Environmental factors, such as wind and rain, cannot be controlled however, the spread of pests by humans can be managed by preventing transportation of infected plant material. These regulated citrus diseases can be highly contagious and spread by wind-driven rain, overhead irrigation, flooding, and human movement. They threaten commercial production by acting as a source of disease introductions and reservoirs for pathogens and pest organisms. Homegrown citrus trees account for the majority of regulated disease detections in the state. These regulated pests have significantly reduced the Florida and California citrus industries. Most recently, Baldwin County is under a quarantine for citrus canker. Currently, Alabama is under a statewide quarantine for ACP, while Baldwin and Mobile Counties are under an HLB and SOS quarantine. All of these pests except CBS have been identified in Alabama. Citrus nursery stock tag with the nursery name, registration number, and limited permit statement.įive federally regulated citrus pests have been established in the United States and threaten the citrus industry: huanglongbing (HLB or citrus greening), Asian citrus psyllid (ACP), citrus canker (CC), citrus black spot (CBS), and sweet orange scab (SOS).
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