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Published online 6 February 2003 | Nature | doi:10.1038/news030203-6

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Invaders leave enemies behind

Old adversaries could control invasive species.

Plant sand animals leave most of their enemies in Europe when they cross the Atlantic to invade the United States, show two new studies. The predators and parasites that are left behind could be used to control alien species that are overrunning the Americas.

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