{"id":1397,"date":"2025-08-26T18:12:45","date_gmt":"2025-08-26T18:12:45","guid":{"rendered":"https:\/\/sites.rutgers.edu\/nursery-ipm\/?p=1397"},"modified":"2025-08-27T18:45:38","modified_gmt":"2025-08-27T18:45:38","slug":"douglas-fir-needle-midge","status":"publish","type":"post","link":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/","title":{"rendered":"Douglas-fir Needle Midge"},"content":{"rendered":"<h2><strong>Douglas-fir Needle Midge (<em>Contarinia pseudotsugae<\/em>)<\/strong><\/h2>\n<h4><strong>GDD Window (base 50): 200-400 (adult emergence)<\/strong><\/h4>\n<h5><\/h5>\n<h4><strong>Overview:<\/strong>\u200b\u200b\u200b<\/h4>\n<ul>\n<li>Larvae reside in the swollen areas of needles\u00a0 \u200b<\/li>\n<li>Often not observed during mid-summer\u00a0 \u200b<\/li>\n<li>Maggot is less than 5 mm in size\u00a0 \u200b<\/li>\n<li>Larvae can be exposed later in the season by opening the swollen area with a sewing needle\u00a0 \u200b<\/li>\n<li>Larvae drop to the ground in November or December and overwinter in the soil under the tree they infested\u00a0 \u200b<\/li>\n<li>Pupation occurs in early spring as soil temperatures increase\u00a0 \u200b<\/li>\n<li>Adults emerge in late April and May \u200b<\/li>\n<li>Adults can create mating clouds before beginning to lay eggs in the new needle growth\u200b<\/li>\n<li>Causes a twisted distortion of the needles, with yellow banding &amp; swollen areas\u00a0 \u200b<\/li>\n<li>Swollen areas turn brown or purple at maturity\u00a0 \u200b<\/li>\n<li>Symptoms mimic the Cooley spruce gall adelgid &amp; some needle cast diseases\u200b<\/li>\n<li><strong>Host plants:<\/strong> Douglas-firs<\/li>\n<\/ul>\n<h4><strong>Management:<\/strong><\/h4>\n<h5><strong>Cultural Practices:<\/strong><\/h5>\n<ul>\n<li><b><span data-usefontface=\"false\" data-contrast=\"none\">Natural predators:<\/span><\/b><span data-usefontface=\"false\" data-contrast=\"none\"> parasitoids (<em>Platygaster<\/em> and <em>Gastancistrus <\/em>parasitic wasps)\u200b<\/span><\/li>\n<li>Plant varieties with a delayed bud break \u200b<\/li>\n<li>Increase tree diversity\u00a0 \u200b<\/li>\n<li>Remove heavily infested trees \u200b<\/li>\n<li>Prune heavily infested branches\u200b<\/li>\n<\/ul>\n<h5><strong>Materials:<\/strong><\/h5>\n<ul>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"1\" data-aria-level=\"1\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Contact insecticides:<\/span><\/b>\u200b\n<ul>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"2\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Pyrethroids [3A]: -thrins<\/span>\u200b\u200b<\/li>\n<\/ul>\n<\/li>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"4\" data-aria-level=\"1\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Systemic insecticides:<\/span><\/b>\u200b\n<ul>\n<li>Organophosphates [1B]: Acephate<\/li>\n<\/ul>\n<\/li>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"7\" data-aria-level=\"1\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Considerations:<\/span><\/b>\u200b\n<ul>\n<li>Can harm non-target species\u200b<\/li>\n<li>Determine best treatment window using traps \u200b\n<ul>\n<li>Traps should be placed\u00a0 before late April \u200b<\/li>\n<li>Detection traps can be made with an upside-down plastic recycling bin \u200b\n<ul>\n<li>Cut a hole in the side of a box to fit a clear empty jar inside \u200b<\/li>\n<li>Place a dry, crumpled paper towel in the jar to absorb moisture\u200b<\/li>\n<li>Emerging adults will be attracted to the light coming from the jar\u200b<\/li>\n<li>\n<p><figure id=\"attachment_1398\" aria-describedby=\"caption-attachment-1398\" style=\"width: 341px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-1398\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.09.32\u202fPM-273x300.png\" alt=\"\" width=\"341\" height=\"375\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.09.32\u202fPM-273x300.png 273w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.09.32\u202fPM.png 464w\" sizes=\"(max-width: 341px) 100vw, 341px\" \/><figcaption id=\"caption-attachment-1398\" class=\"wp-caption-text\">Photo: Sandy Gardosik, PA Dept. of Ag<\/figcaption><\/figure><\/li>\n<\/ul>\n<\/li>\n<li>Control sprays should be made within one week of the first catch\u00a0 \u200b<\/li>\n<li>Additional sprays can be made after 10 days\u200b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u200b<\/p>\n<figure id=\"attachment_1399\" aria-describedby=\"caption-attachment-1399\" style=\"width: 453px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-1399\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM-300x231.png\" alt=\"\" width=\"453\" height=\"349\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM-300x231.png 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM.png 640w\" sizes=\"(max-width: 453px) 100vw, 453px\" \/><figcaption id=\"caption-attachment-1399\" class=\"wp-caption-text\">Photo: Steven K. Rettke, RCE<\/figcaption><\/figure>\n<figure id=\"attachment_1400\" aria-describedby=\"caption-attachment-1400\" style=\"width: 458px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-1400\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.03\u202fPM-300x211.png\" alt=\"\" width=\"458\" height=\"322\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.03\u202fPM-300x211.png 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.03\u202fPM.png 538w\" sizes=\"(max-width: 458px) 100vw, 458px\" \/><figcaption id=\"caption-attachment-1400\" class=\"wp-caption-text\">Photo: Steven K. Rettke, RCE<\/figcaption><\/figure>\n<figure id=\"attachment_1402\" aria-describedby=\"caption-attachment-1402\" style=\"width: 