First Report of <i>Phytophthora cambivora</i> on Hybrid Rhododendron in North Carolina

Fig. 1. Bullate oogonium of Phytophthora cambivora. Note the elongated oogonium stalk with subtending bicellular amphigynous antheridium and the plerotic oospore. Bar is 40 micrometers.



Image from Plant Health Progress article:
First Report of Phytophthora cambivora on Hybrid Rhododendron in North Carolina