| Common Name | Causal Organism |
|---|---|
| Citrus Black Spot | Fungus (Guignardia citricapra) |
| Citrus Blight | Unknown |
| Citrus Canker | Bacterium (Xanthomonas axonopodis) |
| Citrus Greening (also called Huanglongbing, HLB, or Yellow Dragon Disease) |
Bacterium (Candidatus Liberibacter africanus, or Candidatus Liberibacter americanus, or Candidatus Liberibacter asiaticus) |
| Citrus Leprosis | Citrus Leprosis Virus (CiLV) |
| Citrus Psorosis (Scaly Bark) | Citrus Psorosis Virus (CPsV) (genus Ophiovirus) |
| Citrus Scab | Fungus (Elsinoe fawcetti) |
| Citrus Tristeza | Citrus Tristeza Virus (CTV) (genus Closterovirus) |
| Citrus Variegated Chlorosis (CVC) | Bacterium (Xylella fastidiosa) |
| Stubborn Disease of Citrus | Mycoplasmalike pathogen (Spiroplasma citri) |
| Sweet Orange Scab | Fungus (Elsinoe australis) |