Florida Battles Citrus Canker NPR's Phillip Davis reports that Florida's battle to eradicate citrus canker has caught home owners in the middle. State officials have been destroying blighted trees on residential property without permission. Healthy trees within a certain radius have also been destroyed. A Florida judge ruled this was unconstitutional and that officials needed to have permission before entering private property. Citrus canker is a threat to the state's $2.3 billion citrus industry.