{"id":9394,"date":"2014-02-04T15:40:21","date_gmt":"2014-02-04T20:40:21","guid":{"rendered":"https:\/\/extension.umaine.edu\/blueberries\/?page_id=9394"},"modified":"2021-01-12T11:02:42","modified_gmt":"2021-01-12T16:02:42","slug":"purple-loosestrife","status":"publish","type":"page","link":"https:\/\/extension.umaine.edu\/blueberries\/weed-images\/herbaceous-broadleaf-weeds\/bluepurple-flowers\/purple-loosestrife\/","title":{"rendered":"Purple loosestrife"},"content":{"rendered":"<p><em>Prepared by Jennifer L. D&#8217;Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated April 2019.<\/em><\/p>\n<p><strong>Scientific name:<\/strong> <em>Lythrum salicaria<\/em> L.<\/p>\n<p><strong>Common name(s):<\/strong> purple loosestrife<\/p>\n<p><strong>Links:<\/strong> <a href=\"http:\/\/plants.usda.gov\/core\/profile?symbol=LYSA2\" target=\"_blank\" rel=\"noopener noreferrer\">USDA PLANTS Profile<\/a>, <a href=\"https:\/\/gobotany.nativeplanttrust.org\/species\/lythrum\/salicaria\/\" target=\"_blank\" rel=\"noopener noreferrer\">Go Botany<\/a><\/p>\n<p><em><strong>Images:<\/strong> (to see enlargements [PC]: click on image, then right click and choose &#8220;view image&#8221;)<\/em><\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-9394 gallery-columns-4 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-1.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lythrum salicaria late July\" aria-describedby=\"gallery-1-9395\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-1-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-1-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-9395'>\n\t\t\t\tflowering, late July\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-003.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-003-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lythrum salicaria flowers\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-003-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-003-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-006.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-006-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lythrum salicaria in blueberry field\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-006-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-006-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-002.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-002-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lythrum salicaria flower spike close up\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-002-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-002-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-003.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-003-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"purple loosestrife flower spike\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-003-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-003-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-005.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-005-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lythrum salicaria lower leaves\" aria-describedby=\"gallery-1-9399\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-005-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-005-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-9399'>\n\t\t\t\tlower leaves\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-004.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-004-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lythrum salicaria upper leaves\" aria-describedby=\"gallery-1-9398\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-004-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-004-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-9398'>\n\t\t\t\tupper leaves\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-007.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-007-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Lythrum salicaria flower detail\" aria-describedby=\"gallery-1-9401\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-007-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2014\/02\/Lythrum-salicaria-007-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-9401'>\n\t\t\t\tflower has 6 petals\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-004.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-004-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"purple loosestrife, large plants\" aria-describedby=\"gallery-1-16729\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-004-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-004-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-16729'>\n\t\t\t\trobust individuals in wet swale in blueberry field\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-007.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-007-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Purple loosestrife\" aria-describedby=\"gallery-1-16724\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-007-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-007-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-16724'>\n\t\t\t\tspreading from wet swale\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-005-e1575318904292.