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Edward Knipling

Age: 90

U.S. government entomologist who devised a technique to sterilize male screwworms, essentially eradicating the insect and saving livestock from a fatal plague. Knipling sterilized the flies with an X-ray machine. The method, which doesn't require the use of pesticides, has been used to control other insect populations.

Died: Arlington, Va., March 17, 2000

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