Tar spots (Rhytisma acerinumon) on sycamore leaves

Tar spots (Rhytisma acerinumon) on sycamore leaves

Observation - Tar spots (Rhytisma acerinumon) on sycamore leaves - UK and Ireland. Description: We found lots of sycamore trees with this fungal infection.

We found lots of sycamore trees with this fungal infection.