black knot on local Schubert Chokecherry Trees
As per my previous post regarding Black Knot on Schubert Chokecherry Trees (prunus), I have confirmed with a horticulturist that it is not necessary to wait until the trees are dormant to prune out the disease. Please, do it now. Cut at least 8 inches below visible signs of infection, disinfecting your tools between each cut. A 10% bleach or alcohol solution will kill traces of the disease.
For photos and more information on Black Knot see
http://shirley-agardenerslife.blogspot.com/search/label/black%20knot%20disease
If you see this in your municipality, feel free to contact the horticulture department so they may address the problem.
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