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-005-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Purple loosestrife colony\" aria-describedby=\"gallery-1-16725\" srcset=\"https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-005-150x150.jpg 150w, https:\/\/extension.umaine.edu\/blueberries\/wp-content\/uploads\/sites\/41\/2019\/04\/Lythrum-salicaria18-005-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-16725'>\n\t\t\t\tspreading from wet area to dry sandy area\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<p><strong>Description:<\/strong><\/p>\n<p>-perennial<\/p>\n<p>-considered an invasive species<\/p>\n<p>-leaves are:<\/p>\n<ul>\n<li>simple<\/li>\n<li>opposite<\/li>\n<li>whorled<\/li>\n<\/ul>\n<p><strong>Habitats:<\/strong><\/p>\n<p>-sun<\/p>\n<p>-wetlands<\/p>\n<p>-disturbed areas<\/p>\n<p>-meadows and fields<\/p>\n<p>-marshes<\/p>\n<p>-shores of rivers<\/p>\n<p><strong>Agriculture:<\/strong><\/p>\n<p>-displaces native plants<\/p>\n<p>-decreases plant and animal diversity<\/p>\n<ul>\n<li>competition with purple loosestrife has been suggested as a contributing factor in the decline of the rare Long&#8217;s bulrush (<i>Scirpus longii<\/i>) in Massachusetts<\/li>\n<\/ul>\n<p>&#8211; will hybridize with European wand loosestrife (<i>Lythrum virgatum<\/i>) and winged loosestrife (<i>Lythrum alatum<\/i>)<\/p>\n<p>-grazed by white tailed deer, muskrat, and rabbits<\/p>\n<p>-American coot, pied-billed grebe, black-crowned night heron, American goldfinch and gray catbird have all been observed nesting in purple loosestrife stands<\/p>\n<p>-provides little to no food source for birds<\/p>\n<p>-colonization can substantially reduce or eliminate open water in small marsh areas<\/p>\n<p>&#8211; Important aquatic food plants for wildlife such as pondweeds (<i>Potamogeton<\/i> spp.) are inhibited under the shade of purple loosestrife<\/p>\n<p>-Invading purple loosestrife in coastal British Columbia&#8217;s Fraser River estuary may have negative effects on detrital food chains<\/p>\n<p><strong>Management:<\/strong><\/p>\n<p>-eliminate small recent patches first with digging or hand pulling<\/p>\n<p>-encourage establishment of native woody cover to create shade<\/p>\n<p>-avoid disturbance<\/p>\n<p>-high water conditions slow its growth<\/p>\n<p>-cutting stems or removing flower heads<\/p>\n<p>-beetles and weevils have been released to control purple loosestrife<\/p>\n<p>-herbicides that have been used effectively against purple loosestrife in North America<\/p>\n<ul>\n<li>2, 4-D\n<ul>\n<li>Mixed results against purple loosestrife; harmful to dicots, but little impact on neighboring monocots<\/li>\n<\/ul>\n<\/li>\n<li>Triclopyr\n<ul>\n<li>Generally effective at killing purple loosestrife; results are variable with spray volume; selective against dicots<\/li>\n<\/ul>\n<\/li>\n<li>Glyphosate\n<ul>\n<li>Highly effective against purple loosestrife; specific formulations available for use in aquatic environments; also damages or kills most other plants which it contacts<\/li>\n<\/ul>\n<\/li>\n<li>Imazapyr\n<ul>\n<li>Effective against purple loosestrife; negatively impacts cattail<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>Natural History:<\/strong><\/p>\n<p>-native to Eurasia<\/p>\n<p>-it was well established by the 1830s within coastal wetlands along the New England seaboard,<\/p>\n<ul>\n<li>introduced via ship ballast soil.<\/li>\n<li>Initial spread of purple loosestrife into the interior of eastern North America occurred primarily via routes of maritime commerce, such as canals, rivers and the Great Lakes<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Sources:<\/p>\n<p>U.S. Forest Service. \u201cLythrum Salicaria.\u201d <i>Fire Effects Information System (FEIS)<\/i>, USDA, 2020, www.fs.fed.us\/database\/feis\/plants\/forb\/lytsal\/all.html.<\/p>\n<p>Go Botany. \u201cLythrum Salicaria L.\u201d <i>Lythrum Salicaria (Purple Loosestrife): Go Botany<\/i>, 2020, gobotany.nativeplanttrust.org\/species\/lythrum\/salicaria\/.<\/p>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Prepared by Jennifer L. D&#8217;Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated April 2019. Scientific name: Lythrum salicaria L. Common name(s): purple loosestrife Links: USDA PLANTS Profile, Go Botany Images: (to see enlargements [PC]: click on image, then right click and choose &#8220;view image&#8221;) Description: -perennial -considered an invasive species -leaves are: simple [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":6020,"menu_order":15,"comment_status":"closed","ping_status":"closed","template":"templates\/page-withsidebar.php","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-9394","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Purple loosestrife - Cooperative Extension: Maine Wild Blueberries - University of Maine Cooperative Extension<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/extension.umaine.edu\/blueberries\/weed-images\/herbaceous-broadleaf-weeds\/bluepurple-flowers\/purple-loosestrife\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Purple loosestrife - Cooperative Extension: Maine Wild Blueberries - University of Maine Cooperative Extension\" \/>\n<meta property=\"og:description\" content=\"Prepared by Jennifer L. D&#8217;Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated April 2019. Scientific name: Lythrum salicaria L. 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