How Brazil does it

How does Brazil, the world's largest citrus producer, deals with citrus canker and greening? Security -- high level security.

The Sarasota Herald Tribune has a great article that highlights Citrograf, one of the largest and most secure citrus tree nurseries in the world -- "a 50-acre fortress ringed by a 10-foot-high chain-link fence topped with barbed wire and defended by a thick, steel gate. The operation is run with prison-like efficiency. Whistles blow when it is time to go to lunch and sound again when it is time to go back to work. Nobody is allowed to deviate from the litany of strict rules. The only thing missing is guard towers..." ~ link