I have 2 flowering crabapple trees that are 5 years old. The have grown well and flowered. Last year we started to get red spots on the leaves. This year they are much worse, and the leaves are falling off. Now I find that the 3 maples that I planted, which are of different ages and have also done well, are starting to get the same spots on the leaves. A cleveland pear, too. Can you help with this? Thanks, Gary
It sounds like Entomosporium Leaf Spot but, without seeing it is just an educated guess. Here’s a link that might help you make a better diagnosis
Assuming that that it is Entomosporium Leaf Spot, you’ll want to spray with a copper based fungicide (we stock it at Hewitt’s) preventatively in spring. A thorough clean up oand removal of the leaves as they fall and at the end of the season can slow the spread of the disease as well.