455px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-1402\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.26\u202fPM-289x300.png\" alt=\"\" width=\"455\" height=\"472\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.26\u202fPM-289x300.png 289w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.26\u202fPM.png 496w\" sizes=\"(max-width: 455px) 100vw, 455px\" \/><figcaption id=\"caption-attachment-1402\" class=\"wp-caption-text\">Photo: Steven K. Rettke, RCE<\/figcaption><\/figure>\n<figure id=\"attachment_1401\" aria-describedby=\"caption-attachment-1401\" style=\"width: 510px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-1401\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.15\u202fPM-300x209.png\" alt=\"\" width=\"510\" height=\"355\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.15\u202fPM-300x209.png 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.15\u202fPM.png 538w\" sizes=\"(max-width: 510px) 100vw, 510px\" \/><figcaption id=\"caption-attachment-1401\" class=\"wp-caption-text\">Photo: Steven K. Rettke, RCE<\/figcaption><\/figure>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-1403\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.37\u202fPM-300x205.png\" alt=\"\" width=\"457\" height=\"312\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.37\u202fPM-300x205.png 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.37\u202fPM.png 550w\" sizes=\"(max-width: 457px) 100vw, 457px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-1404\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.45\u202fPM-300x205.png\" alt=\"\" width=\"445\" height=\"304\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.45\u202fPM-300x205.png 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.11.45\u202fPM.png 548w\" sizes=\"(max-width: 445px) 100vw, 445px\" \/><\/p>\n<h6><span class=\"LineBox SCXP56887253 BCX0\"><span class=\"TextRun SCXP56887253 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP56887253 BCX0\">Disclaimer<\/span><\/span><span class=\"TextRun SCXP56887253 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP56887253 BCX0\"> &#8211; Materials do not cover all possible control scenarios and are intended for licensed professionals. Tradenames do not imply\u00a0<\/span><\/span><\/span><span class=\"LineBox SCXP56887253 BCX0\"><span class=\"TextRun SCXP56887253 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP56887253 BCX0\">endorsement and are used as examples. You must strictly follow the label for each compound prior to use. Rutgers is not responsible for<\/span><\/span><\/span><span class=\"LineBox SCXP56887253 BCX0\"><span class=\"TextRun SCXP56887253 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP56887253 BCX0\">m is used materials or damages thereof. The label is the law. Labels will provide detailed information on use and restrictions. Additionally, <\/span><\/span><\/span><span class=\"LineBox SCXP56887253 BCX0\"><span class=\"TextRun SCXP56887253 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP56887253 BCX0\">application intervals, compatibility, surfactant use, PHI, PPE, important and other key information is described in detail. Always discuss\u00a0<\/span><\/span><\/span><span class=\"LineBox SCXP56887253 BCX0\"><span class=\"TextRun SCXP56887253 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP56887253 BCX0\">treatments with your local agents.\u00a0<\/span><\/span><span class=\"TextRun SCXP56887253 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-scheme-color=\"@C00000,,\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP56887253 BCX0\">Note: Neonicotinoids can only be legally applied in commercial agriculture settings by licensed <\/span><\/span><\/span><span class=\"LineBox SCXP56887253 BCX0\"><span class=\"TextRun SCXP56887253 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-scheme-color=\"@C00000,,\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP56887253 BCX0\">applicators.\u00a0<\/span><\/span><span class=\"TextRun SCXP56887253 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-scheme-color=\"@3B7F23,9,18:76000\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP56887253 BCX0\">Guidelines and recommendations made in this presentation are specific to the state of New Jersey.\u00a0<\/span><\/span><\/span><\/h6>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Douglas-fir Needle Midge (Contarinia pseudotsugae) GDD Window (base 50): 200-400 (adult emergence) Overview:\u200b\u200b\u200b Larvae reside in the swollen areas of needles\u00a0 \u200b Often not observed during mid-summer\u00a0 \u200b Maggot is &hellip; <a href=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/\" class=\"\">Read More<\/a><\/p>\n","protected":false},"author":3407,"featured_media":1399,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15],"tags":[],"class_list":["post-1397","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pests"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Douglas-fir Needle Midge - Nursery IPM<\/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:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Douglas-fir Needle Midge - Nursery IPM\" \/>\n<meta property=\"og:description\" content=\"Douglas-fir Needle Midge (Contarinia pseudotsugae) GDD Window (base 50): 200-400 (adult emergence) Overview:\u200b\u200b\u200b Larvae reside in the swollen areas of needles\u00a0 \u200b Often not observed during mid-summer\u00a0 \u200b Maggot is &hellip; Read More\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/\" \/>\n<meta property=\"og:site_name\" content=\"Nursery