Sudden oak death has led to entire woodlands in
Devon and Cornwall being chopped down to try to contain the disease, but
now it's hit Somerset too.
The disease is spread by the wind and can affect different tree species.
There's no known cure for sudden oak death, which has also killed millions of trees in America.
It's thought the disease has come from America, but now landowners in the UK are being asked to contact the Forestry Commission if they think one of their trees might be infected.
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