River Birch leaves eaten
My River Birch trees have been partially defoliated this year. The leaves show holes in the middle and are chewed along the edges. I cannot find the actual insect or caterpillars on the leaves, but have seen some white spots on some leaves and did see a few ladybugs. I have lost one trunk on one of three trees. Is there a way to treat it so I don’t lose more?
Kent County Michigan
You could apply an insecticide in the evening so you are less likely to affect any bees. These are tall trees so you may want to consult a certified arborist. You can find one in your area by searching on the site treesaregood.com. You also may want to see if there, are Japanese beetles around your trees.