IPM\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-26T18:12:45+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-27T18:45:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM.png\" \/>\n\t<meta property=\"og:image:width\" content=\"640\" \/>\n\t<meta property=\"og:image:height\" content=\"492\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Erin O. Quinn\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Erin O. Quinn\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/\",\"url\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/\",\"name\":\"Douglas-fir Needle Midge - Nursery IPM\",\"isPartOf\":{\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM.png\",\"datePublished\":\"2025-08-26T18:12:45+00:00\",\"dateModified\":\"2025-08-27T18:45:38+00:00\",\"author\":{\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/#\/schema\/person\/1a070508b880ef7fe0dc180e168e64cf\"},\"breadcrumb\":{\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#primaryimage\",\"url\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM.png\",\"contentUrl\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM.png\",\"width\":640,\"height\":492,\"caption\":\"Photo: Steven K. Rettke, RCE\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Douglas-fir Needle Midge\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/#website\",\"url\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/\",\"name\":\"Nursery IPM\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/#\/schema\/person\/1a070508b880ef7fe0dc180e168e64cf\",\"name\":\"Erin O. Quinn\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/a5e6879be80394bab29d973d1210e67f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/a5e6879be80394bab29d973d1210e67f?s=96&d=mm&r=g\",\"caption\":\"Erin O. Quinn\"},\"url\":\"https:\/\/sites.rutgers.edu\/nursery-ipm\/author\/eoq1\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Douglas-fir Needle Midge - Nursery IPM","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/","og_locale":"en_US","og_type":"article","og_title":"Douglas-fir Needle Midge - Nursery IPM","og_description":"Douglas-fir Needle Midge (Contarinia pseudotsugae) GDD Window (base 50): 200-400 (adult emergence) Overview:\u200b\u200b\u200b Larvae reside in the swollen areas of needles\u00a0 \u200b Often not observed during mid-summer\u00a0 \u200b Maggot is &hellip; Read More","og_url":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/","og_site_name":"Nursery IPM","article_published_time":"2025-08-26T18:12:45+00:00","article_modified_time":"2025-08-27T18:45:38+00:00","og_image":[{"width":640,"height":492,"url":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM.png","type":"image\/png"}],"author":"Erin O. Quinn","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Erin O. Quinn","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/","url":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/","name":"Douglas-fir Needle Midge - Nursery IPM","isPartOf":{"@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/#website"},"primaryImageOfPage":{"@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#primaryimage"},"image":{"@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#primaryimage"},"thumbnailUrl":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM.png","datePublished":"2025-08-26T18:12:45+00:00","dateModified":"2025-08-27T18:45:38+00:00","author":{"@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/#\/schema\/person\/1a070508b880ef7fe0dc180e168e64cf"},"breadcrumb":{"@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#primaryimage","url":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM.png","contentUrl":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/08\/Screenshot-2025-08-27-at-2.10.12\u202fPM.png","width":640,"height":492,"caption":"Photo: Steven K. Rettke, RCE"},{"@type":"BreadcrumbList","@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/douglas-fir-needle-midge\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/sites.rutgers.edu\/nursery-ipm\/"},{"@type":"ListItem","position":2,"name":"Douglas-fir Needle Midge"}]},{"@type":"WebSite","@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/#website","url":"https:\/\/sites.rutgers.edu\/nursery-ipm\/","name":"Nursery IPM","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/sites.rutgers.edu\/nursery-ipm\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/#\/schema\/person\/1a070508b880ef7fe0dc180e168e64cf","name":"Erin O. Quinn","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/sites.rutgers.edu\/nursery-ipm\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/a5e6879be80394bab29d973d1210e67f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/a5e6879be80394bab29d973d1210e67f?s=96&d=mm&r=g","caption":"Erin O. Quinn"},"url":"https:\/\/sites.rutgers.edu\/nursery-ipm\/author\/eoq1\/"}]}},"_links":{"self":[{"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/posts\/1397"}],"collection":[{"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/users\/3407"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/comments?post=1397"}],"version-history":[{"count":1,"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/posts\/1397\/revisions"}],"predecessor-version":[{"id":1405,"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/posts\/1397\/revisions\/1405"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/media\/1399"}],"wp:attachment":[{"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/media?parent=1397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/categories?post=1397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-json\/wp\/v2\/tags?post=1397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}