Black Spots on Plum Leaves
I just planted a new plum tree this year and it did fairly well until last week when it has developed the odd black spots in the picture.
Do you know what it might be?
I sprayed with Bonide Fruit and Nut spray about two weeks to kill some slugs that had appeared on a neighboring apple tree.
I'm also watering three times a week as I've struggled with scorching on the young trees.