black knot

Asked March 28, 2016, 12:17 PM EDT

What species of trees does black knot affect in our state? I realize it is a very serious problem. How can one diagnose it ....

Stearns County Minnesota

1 Response

It is a problem for Prunus or the plums. It is pretty easy to see. It looks like a black thickened area on branches. Here is a link that has very good info about it.