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| Hedgehog Galls on While Oak (Photos by Peggy Sellers) |
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These cool looking structures are galls that appear on white oaks as spheres that are covered with spines. Inside small cynipid wasps are developing. The galls can range from 1/4 to 1/2 inch in diameter and are often a yellow to red color. These galls, like many other galls on leaves of oaks, they cause no significant harm to the tree. Therefore, no controls are recommended.
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Last updated: 3 August 2001/tlm.
The Plant & Pest Diagnostic Laboratory at Purdue University.