Citrus Huanglongbing: The Pathogen and Its Impact

Fig. 34. Initial HLB survey map demonstrating 5-mi incremental survey as it progressed northward up the south east coast of Florida from the initial Florida City and Pinecrest discoveries, in an attempt to delimit the disease incursion. It was immediately apparent that the disease has already spread and become established alone the residential southeast coast of Florida as far north as Stuart. The survey then turned to the nearest commercial plantings, located in southeast Hendry Co., separated from the residential area by the Florida Everglades swamp (a void with no citrus), and HLB was confirmed in this area as well. Measurements indicate the approximate distance between these commercial infections and the initial discovery in Florida City (90 mi) and to the nearest residential discovery west of Davie (55 mi).



Image from Plant Health Progress article:
Citrus Huanglongbing: The Pathogen and Its Impact