Common Symptoms
Brown leaf spots
Circular or irregular brown spots appear on leaf surfaces, sometimes surrounded by a yellow halo.
Signs to check
- Spots measure from 2 mm (about 0.08 in) to more than 2 cm (about 0.8 in), with a circular or irregular shape.
- Color ranges from light brown to black, sometimes with a drier, grayish center.
- A distinct yellow halo may surround the spot's edge, separating it from green tissue.
- Spots may be isolated or merge into large areas of dead tissue.
- The spot feels dry and papery, never powdery or sticky.
Common causes
- Anthracnose · Brown or black spots, often sunken and surrounded by a halo.
- Weather damage · Sudden damage after extreme weather such as frost, a heatwave or wind.