Across
the Country, Invasive Pest Species Are Causing Problems (Sep 24,
2009) National Pest Management Association.
Conservative estimates by the Smithsonian
Institution put the number of known insect species found in the United
States at more than 91,000 -- not
including an additional 73,000 unidentified species. These numbers are
likely to climb as increased international travel and shipping provide
a means for foreign insects (invasive species), to more easily infiltrate
the country. The National Pest Management Association urges vigilance
against invasive species.