{"id":790,"date":"2024-08-02T20:23:55","date_gmt":"2024-08-02T20:23:55","guid":{"rendered":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/?p=790"},"modified":"2024-08-02T20:23:55","modified_gmt":"2024-08-02T20:23:55","slug":"oregon-myrtle-defoliation","status":"publish","type":"post","link":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/2024\/08\/02\/oregon-myrtle-defoliation\/","title":{"rendered":"Oregon-Myrtle Defoliation"},"content":{"rendered":"
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Myrtle with defoliation. Photo by Norma Kline @OSU<\/figcaption><\/figure>\n<\/div>\n\n\n

Myrtle defoliation caused by a plant pathogen, Calonectria californiensis, <\/em>has been observed in Coos and Curry Counties. Defoliation starts at the bottom of the tree and proceeds upward. Defoliation can be significant, affecting 80% of the tree.<\/p>\n\n\n\n

Leaf symptoms include tan colored spots and blotches surrounded by dark brown margins. Once infested, the leaves can drop off the tree quickly.<\/p>\n\n\n\n

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Leaf symptoms of Calonectria californiensis,<\/em> Photo by Norma Kline@OSU<\/figcaption><\/figure>\n\n\n\n

Many Oregon-myrtle trees affected by the pathogen appear to have new foliage growth which is very promising. We are in the process of developing a data sheet where interested landowners can help us monitor the health and environmental settings of their myrtles. At this point, unless a tree poses a particular hazard, we suggest that landowners take a wait-and-see approach to tree health recovery. Once we gather sufficient information, we plan to develop a fact sheet.\u00a0Calonectria californiensis<\/em> may also affect other native trees and shrubs such as salal, mock orange, Oregon grape, native rhododendrons and tanoak.\u00a0 Calonectria<\/em> IS NOT <\/strong>the same pathogen that causes Sudden Oak Death in Curry County.<\/p>\n\n\n

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Small greenish fruit of Oregon-myrtle. Photo:Patrick Breen@OSU<\/figcaption><\/figure>\n<\/div>\n\n\n

Oregon-myrtle identification.<\/strong> Oregon-myrtle (Umbellularia californica<\/em>) goes by several common names: Oregon-myrtle, bay laurel, California-laurel, California bay, pepperwood. They are all the same tree! Oregon-myrtle is a broadleaf evergreen tree with highly aromatic thick and leathery leaves.\u00a0The small, greenish fruit are less than 1 inch long.<\/p>\n\n\n

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Healthy leaves of Oregon-myrtle. Photo: Patrick Breen @OSU<\/figcaption><\/figure>\n<\/div>\n\n\n

Are you interested in participating in the Oregon-myrtle monitoring project<\/strong>? Contact Norma Kline, OSU Extension Forester for Coos and Curry Counties. Norma.Kline@Oregonstate.edu<\/p>\n","protected":false},"excerpt":{"rendered":"

Myrtle defoliation caused by a plant pathogen, Calonectria californiensis, has been observed in Coos and Curry Counties. Defoliation starts at the bottom of the tree and proceeds upward. Defoliation can be significant, affecting 80% of the tree. Leaf symptoms include … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":10521,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-790","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/posts\/790","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/users\/10521"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/comments?post=790"}],"version-history":[{"count":1,"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/posts\/790\/revisions"}],"predecessor-version":[{"id":795,"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/posts\/790\/revisions\/795"}],"wp:attachment":[{"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/media?parent=790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/categories?post=790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/southcoastfieldforest\/wp-json\/wp\/v2\/tags?post=790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}