{"id":1130,"date":"2025-06-24T17:10:33","date_gmt":"2025-06-24T17:10:33","guid":{"rendered":"https:\/\/sites.rutgers.edu\/nursery-ipm\/?p=1130"},"modified":"2025-08-27T19:35:57","modified_gmt":"2025-08-27T19:35:57","slug":"oak-spider-mites","status":"publish","type":"post","link":"https:\/\/sites.rutgers.edu\/nursery-ipm\/oak-spider-mites\/","title":{"rendered":"Oak Spider Mites"},"content":{"rendered":"<h2><strong>Oak Spider Mites (<em>Oligonychus bicolor<\/em>)<\/strong><\/h2>\n<h4><strong>GDD Window (base 50): 802-1265 (1st generation)<\/strong><\/h4>\n<h5><\/h5>\n<h4><strong>Overview:<\/strong>\u200b\u200b\u200b<\/h4>\n<ul>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"3\" data-aria-level=\"1\">Classified as a warm season mite<\/li>\n<li>Overwinter as eggs on bark\u200b\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"4\" data-aria-level=\"1\">Thrives in dry conditions\u00a0\u00a0\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"5\" data-aria-level=\"1\">Feeding occurs through the summer months on the upper side of the leaves (unique with this species)\u00a0\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"6\" data-aria-level=\"1\">Infestations are highest on the foliage of lower branches\u00a0\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"7\" data-aria-level=\"1\">Use piercing-sucking mouthparts to feed in leaf plant cells and remove fluids\u00a0\u00a0\u200b\n<ul>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1170\" data-aria-posinset=\"8\" data-aria-level=\"2\">Causes chlorotic stippling that is initially dull and yellow\u00a0\u00a0\u200b<\/li>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1170\" data-aria-posinset=\"9\" data-aria-level=\"2\">Bronzing appears on upper leaf surfaces as dead tissues dry\u00a0\u00a0\u200b<\/li>\n<\/ul>\n<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"10\" data-aria-level=\"1\">Eggs are deposited on\u00a0upper leaf surfaces, along the mid-vein\u00a0\u00a0\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"11\" data-aria-level=\"1\">Multiple generations, peak populations in mid to late summer\u00a0\u00a0\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"12\" data-aria-level=\"1\">Trees growing along streets or in parking lots can have higher infestations due\u00a0to\u00a0higher temperatures in these areas\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"13\" data-aria-level=\"1\">Bronze discoloration on upper leaf surfaces of red oak group trees\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"14\" data-aria-level=\"1\">Symptoms often concentrated along major leaf veins\u00a0\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"15\" data-aria-level=\"1\">White eggshells and cast skins can be observed in the vein crevices\u00a0\u00a0\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"16\" data-aria-level=\"1\">Eggs laid on upper leaf surfaces become\u00a0reddish and barrel shaped before hatching\u00a0\u00a0\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"450\" data-aria-posinset=\"17\" data-aria-level=\"1\">Final generation lays eggs on the woody bark to overwinter\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"1\" data-aria-level=\"1\"><strong>Host plants:<\/strong>\u00a0red\u00a0oak group,\u00a0birch, chestnut, beech, elm, hickory\u200b<\/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=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"2\" data-aria-level=\"2\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Natural predators:<\/span><\/b><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0 lady beetles, <\/span>minute pirate bugs, big-eyed bugs, predacious thrips, or predatory mites\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\">Syringing for small trees\u200b\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"167\" data-font=\"Wingdings,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1980\" data-aria-posinset=\"4\" data-aria-level=\"3\">Mites on upper leaf surfaces\u200b<\/li>\n<\/ul>\n<\/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\">Do not apply excessive levels of nitrogen\u200b<\/li>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"6\" data-aria-level=\"2\">Do not spray carbaryl\u00a0\u200b\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"167\" data-font=\"Wingdings,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1980\" data-aria-posinset=\"7\" data-aria-level=\"3\">(aphrodisiac)\u200b<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<\/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:\u00a0<\/span><\/b>\u200b\n<ul>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1170\" data-aria-posinset=\"2\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Pyrethroids [3]\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003\u2003<\/span>\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=\"3\" data-aria-level=\"1\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Systemic \/ Translaminar insecticides:<\/span><\/b>\u200b\n<ul>\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\">\u00a0<\/span><span data-usefontface=\"true\" data-contrast=\"none\">Bifenazate<\/span><span data-usefontface=\"true\" data-contrast=\"none\">\u00a0[20D] (reduced risk)<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"5\" data-aria-level=\"2\"><span data-usefontface=\"true\" data-contrast=\"none\">Acequinocyl<\/span><span data-usefontface=\"true\" data-contrast=\"none\">\u00a0[20B] (reduced risk)<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"6\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Abamectin [6]<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"7\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Acephate<\/span><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0[1B] (translaminar)<\/span>\u200b<\/li>\n<\/ul>\n<\/li>\n<li data-charcodes=\"111\" data-font=\"Courier New,monospace\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"8\" data-aria-level=\"1\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Considerations:<\/span><\/b>\u200b\n<ul>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"9\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Will harm non-target species<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5><strong>Biorationals:<\/strong><\/h5>\n<ul>\n<li>Horticultural oil \/ Insecticidal soaps\u200b\n<ul>\n<li>For overwintering eggs\u200b<\/li>\n<li>Target sprays in webbed areas\u200b<\/li>\n<\/ul>\n<\/li>\n<li>Mite growth inhibitors: (MGRs)\u200b\n<ul>\n<li>Hexythiazox [10A] &amp; spiromesifen [23]\u200b<\/li>\n<li>(Will not control adults)\u200b<\/li>\n<\/ul>\n<\/li>\n<li><em>Beauvaria bassiana<\/em>\u200b<\/li>\n<li>Note: Miticides are not recommended<br \/>\nunless stippling damage is evident<br \/>\non over 10% of the foliage and<br \/>\nbeating tray counts average more<br \/>\nthan 10 mites with branches<br \/>\ntapped (double when predators<br \/>\nare numerous)\u200b<\/li>\n<\/ul>\n<h4><strong>Resources:<\/strong><\/h4>\n<h5><a class=\"btn btn-primary\" href=\"https:\/\/plant-pest-advisory.rutgers.edu\/cool-season-mites-have-faded-but-warm-season-mites-now-surge\/\" target=\"_blank\" rel=\"noopener\">Cool Season Mites Fade, As Warm Season Mites Surge &#8211; PPA<\/a><\/h5>\n<p><a class=\"btn btn-primary\" href=\"https:\/\/plant-pest-advisory.rutgers.edu\/summer-pests-on-oaks-oak-sawflies-oak-spider-mites-oak-lace-bugs\/#:~:text=Credit%3A%20Steven%20K.-,Rettke%2C%20Rutgers%20Coop,Ext.)&amp;text=Oak%20Spider%20Mites%20(Oligonychus%20bicolor,multiple%20generations%20lay%20additional%20eggs.\" target=\"_blank\" rel=\"noopener\">Summer Pests on Oaks: Oak Sawflies, Oak Spider Mites &amp; Oak Lace Bugs<\/a><\/p>\n<p>&nbsp;<\/p>\n<div class=\"mceTemp\"><\/div>\n<figure id=\"attachment_1131\" aria-describedby=\"caption-attachment-1131\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1131\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee11-Oak-Spider-Mites-300x222.jpg\" alt=\"\" width=\"300\" height=\"222\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee11-Oak-Spider-Mites-300x222.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee11-Oak-Spider-Mites.jpg 730w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1131\" class=\"wp-caption-text\">Various signs from oak spider mites are observed on the upper leaf surface of the sawtooth oak leaf. (Photo Credit: Steven K. Rettke, Rutgers Coop. Ext.)<\/figcaption><\/figure>\n<figure id=\"attachment_1132\" aria-describedby=\"caption-attachment-1132\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1132\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee12-Oak-Spider-Mites-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee12-Oak-Spider-Mites-300x225.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee12-Oak-Spider-Mites.jpg 719w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1132\" class=\"wp-caption-text\">Turn the sawtooth oak leaf over to view the undersides &amp; it appears clean. No spider mite signs observable. (Photo Credit: Steven K. Rettke, Rutgers Coop. Ext.)