01195nas a2200121 4500008004100000245006500041210005900106260006300165520070800228100002200936700002300958856009200981 2019 eng d00aSudden oak death, sudden larch death, and ramorum blight​ 0 aSudden oak death sudden larch death and ramorum blight aSt. Paul, MNbThe American Phytopathological Societyc20193 a

Phytophthora ramorum is a recently emerged pathogen with a host range of more than 150 plant species. This fungus-like organism causes sudden oak death on certain members of the oak family and has killed an estimated 30-45 million trees in coastal forests of California and Oregon. The pathogen additionally causes sudden larch death of Japanese larch, especially in conifer plantations in the United Kingdom. On most hosts, however, P. ramorum causes ramorum leaf blight or shoot blight on native plant species and horticultural nursery crops, plaguing some nurseries in California, Oregon, Washington, British Columbia and Europe. 

1 aPeterson, Ebba, K1 aParke, Jennifer, L uhttps://www.apsnet.org/edcenter/disandpath/oomycete/pdlessons/Pages/SuddenOakDeath.aspx