Bunching Disease in Nut Trees #385767 - Ask Extension


Bunching Disease in Nut Trees #385767

Asked February 20, 2017, 7:41 AM EST

What causes Bunching Disease & how do you treat an affected tree?

Baltimore County Maryland

Expert Response

Bunching disease is caused by a mycoplasm-like organism, but it spreads from tree to tree probably by vector insects. Bunching is another term for "witches broom" or "brooming."  We do not have a lot of information about this disease.  Our sources recommend removing an infected tree or pruning out affected parts well below the symptoms, in order to prevent spread to other trees. Destroy infected parts. 

Are there growing conditions that encourage this infestation?  Are there any suggestions to prevent continued infestation and loss of the entire nut grove?
The Question Asker Replied February 21, 2017, 7:17 AM EST
Nut trees in general are not well adapted here. They may grow but may not produce nuts reliably.  We do not have the information and research that you are looking for.

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