Category Soilborne Diseases Subject Avocado Root Rot (Phytophthora cinnamomi) Title Phytophthora cinnamomi (avocado root rot) replant trial Description Avocado replant trial with potential resistant rootstock material. Left to right; ‘Hass’ tree on Duke 7, G755, Thomas and Toro Canyon rootstock. This trial was a landmark demonstration of the potential for resistant rootstocks to control avocado root rot. Embacadero Ranch, Goleta, CA. Location Goleta, CA Date July, 1985 Source George E. Goodall Larger Picture 1000 x 673 (87 kb)