Overview
Invasive species include nonnative, alien, or exotic
plant pests (such as insects, weeds, or pathogens); animal
and zoonotic disease pathogens, which can transmit diseases
between animals and humans; or other organisms that can
cause economic or environmental harm to U.S. agriculture,
range, and forest systems if they enter the United States.
USDA and other Federal and State Government agencies have
programs to prevent entry and to detect, monitor, and
manage invasive species that enter the United States or
spread to new regions. ERS conducts and funds research
to support these efforts through the Program of Research
on the Economics of Invasive Species Management (PREISM).
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