{"id":2898,"date":"2015-07-21T11:07:21","date_gmt":"2015-07-21T18:07:21","guid":{"rendered":"http:\/\/ppo.puyallup.wsu.edu\/sod\/?page_id=2898"},"modified":"2019-08-22T09:41:55","modified_gmt":"2019-08-22T16:41:55","slug":"steam","status":"publish","type":"page","link":"https:\/\/ppo.puyallup.wsu.edu\/sod\/research-projects\/steam\/","title":{"rendered":"Steam treatment to sanitize soils, pots, and media"},"content":{"rendered":"<br \/>\n<section id=\"builder-section-1437501912956\" class=\"row single gutter pad-top\">\n<div style=\"\" class=\"column one \">\n<header>\n<h2>Steam treatment to sanitize soils, pots, and media<\/h2>\n<\/header>\n<p><em>Phytophthora<\/em> species, including <em>P. ramorum<\/em>, typically produce spores that allow them to survive in soil. Media in containerized nursery stock can become contaminated from infested soil or plant material, resulting in the spread of these pathogens. <em>Phythophthora<\/em> species are projected to be a continuing issue for the nursery industry through unknown introductions as a result of international plant trade.<\/p>\n<p>Steam treatment has been shown to be effective at removing inoculum of these pathogens from soil, pots, and media if the temperature is held at 50C (122 F) for at least 30 minutes.<\/p>\n<figure id=\"attachment_2903\" aria-describedby=\"caption-attachment-2903\" style=\"width: 396px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/wpcdn.web.wsu.edu\/wp-puyallup\/uploads\/sites\/687\/2015\/07\/temperatures.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-2903\" src=\"https:\/\/wpcdn.web.wsu.edu\/wp-puyallup\/uploads\/sites\/687\/2015\/07\/temperatures-396x265.jpg\" alt=\"Soil temperatures at 5, 15, and 30 cm during steaming in a sandy loam field soil. The steamer (Sioux SF20) was shut off at 3 PM when the soil at 30 cm reached 50\u00b0C. The soil cooled rapidly at 5 cm but held above 50\u00b0C at 30 cm for about 14 hrs. The steamer operated for a little less than 5 hrs.\" width=\"396\" height=\"265\" srcset=\"https:\/\/wpcdn.web.wsu.edu\/wp-puyallup\/uploads\/sites\/687\/2015\/07\/temperatures-396x265.jpg 396w, https:\/\/wpcdn.web.wsu.edu\/wp-puyallup\/uploads\/sites\/687\/2015\/07\/temperatures.jpg 624w\" sizes=\"(max-width: 396px) 100vw, 396px\" \/><\/a><figcaption id=\"caption-attachment-2903\" class=\"wp-caption-text\">Soil temperatures at 5, 15, and 30 cm during steaming in a sandy loam field soil. The steamer (Sioux SF20) was shut off at 3 PM when the soil at 30 cm reached 50\u00b0C. The soil cooled rapidly at 5 cm but held above 50\u00b0C at 30 cm for about 14 hrs. The steamer operated for a little less than 5 hrs.<\/figcaption><\/figure>\n<p><strong><a href=\"http:\/\/ppo.puyallup.wsu.edu\/sod\/research-projects\/steam\/steam-process\/\">How the process works<\/a><\/strong><\/p>\n<p><strong><a href=\"http:\/\/ppo.puyallup.wsu.edu\/sod\/research-projects\/steam\/steam-generators\/\">Steam generators<\/a><\/strong><\/p>\n<p><strong><a href=\"http:\/\/ppo.puyallup.wsu.edu\/sod\/research-projects\/steam\/effectiveness\/\">Effectiveness of steam treatment<\/a><\/strong><\/p>\n<p>Elliott, M. and Chastagner, G. 2019. <a href=\"https:\/\/ucanr.edu\/sites\/sod7\/files\/306550.pdf\">A Technique for Treating Contaminated Soil with Steam for Eradication of <em>Phytophthora<\/em><\/a>. Poster presented at the 7th Sudden Oak Death Science Symposium June 25-27 2019 San Francisco, CA.<\/p>\n<\/p><\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p> <\/p>\n<h2>Steam treatment to sanitize soils, pots, and media<\/h2>\n<p><em>Phytophthora<\/em> species, including <em>P. ramorum<\/em>, typically produce spores that allow them to survive in soil. Media in containerized nursery stock &#8230; <a href=\"https:\/\/ppo.puyallup.wsu.edu\/sod\/research-projects\/steam\/\" class=\"more-link\"><span class=\"more-default\">&raquo; More &#8230;<\/span><\/a><\/p>\n","protected":false},"author":1130,"featured_media":0,"parent":1094,"menu_order":1,"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\/2898"}],"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=2898"}],"version-history":[{"count":9,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/pages\/2898\/revisions"}],"predecessor-version":[{"id":3217,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/pages\/2898\/revisions\/3217"}],"up":[{"embeddable":true,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/pages\/1094"}],"wp:attachment":[{"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/media?parent=2898"}],"wp:term":[{"taxonomy":"wsuwp_university_location","embeddable":true,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/wsuwp_university_location?post=2898"},{"taxonomy":"wsuwp_university_org","embeddable":true,"href":"https:\/\/ppo.puyallup.wsu.edu\/sod\/wp-json\/wp\/v2\/wsuwp_university_org?post=2898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}