Under threat from the north as well as the south.


http://www.twincities.com/ci_13925658?nclick_check=1

Diseased fruit intercepted at border
Associated Press
Updated: 12/04/2009 08:06:39 AM CST

PORTAL, N.D. — Agents at the U.S.-Canada border station at Portal intercepted citrus fruit infected with a plant disease they say is not yet present in the United States.

Customs and Border Protection says agriculture specialists in October twice intercepted mandarin oranges that were infected with citrus black spot disease.

Authorities say the fruit was found in the vehicles of travelers coming from Canada who were destined for Sun Belt states, where citrus industries could be devastated by the disease.

Some information about this particular pathogen.

Citrus Diseases Exotic to Florida: Black Spot
http://edis.ifas.ufl.edu/pp135

.....Alan.