Global red fire ant invasions traced to southern US

ScienceDaily (Feb. 25, 2011) — Red imported fire ant invasions around the globe in recent years can now be traced to the southern U.S., where the nuisance insect gained a foothold in the 1930s, new University of Florida research has found.

http://www.sciencedaily.com/releases/2011/02/110224145558.htm