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What are these balls on my oak leaves?
Peanuts3
Posts: 759
I have found some oak leaves that have fallen off and they have these things on them.
Any idea what they are and are they damaging to the tree ?
0
Posts
They look like galls, possibly oak spangle gall.
They are caused by a wasp, they will not harm the tree.
http://www.bugsandweeds.co.uk/galls%20p1.html
There are some lovely galls on the link, you need to scroll down a bit for the oak ones
In the sticks near Peterborough