Oak tree shooting acorns

The oak is shooting these deformed acorns. What is the cause and what can be done? Thanks

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1 Comment To "Oak tree shooting acorns"

#1 Comment By nikki-phipps On 08/01/2017 @ 2:06 pm

This sounds like knopper gall which is due to a wasp. Generally, insect galls will not harm the tree, though the affected acorns will not germinate – but unless you’re growing these this shouldn’t be much of an issue.

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