Honeylocust Knots

Last week, while photographing calico scale (Eulecanium cerasorum) on honeylocusts (Gleditsia triacanthos) in a commercial landscape (see BYGYL Alert, "Calico Scale is Puffing-Up and Pumping Honeydew," April 19, 2017), I came across two trees with numerous knot-like growths on the stems.  I'm pretty certain the soft scale had nothing to do with growths for two reasons:  the knotty trees were two of the least infested honeylocusts and we've seen these growths before on trees without calico scale.


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Ron Wilson

Ron Wilson

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