See:
Rhododendron - Phytophthora Root Rot
Note: Phytophthora spp. have been identified on rose samples with root rot from the PNW several times by the OSU Plant Clinic.
Phytophthora was found on necrotic roots.
OSU Plant Clinic Collection, 2013.
See:
Rhododendron - Phytophthora Root Rot
Note: Phytophthora spp. have been identified on rose samples with root rot from the PNW several times by the OSU Plant Clinic.