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Predators battle bugs, become pests themselves
Imported insects have been deployed as footsoldiers in the fight against invasive bugs and plants that causebillions of dollars in damage each year. But some of those importsare proving to be pests themselves that upset the balance of natureand threaten native species.
A weevil released to attack a weed has veered off target and isgobbling up a native plant in Nebraska. A fly that was supposed...
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