Citrus Canker: The Pathogen and Its Impact

Fig. 37. (A) Map of eastern U.S. with barometric depression, L, and surrounding comma shaped weather pattern. (B) Doppler radar scan of same weather system as front passes through south Florida. (C) Diagram of frontal winds and rain and distribution pattern of one-square-mile sections infested with citrus canker.



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