Citrus Canker: The Pathogen and Its Impact

Fig. 3. Temporal progression of citrus canker infested sections in the Miami-Dade and Broward County area. Each square represents 1.0 mi2 sections. Red squares represent new infested sections during that year. Blue squares are previous year(s) infestations.



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