Citrus Black Spot
Phyllosticta citricarpa
highCitrusfungal
A fungal disease of quarantine significance that blemishes fruit rind with hard, gray-centered spots.
Symptoms
Hard brown spots with gray centers ("freckle spot"), plus cracked-spot and virulent-spot forms on the fruit rind that reduce marketability.
Favorable conditions
- •Warm, wet weather during fruit development
- •Fallen leaf litter serving as the main spore source
Management
- 1Apply a protectant fungicide program timed to fruit development
- 2Remove and manage fallen leaf litter
- 3Plant less-susceptible varieties
- 4Follow quarantine/regulatory guidance where the disease is regulated
Back to the disease library