In recent news, UF has begun removing 150 trees found to be infected with the Huanglongbing virus on the Gainesville campus. For more information on this disease and the Asian Citrus psyllid that is its vector, check out these sites:
Solutions for Your Life: Citrus Greening (HLB)http://solutionsforyourlife.ufl.edu/hot_topics/agriculture/citrus_greening.html
UF/IFAS Extension Citrus Greening website
http://www.crec.ifas.ufl.edu/extension/greening/index.shtml
Citrus Greening (Huanglongbing) on EDIS
http://edis.ifas.ufl.edu/topic_citrus_greening