not an apple nor an egg. Galls are abnormal outgrowths of plant tissues caused by various parasites, from fungi and bacteria to insects and mites. In the case of oak apple galls, they are primarily induced by the larvae of tiny wasps from the Cynipidae family. These galls can vary in size, typically ranging from 2 to 4 inches in diameter, and are lightweight due to their hollow interior.
Oak apple galls are named for their superficial resemblance to apples. However, they are much lighter and have a distinct papery texture. The gall forms as the tree’s response to the wasp’s egg-laying process, creating a protective structure for the developing larvae inside. While they may seem out of place in your yard, these structures are a natural part of the lifecycle of certain oak trees and their insect inhabitants.
2. How Oak Apple Galls Form on Your Trees
Oak apple
