{"id":1930,"date":"2010-02-25T16:20:34","date_gmt":"2010-02-25T21:20:34","guid":{"rendered":"https:\/\/extension.umaine.edu\/cranberries\/?page_id=1930"},"modified":"2024-03-27T19:43:45","modified_gmt":"2024-03-27T19:43:45","slug":"spongy-moth","status":"publish","type":"page","link":"https:\/\/extension.umaine.edu\/cranberries\/grower-services\/insects\/spongy-moth\/","title":{"rendered":"Spongy Moth"},"content":{"rendered":"<p><strong>Order:<\/strong> Lepidoptera || <strong>Family:<\/strong> Lymantriidae<br \/>\n<em><strong><span style=\"font-style: normal\">Scientific Name: <\/span><\/strong>Lymantria dispar <\/em>(L.)<\/p>\n<hr \/>\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: 20%;\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-1930 gallery-columns-5 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/gypsy2.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/gypsy2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"A mid-sized Spongy Moth caterpillar beside a Canadian penny for scale purposes.\" aria-describedby=\"gallery-1-1934\" srcset=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/gypsy2-150x150.jpg 150w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/gypsy2-32x32.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-1-1934'>\n\t\t\t\tSpongy Moth (mid-sized larva)\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\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Gypsy-Moth-Larva-mature-1999.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Gypsy-Moth-Larva-mature-1999-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Spongy Moth Larva (mature) 1999\" aria-describedby=\"gallery-1-1935\" srcset=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Gypsy-Moth-Larva-mature-1999-150x150.jpg 150w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/Gypsy-Moth-Larva-mature-1999-32x32.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-1-1935'>\n\t\t\t\tSpongy Moth (final instar larva)\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\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/GypsyMoth-femaleeggmass2001a.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/GypsyMoth-femaleeggmass2001a-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"photo of a female Spongy moth, plus her egg mass under her\" aria-describedby=\"gallery-1-1933\" srcset=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/GypsyMoth-femaleeggmass2001a-150x150.jpg 150w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/GypsyMoth-femaleeggmass2001a-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-1-1933'>\n\t\t\t\tA female Spongy moth, with her egg mass beneath her.\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\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/GypsyMoth.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/GypsyMoth-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Gypsy Moth (various photos of caterpillars, and male and female moths, with labels)\" aria-describedby=\"gallery-1-1936\" srcset=\"https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/GypsyMoth-150x150.jpg 150w, https:\/\/extension.umaine.edu\/cranberries\/wp-content\/uploads\/sites\/40\/2010\/02\/GypsyMoth-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-1-1936'>\n\t\t\t\tClick for a larger view\n\t\t\t\t<\/dd><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<hr \/>\n<p><strong>Notes: <\/strong>The caterpillars of Spongy moth begin to show up on Maine cranberry beds during the first week of June, generally (plus or minus a week). \u00a0Most are blown in from forested areas though they can also overwinter on the beds themselves. Their numbers can be fairly numerous in some years, although <strong>zero<\/strong> <strong>were found during the entire 2009 cranberry season<\/strong> by UMaine Extension\u2019s cranberry scientist. \u00a0If they are found, add their numbers together with any cutworms and humped green fruitworms found <em>(when determining a count to use in conjunction with the Action Threshold, which is typically an average of 4.5 caterpillars per 25 sweeps). <\/em><\/p>\n<p><strong>Spongy moth is cyclic<\/strong> and in the past has undergone major outbreaks every nine to ten years in the northeastern U.S. and Canada. Historically, this insect is one of North America\u2019s most devastating forest pests <em>(it is especially fond of oak and aspen).<\/em> It has no problem eating cranberry foliage as well, however. Check for patchy infestations that can be spot-treated, <em>e.g. <\/em>along bed edges facing trees that might be infested. Check previously infested areas (eggs can overwinter on flooded beds). Early detection is key: larvae consume the terminal buds and any new growth that has begun.<\/p>\n<p><strong>Some Sweepnet &#8216;First Dates&#8217;:<\/strong> 5\/29\/00, 5\/20\/01, 6\/13\/02, 6\/12\/06, 6\/6\/07, zero found in 2009, 5\/16\/2013 (central Maine), 5\/21\/2018 (western Maine) <em><strong>(Average of these = May 30th)<\/strong><\/em><\/p>\n<p><em>See also <\/em>the<strong>\u00a0<a href=\"https:\/\/extension.umaine.edu\/cranberries\/grower-services\/cranberry-ipm-guide\/\">Maine Cranberry Pest Management Guide<\/a><\/strong> to find specific and current control recommendations.<\/p>\n<hr \/>\n<p><strong><a href=\"http:\/\/ag.umass.edu\/landscape\/fact-sheets\/gypsy-moth\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Learn more about spongy moth<\/strong><\/a> <\/strong>[courtesy of UMass]<\/p>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>Order: Lepidoptera || Family: Lymantriidae Scientific Name: Lymantria dispar (L.) Notes: The caterpillars of Spongy moth begin to show up on Maine cranberry beds during the first week of June, generally (plus or minus a week). \u00a0Most are blown in from forested areas though they can also overwinter on the beds themselves. Their numbers can [&hellip;]<\/p>\n","protected":false},"author":60,"featured_media":0,"parent":461,"menu_order":7,"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-1930","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>Spongy Moth - Cooperative Extension: Cranberries - 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\/cranberries\/grower-services\/insects\/spongy-moth\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spongy Moth - Cooperative Extension: Cranberries - University of Maine Cooperative Extension\" \/>\n<meta property=\"og:description\" content=\"Order: Lepidoptera || Family: Lymantriidae Scientific Name: Lymantria dispar (L.) 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