Phyllosticta causes circular leaf spots with brown/reddish borders. The spots can be really large covering a large area of the leaf.
Initial symptoms include small watersoaked regions on the leaves.
lesions become more apparent with a ring-like pattern at alter stages.
Fungal fruiting bodies (pycnidia) can be produced in these spots (not shown).
A varying symptom on the leaf.
Symptoms on the margin of the midrib.
Pycnidia are light to dark brown in color and is partially embedded in the plant tissue.
Spores are extruded through an opening (ostiole) at the top of the pycnidium. Spores form tendrils as they are compressed and extruded through the pycnidia’s ostiole.