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Hedgehog Galls

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Peggy Sellers, Master Gardener State Coordinator, Purdue University

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.

(Click on smaller image to view larger image.)

Hedgehog Gall on White Oak Hedgehog Gall with Penny
Hedgehog Galls on While Oak
(Photos by Peggy Sellers)

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Plant and Pest Digital Library and Digitally Assisted Diagnosis, Purdue University, West Lafayette, Indiana.

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