<\/figcaption><\/figure>\n<figure id=\"attachment_1133\" aria-describedby=\"caption-attachment-1133\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1133\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee7-Oak-Spider-Mites-300x224.jpg\" alt=\"\" width=\"300\" height=\"224\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee7-Oak-Spider-Mites-300x224.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee7-Oak-Spider-Mites.jpg 735w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1133\" class=\"wp-caption-text\">Feeding symptoms by oak spider mites can be seen on these oak leaves. (Photo Credit: Steven K. Rettke, Rutgers Coop. Ext.)<\/figcaption><\/figure>\n<figure id=\"attachment_1134\" aria-describedby=\"caption-attachment-1134\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1134\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee8-Oak-Spider-Mites-300x228.jpg\" alt=\"\" width=\"300\" height=\"228\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee8-Oak-Spider-Mites-300x228.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee8-Oak-Spider-Mites.jpg 719w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1134\" class=\"wp-caption-text\">Closer view allows the white cast skins &amp; white egg shells to be seen congregating along the crevices of the leaf veins. (Photo Credit: Steven K. Rettke, Rutgers Coop. Ext.)<\/figcaption><\/figure>\n<figure id=\"attachment_1135\" aria-describedby=\"caption-attachment-1135\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1135\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee9-Oak-Spider-Mites-300x221.jpg\" alt=\"\" width=\"300\" height=\"221\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee9-Oak-Spider-Mites-300x221.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee9-Oak-Spider-Mites.jpg 729w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1135\" class=\"wp-caption-text\">An even closer view shows a greater accumulation of spider mite cast skins &amp; egg shells as the color contrast makes these signs obvious. (Photo Credit: Steven K. Rettke, Rutgers Coop. Ext.)<\/figcaption><\/figure>\n<figure id=\"attachment_1136\" aria-describedby=\"caption-attachment-1136\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1136\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee10-Oak-Spider-Mites-cast-skins-osu.edu_-300x221.png\" alt=\"\" width=\"300\" height=\"221\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee10-Oak-Spider-Mites-cast-skins-osu.edu_-300x221.png 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee10-Oak-Spider-Mites-cast-skins-osu.edu_.png 727w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1136\" class=\"wp-caption-text\">Active oak spider mites &amp; eggs can be washed off leaves with a strong jet-spray of water. (Photo Credit: David Shetlar, Ohio State Coop. Ext.)<\/figcaption><\/figure>\n<div class=\"mceTemp\"><\/div>\n<div class=\"mceTemp\"><\/div>\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>Oak Spider Mites (Oligonychus bicolor) GDD Window (base 50): 802-1265 (1st generation) Overview:\u200b\u200b\u200b Classified as a warm season mite Overwinter as eggs on bark\u200b\u200b Thrives in dry conditions\u00a0\u00a0\u200b Feeding occurs &hellip; <a href=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/oak-spider-mites\/\" class=\"\">Read More<\/a><\/p>\n","protected":false},"author":3407,"featured_media":1135,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15],"tags":[],"class_list":["post-1130","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>Oak Spider Mites - 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\/oak-spider-mites\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oak Spider Mites - Nursery IPM\" \/>\n<meta property=\"og:description\" content=\"Oak Spider Mites (Oligonychus bicolor) GDD Window (base 50): 802-1265 (1st generation) Overview:\u200b\u200b\u200b Classified as a warm season mite Overwinter as eggs on bark\u200b\u200b Thrives in dry conditions\u00a0\u00a0\u200b Feeding occurs &hellip; Read More\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/oak-spider-mites\/\" \/>\n<meta property=\"og:site_name\" content=\"Nursery IPM\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-24T17:10:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-27T19:35:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/ee9-Oak-Spider-Mites.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"729\" \/>\n\t<meta property=\"og:image:height\" content=\"536\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Erin O. 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