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. The pathogen was also noted on Drimys winteri, Gevuina avellana, Ilex aquifolium, Quercus ilex, Vaccinium myrtillus, Hedera helix, Podocarpus salignas.
From the article Phytophthora kernoviae on Wikipedia (CC BY-SA), quoted section by section
What it does
Phytophthora kernoviae can survive as an oospore, a thick walled resting structure and has been found to survive on infected plant tissues and in soil. Chlamydospores, long term resting structures that are seen in Phytophthora ramorum and other Phytophthora species are not observed in Phytophthora kernoviae. Production of sporangia, oospores, and zoospores were observed on Phytophthora kernoviae. Sporangia are only formed on hosts with susceptible foliage, trunk cankers have not exhibited sporulation and do not spread disease. This creates a simple life cycle for Phytophthora kernoviae. Oospores can germinate and create mouse-shaped sporangia. Sporangia serve as dispersal structures and create and release Zoospores, motile infectious spores. Once released, oospores germinate on the host and infect target host tissues. After infection if the conditions are correct, Phytophthora kernoviae produce sporangia that are dislodged by natural occurrences and spread to nearby plant tissue. In lab settings the production of these sporangia are documented within one week, with the sproangia present six days after inoculation causing documented disease in new plant tissues. …
Wikipedia: “Life cycle”
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
Searching the stacks…
Every page naming Phytophthora kernoviae in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 789386.