White oak leaves and marble-sized galls. Galls are growths on plants caused by invasions of parasites, viruses, fungi and bacteria -- making galls centers of activity for both attacks on a plant's ...

Q: A squirrel must have planted a bur oak acorn in one of ... suck fluids from them. The plants become stunted and unproductive, and you can usually see knotty galls on their roots.

If you plan to plant a tree this year, why not consider an oak? “An oak is the best tree to choose because it is the No. 1 plant for supporting the food web, ” says University of Delaware entomologist ...