Every year my Bur Oak gets it's leaves ate up by something. This year I plan to find the problem & fix it. But research as left me at a loss. So today I took some photos so as I can post on this forum to ask for a solution. I only have this one Bur Oak that I planted about 10 or so years ago. I have looked for any insects but found none, but I did find a few tiny black things that look like poop droppings stuck to the top of the leaves. Please help.