<i>Phytophthora ramorum</i> Infects Hazelnut, Vine Maple, Blue Blossom, and Manzanita Species in California

Fig. 1. Phytophthora ramorum blight symptoms on California hazelnut, Corylus cornuta var. californica, from natural infection (A, shown here) and laboratory detached shoot inoculation (B).



Image from Plant Health Progress article:
Phytophthora ramorum Infects Hazelnut, Vine Maple, Blue Blossom, and Manzanita Species in California