Knopper Gall Information – What Causes Deformed Acorns On Oak Trees

By January 9, 2018Articles

Knopper Gall Information – What Causes Deformed Acorns On Oak Trees

By Amy Grant My oak tree has ridged, knobby, sticky looking formations on the acorns. They’re pretty odd looking and make me wonder what’s wrong with my acorns. As with every earth shattering question, I went directly to the internet to find out why my acorns are deformed. After Googling ‘what causes deformed acorns on oak trees,’ I came across something about knopper galls on oak trees. After reading through the knopper gall information, I’m pretty sure I’ve found the culprit. Knopper Gall Information If you, too, have ever asked, “What’s wrong with my acorns,” then this is the most likely culprit. Knopper galls are caused by a Cynipid gall wasp, which is actually rarely seen. The wasp (Andricus quercuscalicis) lays eggs within the tree buds. Found on the pedunculate or common oak tree, these galls may be found on the foliage, twigs and acorns. The name ‘knopper galls’ is

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