Where will our next invaders come from?

New research shows that the greatest threat of invasive species introduction comes from within the United States and not from outside the country. “Our findings have significant implications for biosecurity policy and the need to consider security measures beyond established national borders,” said Matthew Thomas, professor of entomology, Penn State. The researchers found that, while all the top 100 known exotic insect pests for the entire U.S. already exist in the country, the top lists for each of the states included many species that are yet to establish in those states. In all cases except one, the absent pests do occur somewhere else in the U.S. and more often than not, they are found in a neighboring state. In fact, 12 states had every pest species that they were missing located just across their borders in a neighboring state.Read More – http://cts.vresp.com/c/?CenterforAquaticNuis/a52c4b1814/f9ddf70f4a/e4cb45da1f

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