What year was that?
http://ag.arizona.edu/pubs/general/resrpt1997/karnal.html
Teliospores of KB were found in 1995 wheat samples from Central Arizona on March 8, 1996.
http://www.sciencedaily.com/releases/2010/04/100427131401.htm
(Apr. 27, 2010) — Research came full circle on April 16 as the Animal and Plant Health Inspection Service amended the Karnal bunt quarantine areas in Arizona, California and Texas, according to a Texas AgriLife Research scientist.