{"id":2860,"date":"2015-07-15T14:21:48","date_gmt":"2015-07-15T21:21:48","guid":{"rendered":"http:\/\/ppo.puyallup.wsu.edu\/sod\/?page_id=2860"},"modified":"2015-07-15T14:31:49","modified_gmt":"2015-07-15T21:31:49","slug":"bleeding-stem-cankers","status":"publish","type":"page","link":"https:\/\/ppo.puyallup.wsu.edu\/sod\/education\/mginfo\/pr-symptoms\/bleeding-stem-cankers\/","title":{"rendered":"Bleeding stem cankers"},"content":{"rendered":"
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Bleeding stem cankers<\/h2>\n<\/header>\n

Phytophthora<\/em> species, including P. ramorum<\/em>, cause bleeding stem cankers of several tree hosts. These cankers interfere with water transport and may cause crown wilting or dieback. Symptoms of Phytophthora<\/em> cankers include bleeding of a reddish-brown to black gummy liquid from the lesion area and brown or pink staining of the inner bark and cambium with a defined margin. If a tree has these symptoms a sample should be collected and submitted for analysis to determine if the causal organism is P. ramorum<\/em> or some other Phytophthora<\/em> species.<\/p>\n

In Washington State, P. cactorum<\/em> has been reported to cause bleeding stem cankers on dogwood (Cornus nuttallii<\/em>) and Pacific madrone (Arbutus menziesii<\/em>). P. ramorum<\/em> has not been found to cause bleeding stem cankers on these hosts.<\/p>\n

Some tree species that are susceptible to bleeding cankers by Phytophthora<\/em> spp. are listed below. Of the Phytophthor<\/em>a species listed, P. alni<\/em> and P. kernoviae<\/em> have not been reported on hosts in the US.<\/p>\n