Osteospermum (African daisy) – Leaf Damage
Q: I planted this flower a few weeks ago. Something seems to be eating it.
A: Osteospermum (African daisy) is very attractive and has few insect enemies.
This looks like moderate feeding damage caused by a leaf-footed bug or a stinkbug. The insect inserts its feeding tube into a leaf to suck out the sap.
Other than the damage being unsightly, I don’t think it poses a threat.
Use any garden insecticide (click for sources) for control.