Vaccinium Clones Resistant to Phytophthora cinnamomi1

Abstract Two clones of Vaccinium showed high field-resistance to Phytophthora cinnamomi and remained unaffected during 3 years of observation in naturally infested soil: Me-US 32, a productive, cultivated highbush selection ( V. australe ), and a selection from the wild of the diploid species ( V. atrococcum ). However, the clone, E-22 selection of V. australe , growing in adjacent row to the resistant clones was severely damaged by the pathogen. Phytophthora cinnamomi was readily isolated from soil surrounding both resistant and susceptible clones.