The leaves on my Oak tree are full of holes. What cause this and how do i fix it.?
Answers: You've probably got caterpillars of some sort. Possibly gypsy moths. Check the leaves closely, they're really tiny at first. About the with the sole purpose way I know to return with rid of them is by spraying. You can rent a fogger or ever buy one and then spray the tree beside an insecticide, but be careful and follow the directions as far as wearing protective gear and exposure to pets and children.
You may basically have to adopt that this year is the year your oak leaves get eat. It's just your turn to enjoy an infestation. It's impractical to spray, unless it's a small tree or costly specimen. Insect pests tend to go contained by cycles and this year it's probably just a fruitless year for that particular bug. You'll probably own no problems next year.