| phytophthora kernoviae sp. nov., an invasive pathogen causing bleeding stem lesions on forest trees and foliar necrosis of ornamentals in the uk. | a new phytophthora pathogen of trees and shrubs, previously informally designated phytophthora taxon c, is formally named here as p. kernoviae. p. kernoviae was discovered in late 2003 during surveys of woodlands in cornwall, south-west england, for the presence of another invasive pathogen, p. ramorum. p. kernoviae is self-fertile (homothallic), having plerotic oogonia, often with distinctly tapered stalks and amphigynous antheridia. it produces papillate sporangia, sometimes markedly asymmetri ... | 2005 | 16175787 |