Greasy Spot of Citrus
Zasmidium citri-griseum
Citrusfungal
A fungal leaf disease causing greasy-looking blister spots and premature leaf drop.
Symptoms
Greasy-looking, yellow-to-brown blister spots on the underside of leaves, leading to premature leaf drop in severe cases.
Favorable conditions
- •Warm, humid weather
- •Spores released from decomposing leaf litter on the grove floor
Management
- 1Apply fungicide sprays timed to summer spore release
- 2Improve grove sanitation and drainage to speed leaf-litter breakdown
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