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Comparative Host Susceptibility and Sporulation Potential of Phytophthora ramorum on Species, Cultivars, and Hybrids of Camellia

R. G. Linderman and E. A. Davis

August 2007


Phytophthora ramorum, causal agent of ramorum blight of woody shrub species, has caused serious damage to cultivars and species of camellia in commercial nurseries. Reports of relative susceptibility of camellia to P. ramorum have indicated a range from high to low susceptibility, both in nurseries and under experimental conditions. The authors inoculated a series of cultivars of camellia to determine their relative susceptibility to infection, and then compared lesion size to the capacity of the pathogen to produce sporangia on the lesions.


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