{"id":709,"date":"2025-04-08T19:03:32","date_gmt":"2025-04-08T19:03:32","guid":{"rendered":"https:\/\/sites.rutgers.edu\/nursery-ipm\/?p=709"},"modified":"2025-08-27T19:45:17","modified_gmt":"2025-08-27T19:45:17","slug":"spruce-spider-mite","status":"publish","type":"post","link":"https:\/\/sites.rutgers.edu\/nursery-ipm\/spruce-spider-mite\/","title":{"rendered":"Spruce Spider Mite"},"content":{"rendered":"<h2><strong>Spruce Spider Mite (<em>Oligonychus ununguis<\/em>)<\/strong><\/h2>\n<h4><strong>GDD Window (base 50): 7-121<\/strong><\/h4>\n<h5><\/h5>\n<h4><strong>Overview:<\/strong><\/h4>\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Eggs are brown, round, flattened and have a thread sticking up from<\/span><span data-usefontface=\"false\" data-contrast=\"none\">their center<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Growth from larvae to adult happens in about a month<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"3\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Adults are \u00bd mm in length, varying from brown to dark green in color, <\/span><span data-usefontface=\"false\" data-contrast=\"none\">with salmon pink colored legs<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"4\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">3-4, but up to 10 generations can occur per year, depending on <\/span><span data-usefontface=\"false\" data-contrast=\"none\">conditions<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"5\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">When temperature is too hot, SSM enters a dormancy period until it\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">becomes cooler in the fall<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"6\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Wind is main dispersal mechanism<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"7\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Leaves behind tiny strands of webbing on the needles of host plants<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"8\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Can lead to damage, dropping needles and a reddish-brown tint<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"9\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Early signs of infestation include a stippled yellow color on the <\/span><span data-usefontface=\"false\" data-contrast=\"none\">upper surface of host needles<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"10\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Prefer older needles over new ones, on the lower inner branches of\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">the tree<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"11\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Can cause sudden damage as reproduction quickly occurs<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"12\" data-aria-level=\"1\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Host plants:\u00a0<\/span><\/b><span data-usefontface=\"false\" data-contrast=\"none\">Ornamental landscape conifers<\/span>\u200b\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"13\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Can be present in natural forests<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4><strong>Management:<\/strong><\/h4>\n<h5><strong>Cultural Practices:<\/strong><\/h5>\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1170\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Natural predators<\/span><span data-usefontface=\"true\" data-contrast=\"none\">:\u00a0<\/span><span data-usefontface=\"true\" data-contrast=\"none\">phytoseiid <\/span><span data-usefontface=\"true\" data-contrast=\"none\">mites, spiders, some beetles, <\/span><span data-usefontface=\"true\" data-contrast=\"none\">lacewings<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1170\" data-aria-posinset=\"3\" data-aria-level=\"2\"><span data-usefontface=\"true\" data-contrast=\"none\">Pests are less active in hot, dry <\/span><span data-usefontface=\"true\" data-contrast=\"none\">weather<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1170\" data-aria-posinset=\"4\" data-aria-level=\"2\"><span data-usefontface=\"true\" data-contrast=\"none\">Simulated rainfall on Fraser fir <\/span><span data-usefontface=\"true\" data-contrast=\"none\">seedlings significantly limits <\/span><span data-usefontface=\"true\" data-contrast=\"none\">spruce spider mite\u00a0<\/span><span data-usefontface=\"true\" data-contrast=\"none\">populations<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1170\" data-aria-posinset=\"5\" data-aria-level=\"2\"><span data-usefontface=\"true\" data-contrast=\"none\">Reduce plant\u00a0<\/span><span data-usefontface=\"true\" data-contrast=\"none\">stress<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1170\" data-aria-posinset=\"6\" data-aria-level=\"2\"><span data-usefontface=\"true\" data-contrast=\"none\">Syringing, or spraying infested <\/span><span data-usefontface=\"true\" data-contrast=\"none\">foliage with a heavy water <\/span><span data-usefontface=\"true\" data-contrast=\"none\">stream, may help to dislodge the <\/span><span data-usefontface=\"true\" data-contrast=\"none\">mites and reduce infestation <\/span><span data-usefontface=\"true\" data-contrast=\"none\">severity.<\/span><span data-usefontface=\"true\" data-contrast=\"none\">\u00a0\u00a0<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1170\" data-aria-posinset=\"7\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Tap branches over white paper <\/span><span data-usefontface=\"false\" data-contrast=\"none\">to scout for\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">presence<\/span><\/li>\n<\/ul>\n<h5><strong>Materials:<\/strong><\/h5>\n<ul style=\"font-weight: 400\">\n<li style=\"font-weight: 400\" data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"1\" data-aria-level=\"1\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Contact insecticides:<\/span><\/b><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0<\/span>\u200b\n<ul style=\"font-weight: 400\">\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\">Avermectins<\/span><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0[6]: Abamectin\u00a0<\/span>\u200b<\/li>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"3\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Pyrethroids [3]: &#8211;<\/span><span data-usefontface=\"false\" data-contrast=\"none\">thrins<\/span><span data-usefontface=\"false\" data-contrast=\"none\">, Tau-<\/span><span data-usefontface=\"false\" data-contrast=\"none\">fluvalinate\u00a0\u00a0<\/span>\u200b<\/li>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"4\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">METI acaricides and insecticides <\/span><span data-usefontface=\"false\" data-contrast=\"none\">[21A]:\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">Fenazaquin<\/span><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0<\/span>\u200b<\/li>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"5\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Spinosyns [5]: Spinosad<\/span><span style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;font-size: 1rem\">\u200b<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400\" data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"4\" data-aria-level=\"1\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Systemic insecticides:<\/span><\/b><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0<\/span>\u200b\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"7\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Tetronics<\/span><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0[23]:\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">Spirotetramat<\/span>\u200b<\/li>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"8\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Organophosphates <\/span><span data-usefontface=\"false\" data-contrast=\"none\">[1B]:\u00a0Malathion,\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">Acephate<\/span><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0<\/span><\/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 style=\"font-weight: 400\"><span data-usefontface=\"false\" data-contrast=\"none\">Considerations:<\/span><\/b>\u200b\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"10\" data-aria-level=\"2\">Will harm beneficial and non-target species.\u200b<span class=\"LineBox SCXP35590923 BCX0\" style=\"font-weight: 400\"><span class=\"EOP SCXP35590923 BCX0\">\u200b<\/span><\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5><strong>Biorationals:<\/strong><\/h5>\n<ul>\n<li><span data-scheme-color=\"@000000,,\" data-usefontface=\"true\" data-contrast=\"none\">MGI\u00a0[10A]:\u00a0<\/span><span data-scheme-color=\"@000000,,\" data-usefontface=\"true\" data-contrast=\"none\">Hexythiazox<\/span>\u200b<\/li>\n<li><span data-scheme-color=\"@000000,,\" data-usefontface=\"true\" data-contrast=\"none\">MGI<\/span><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0[10B]:\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">Etoxazole<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Azadirachtin [UN]<\/span>\u200b<\/li>\n<li><i><span data-usefontface=\"false\" data-contrast=\"none\">Beauveria bassiana<\/span><\/i><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0\u00a0<\/span>\u200b<\/li>\n<li><i><span data-usefontface=\"false\" data-contrast=\"none\">Chromobacterium<\/span><\/i><i><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0<\/span><\/i><i><span data-usefontface=\"false\" data-contrast=\"none\">subtsugae<\/span><\/i><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0\u00a0<\/span>\u200b<\/li>\n<li><i><span data-usefontface=\"false\" data-contrast=\"none\">Metarhizium\u00a0anisopliae<\/span><\/i><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0(<\/span><i><span data-usefontface=\"false\" data-contrast=\"none\">robertii<\/span><\/i><span data-usefontface=\"false\" data-contrast=\"none\">)<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Horticultural oil<\/span>\u200b\n<ul>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Test for phytotoxicity before <\/span><span data-usefontface=\"false\" data-contrast=\"none\">spraying the whole plant.\u00a0<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<div class=\"mceTemp\"><\/div>\n<div class=\"mceTemp\"><\/div>\n<figure id=\"attachment_710\" aria-describedby=\"caption-attachment-710\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-710\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-14-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-14-300x225.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-14-768x576.jpg 768w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-14.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-710\" class=\"wp-caption-text\">Photo: Steven K. Rettke, Rutgers Cooperative Extension<\/figcaption><\/figure>\n<figure id=\"attachment_712\" aria-describedby=\"caption-attachment-712\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-712\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-1-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-1-300x225.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-1-768x576.jpg 768w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-1.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-712\" class=\"wp-caption-text\">Photo: Steven K. Rettke, Rutgers Cooperative Extension<\/figcaption><\/figure>\n<figure id=\"attachment_713\" aria-describedby=\"caption-attachment-713\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-713\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-5-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-5-300x225.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-5-768x576.jpg 768w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-5.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-713\" class=\"wp-caption-text\">Photo: Steven K. Rettke, Rutgers Cooperative Extension<\/figcaption><\/figure>\n<figure id=\"attachment_714\" aria-describedby=\"caption-attachment-714\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-714\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-6-300x206.jpg\" alt=\"\" width=\"300\" height=\"206\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-6-300x206.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-6-768x528.jpg 768w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-6.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-714\" class=\"wp-caption-text\">Photo: Steven K. Rettke, Rutgers Cooperative Extension<\/figcaption><\/figure>\n<p>&nbsp;<\/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>Spruce Spider Mite (Oligonychus ununguis) GDD Window (base 50): 7-121 Overview: Eggs are brown, round, flattened and have a thread sticking up fromtheir center\u200b Growth from larvae to adult happens &hellip; <a href=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/spruce-spider-mite\/\" class=\"\">Read More<\/a><\/p>\n","protected":false},"author":3407,"featured_media":711,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15],"tags":[],"class_list":["post-709","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>Spruce Spider Mite - 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\/spruce-spider-mite\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spruce Spider Mite - Nursery IPM\" \/>\n<meta property=\"og:description\" content=\"Spruce Spider Mite (Oligonychus ununguis) GDD Window (base 50): 7-121 Overview: Eggs are brown, round, flattened and have a thread sticking up fromtheir center\u200b Growth from larvae to adult happens &hellip; Read More\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/spruce-spider-mite\/\" \/>\n<meta property=\"og:site_name\" content=\"Nursery IPM\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-08T19:03:32+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-27T19:45:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/Spruce-Spider-Mites-Blog-11.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Erin O. 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