Ash Tree Yellowing #589186 - Ask Extension


Ash Tree Yellowing #589186

Asked August 14, 2019, 7:42 PM EDT

This green ash has lost all it’s leafs and has witches broom type gree bud looking things all over the tree. The branches are pliable and it’s mid August. What is the recommended treatment options so that this tree doesn’t die?

Natrona County Wyoming

Expert Response

This looks consistent with Ash yellows disease. It is a phytoplasma infection that causes a witches broom growth of all of the foliage. There are a few insects that are vectors of the disease from one plant to another. There is no know cure or treatment for the disease and tree removal is recommended.

It can also be vectored to lilac, so planting other species of plants back into the area would be advisable.

Donna Hoffman Replied August 19, 2019, 5:34 PM EDT

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