- Most severe on grapefruit, lemon, tangelos and early season sweet oranges
- Grapefruit is highly susceptible
- Found on fruit and leaves
- First appear as yellow spots on the upper leaf surface, with a corresponding slightly raised, pale orange to yellowish brown blister on the lower surface
- Later the symptoms on both surfaces become darker brown or black and show a more 'greasy' appearance
- Fruit - fruit exhibit necrotic specks in the epidermis between the oil glands
- http://idtools.org/id/citrus/diseases/factsheet.php?name=Greasy+spot
- Two sprays are needed to control greasy spot in southwest Florida. The first spray should be scheduled in May-June and the second in July-August. Thorough coverage of the underside of leaves with Copper Fungicide
plus Oil
is important and necessary for the control of greasy spot
- http://edis.ifas.ufl.edu/hs141
- Splashed appearance on BOTH SIDES
- Mongi Zekri Ph.d UF/IFAS 5-County Agent
- In areas with high temperature and high rainfall the disease cycle continues year round and infection may occur at any time.
- http://idtools.org/id/citrus/diseases/factsheet.php?name=Greasy+spot
Citrus Greasy Spot Disease on Fruit
Greasy spot rind blotch on grapefruit.
http://edis.ifas.ufl.edu/ch015
Close-up of rind blotch on grapefruit.
http://edis.ifas.ufl.edu/ch015
Individual rind blotch lesions between oil glands on grapefruit.
http://edis.ifas.ufl.edu/ch015
Citrus Greasy Spot on Leaves
Greasy spot symptoms on grapefruit leaves.
http://edis.ifas.ufl.edu/ch015
Greasy spot symptoms on the upper and lower leaf surfaces.
http://edis.ifas.ufl.edu/ch015
Resources
http://edis.ifas.ufl.edu/hs263
http://edis.ifas.ufl.edu/hs141
http://idtools.org/id/citrus/diseases/factsheet.php?name=Greasy+spot
http://edis.ifas.ufl.edu/ch015
