Can be spread by natural means (uncontrollable) and by humans (controllable)
Natural spread by wind-driven rain, overhead irrigation, flooding, incidental spread by insects and birds, animals
Human spread responsible for moving canker over long distances around state (examples: Miami to Cape Coral (Lee County), Miami to Golden Gate (Collier County), Miami to Orlando (Orange County)
Human transport of infected/exposed plant material is primary means of spreading the canker pathogen over long distance
