See:
Tanoak (Notholithocarpus densiflorus) - Sudden Oak Death
Rhododendron - Ramorum Leaf Blight and Shoot Dieback
Symptoms Foliar symptoms consisted of dark-brown lesions near wounds or around leaf margins where water collected. Shot-hole symptoms characterized by abscission zones and dropping of infected tissues were also observed. Lesions expanded beyond the margin of the shot-hole in some cases.
Reference Elliott, M., Rollins, L., Bourret, T., and Chastagner, G. 2020. First report of leaf blight caused by Phytophthora ramorum on cherry laurel (Prunus laurocerasus) in Washington State, USA. Plant Disease https://doi.org/10.1094/PDIS-07-20-1489-PDN