- Alternaria Rot (Alternaria citri)
- Anthracnose (Colletotrichum gloeosporioides)
- Armillaria Root Rot
- Botrytis Rot
- Brown Rot (Phytophthora spp.)
- Dothiorella Gummosis (Botryosphaeria ribis)
- Dry Root Rot (Fusarium solani)
- Phytophthora Root Rot and Gummosis
- Septoria Spot
- Psorosis (Citrus psorosis ophiovirus)
- Stubborn Disease (Spiroplasma citri)
- Tristeza Disease Complex (Citrus tristeza virus, CTV) Inquire about strain-differentiating tests
- Bacterial Blast (Pseudomonas syringae)
- Citrus viroids
Exotic diseases:
- Citrus Huanglongbing Disease (HLB)
- Citrus canker (Xanthomonas citri subsp. citri)