Tree health hunt in the Howardian Hills

By Dr Charles Lane
Consultant plant pathologist, Food and Environment Research Agency, York

I recently took a great walk on a lovely sunny evening in the Howardian hills in North Yorkshire with fabulous views over Castle Howard estate, an area of dense mixed woodland with a predominance of Ash but also Horse Chestnut and Oak.


Oak marbles

On a walk round the old Upton Colliery site near Wakefield last week we saw a little oak tree covered in masses of oak marbles, a type of gall. I'd never seen a tree with so many on it before, so I thought I'd share this photo with you....Oak Marbles


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