Definition
A leaf spot is a plant disease lesion on plant leaves, spots typically are restricted in development in the leaf after reaching a characteristic size, but under some conditions may coalesce into larger necrotic areas.
Leaf spots on guava (Psidium guajava) foliage. |
 Cercospora leaf spot and blight of celery (Apium graveolens) , caused by the fungal plant pathogen, Cercspora apii. |
 Cercospora leaf spot of coffee (Coffea arabica), caused by the plant-pathogenic fungus, Cercospora coffeicola. |