{"id":2868,"date":"2015-07-15T14:45:05","date_gmt":"2015-07-15T21:45:05","guid":{"rendered":"http:\/\/ppo.puyallup.wsu.edu\/sod\/?page_id=2868"},"modified":"2015-07-15T14:51:00","modified_gmt":"2015-07-15T21:51:00","slug":"prd","status":"publish","type":"page","link":"https:\/\/ppo.puyallup.wsu.edu\/sod\/education\/mginfo\/pr-symptoms\/prd\/","title":{"rendered":"Phytophthora root disease and canker"},"content":{"rendered":"
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Phytophthora root disease and canker<\/h2>\n<\/header>\n

Root disease and cankering are caused by several species of Phytophthora<\/em>: Phytophthora cinnamomi, P. cactorum, P. cambivora, P. citricola, P. cryptogea, P. drechsleri, P. megasperma, <\/em>and P. syringae. Phytophthora <\/em>root disease is characterized by general decline, twig and branch dieback, small, yellow and sparse foliage, premature leaf-drop, and lesions on the lower trunk and root crown. Typically there is bleeding or oozing through bark cracks near the root-crown, often appearing as black to rusty streaking. Wood and inner bark appear discolored on recently dead material. Frequent irrigation, poor drainage and poor soil aeration favor this pest. This is a common problem on shade and orchard trees.<\/p>\n

Although P. ramorum<\/em> has not yet been found to cause root rot and cankering of the root crown, a sample should be collected if the tree is an oak or other known stem canker host of P. ramorum<\/em>.<\/p>\n

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P. cinnamomi root disease on chestnut (Castanea) seedlings. This disease is a problem in warm soils, such as in this greenhouse.<\/figcaption><\/figure>\n

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\"Root<\/a>
Root disease symptoms consist of wilting, yellowing foliage.<\/figcaption><\/figure>\n
\"Phytophthora<\/a>
Phytophthora root disease and canker on alder. The infection spread from the roots to the main stem of the tree.<\/figcaption><\/figure>\n

Back to symptom ID guide<\/a><\/p>\n<\/p><\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"

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Phytophthora root disease and canker<\/h2>\n

Root disease and cankering are caused by several species of Phytophthora<\/em>: Phytophthora cinnamomi, P. cactorum, P. cambivora, P. citricola, P. cryptogea, P. drechsleri, … » More …<\/span><\/a><\/em><\/p>\n","protected":false},"author":1130,"featured_media":0,"parent":1956,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"template-builder.php","meta":[],"wsuwp_university_location":[],"wsuwp_university_org":[],"_links":{"self":[{"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/pages\/2868"}],"collection":[{"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/users\/1130"}],"replies":[{"embeddable":true,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/comments?post=2868"}],"version-history":[{"count":4,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/pages\/2868\/revisions"}],"predecessor-version":[{"id":2876,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/pages\/2868\/revisions\/2876"}],"up":[{"embeddable":true,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/pages\/1956"}],"wp:attachment":[{"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/media?parent=2868"}],"wp:term":[{"taxonomy":"wsuwp_university_location","embeddable":true,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/wsuwp_university_location?post=2868"},{"taxonomy":"wsuwp_university_org","embeddable":true,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/wsuwp_university_org?post=2868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}