Black walnuts are supposed to be classic cases on allelopathy. Yet there is nothing in these “Caddo” black walnuts that really says “allelopathy” very strongly. Many trees had close neighbours, and several of them had Virginia Creeper growing on them. Not exactly what I would expect of an allelopathic tree. I need to find out more about what’s going on.
Posted on June 4, 2007 by Ian Ramjohn