<i>Phytophthora citricola</i> Causes a Stem Canker in Black Walnut (<i>Juglans nigra</i>)

Fig. 6. Three months after inoculation, P. citricola inoculated black walnuts continued to decline, finally dying back to the root graft.



Image from Plant Health Progress article:
Phytophthora citricola Causes a Stem Canker in Black Walnut (Juglans nigra)