query: Is there treatment for phytophthora ramorum?
passage: Phytophthora ramorum
Early detection of P. ramorum is essential for its control. On an individual-tree basis, preventive treatments, which are more effective than therapeutic treatments,[39] depend on knowledge of the pathogen’s movement through the landscape to know when it is nearing prized trees. On the landscape level, P. ramorum’s fast and often undetectable movement means that any treatment hoping to slow its spread must happen very early in the development of an infestation. Since P. ramorum’s discovery, researchers have been working on the development of early detection methods on scales ranging from diagnosis in individual infected plants to landscape-level detection efforts involving large numbers of people.
passage: Phytophthora kernoviae
Phytophthora kernoviae is a plant pathogen that mainly infects European beech ("Fagus sylvatica") and "Rhododendron ponticum". It was first identified in 2003 in Cornwall, UK when scientists were surveying for the presence of "Phytophthora ramorum". This made it the third new "Phytophthora" species to be found in the UK in a decade. It was named "Phytophthora kernoviae", after the ancient name for Cornwall, Kernow. It causes large stem lesions on beech and necrosis of stems and leaves of "Rhododendron ponticum". It is self-fertile. It has also been isolated from "Quercus robur" and "Liriodendron tulipifera". The original paper describing the species, stated it can infect "Magnolia" and "Camellia" species, "Pieris formosa", "Gevuina avellana", "Michelia doltsopa" and "Quercus ilex". Since then many other plants have been identified as natural hosts of the pathogen. Molecular analysis has revealed that an infection on "Pinus radiata", recorded in New Zealand in 1950, was caused by "P. kernoviae".