Question
I have what I believe is a large white oak in my front yard,with several others in the back yard. Some of them are not only starting to lose leaves, drop acorns, but they are also dropping small whit/tannish with red trim seed looking pods all over the place. The small pods are growing on the bottom of the leaves. Can you help me identify the pod and help to get rid of them?

Answer
This sounds like a leaf gall insect. These insects will secrete a chemical on the leaf and lay eggs and the chemical will cause the leaf cells to grow over the eggs forming a gall. When the eggs hatch the gall will fall off. These gall insects cause very little damage as far as the health of the tree goes. They may cause the leaves to fall a little sooner than normal. I would not worry with them the population will vary greatly from year to year and next year you may not see any galls. There is not practical control measures and really none is needed.