. Mosquitoes, it turned out, have voices in the middle ranges of human hearing (frequencies of 250 to 1,500 cycles per second). Females bellow; male voices are thin and high-pitched...