Leaf Spot
/LEEF SPOT/🦠 Diseases● Basic
Also known as: foliar spot
Circular or irregular spots on leaves caused by various fungal (Cercospora, Septoria, Alternaria) or bacterial (Xanthomonas, Pseudomonas) pathogens. Spots may be tan, brown, black, or purple, often with concentric rings or yellow halos. While rarely fatal, severe infections cause premature defoliation and reduce vigor.
Etymology
English leaf + spot
Example
“Rake and destroy fallen leaves to reduce the inoculum of leaf spot fungi overwintering in debris.”