{"id":698,"date":"2025-04-08T18:46:13","date_gmt":"2025-04-08T18:46:13","guid":{"rendered":"https:\/\/sites.rutgers.edu\/nursery-ipm\/?p=698"},"modified":"2025-08-27T19:45:31","modified_gmt":"2025-08-27T19:45:31","slug":"hemlock-rust-mite","status":"publish","type":"post","link":"https:\/\/sites.rutgers.edu\/nursery-ipm\/hemlock-rust-mite\/","title":{"rendered":"Hemlock Rust Mite"},"content":{"rendered":"<h2><strong>Hemlock Rust Mite (<em>Nalepella tsugifoliae<\/em>)<\/strong><\/h2>\n<h4><strong>GDD Window (base 50): 7-450 (7-22: active mites emerge)<\/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\">Tiny, wormlike insects that require magnification to be seen<\/span>\u200b\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"2\" data-aria-level=\"2\"><span data-usefontface=\"true\" data-contrast=\"none\">In the spring, scout using a 10x hand lens\u00a0\u00a0<\/span>\u200b<\/li>\n<\/ul>\n<\/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=\"true\" data-contrast=\"none\">Adult mites are yellow and spindle-shaped with four legs\u00a0<\/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=\"true\" data-contrast=\"none\">Thin, white colored cast skins may be visible with magnification\u00a0<\/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=\"true\" data-contrast=\"none\">Tiny, yellowish-orange eggs\u00a0<\/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=\"true\" data-contrast=\"none\">Overwintering eggs are reddish to tan, laid in clusters<\/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\">Adults overwinter in the cracks of bark<\/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=\"true\" data-contrast=\"none\">Feed on needles of hosts year round\u00a0<\/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=\"true\" data-contrast=\"none\">Feed by injecting saliva and sucking out plant juice\u00a0<\/span>\u200b\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"10\" data-aria-level=\"2\"><span data-usefontface=\"true\" data-contrast=\"none\">Tiny pale spot forms at each feeding puncture\u00a0\u00a0<\/span>\u200b<\/li>\n<\/ul>\n<\/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=\"true\" data-contrast=\"none\">Causes most of its damage in the spring, and damage becomes <\/span><span data-usefontface=\"true\" data-contrast=\"none\">most noticeable by mid-summer\u00a0\u00a0<\/span>\u200b\n<ul style=\"font-weight: 400\">\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1260\" data-aria-posinset=\"12\" data-aria-level=\"2\"><span data-usefontface=\"true\" data-contrast=\"none\">By that time, populations die off\u00a0<\/span>\u200b<\/li>\n<\/ul>\n<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"13\" data-aria-level=\"1\"><span data-usefontface=\"true\" data-contrast=\"none\">Foliage may appear blue-<\/span><span data-usefontface=\"true\" data-contrast=\"none\">ish<\/span><span data-usefontface=\"true\" data-contrast=\"none\"> and turn yellow before dropping\u00a0<\/span><span data-usefontface=\"true\" data-contrast=\"none\">from the plant\u00a0<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"14\" data-aria-level=\"1\"><span data-usefontface=\"true\" data-contrast=\"none\">Populations thrive in cool and dry conditions<\/span>\u200b<\/li>\n<li data-charcodes=\"8226\" data-font=\"Arial,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"15\" data-aria-level=\"1\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Host plants:<\/span><\/b><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0Fir, Golden larch, Hemlock, Spruce, Yew<\/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<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\"><span data-usefontface=\"false\" data-contrast=\"none\">Natural predators: predatory mites, <\/span><span data-usefontface=\"false\" data-contrast=\"none\">lady beetles, lacewings,\u00a0<\/span><i><span data-usefontface=\"false\" data-contrast=\"none\">Hirsutella <\/span><\/i><i><span data-usefontface=\"false\" data-contrast=\"none\">thompsonii<\/span><\/i><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0(parasitic fungus)<\/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\">Prune out and destroy individual, <\/span><span data-usefontface=\"false\" data-contrast=\"none\">infested branches when possible<\/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<h5><strong>Materials:<\/strong><\/h5>\n<ul style=\"font-weight: 400\">\n<li 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=\"1\"><span data-usefontface=\"false\" data-contrast=\"none\">Pyrethroids [3]: Pyrethrin\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\">Pyrethrins [3+Synergist]: Pyrethrin + <\/span><span data-usefontface=\"false\" data-contrast=\"none\">piperonyl butoxide<\/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\">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=\"5\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Carbamate [1A]: Carbaryl<\/span>\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\"><span data-usefontface=\"false\" data-contrast=\"none\">Mito.\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">Compx<\/span><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0III [20D]:\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">Bifenazate<\/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 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=\"540\" data-aria-posinset=\"4\" data-aria-level=\"1\"><span style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;font-size: 1rem\"><span class=\"TextRun SpellingErrorZoomed SCXP80598823 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"SCXP80598823 BCX0\">Tetronics<\/span><\/span><span class=\"TextRun SCXP80598823 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP80598823 BCX0\">\u00a0[23]:\u00a0<\/span><\/span><span class=\"TextRun SpellingErrorZoomed SCXP80598823 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"SCXP80598823 BCX0\">Spirotetramat<\/span><\/span><span class=\"TextRun SCXP80598823 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP80598823 BCX0\">\u00a0<\/span><\/span>\u200b<\/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><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\"><span data-usefontface=\"false\" data-contrast=\"none\">Pyrethroids and carbamates\u00a0<\/span><b><span data-usefontface=\"false\" data-contrast=\"none\">will <\/span><\/b><b><span data-usefontface=\"false\" data-contrast=\"none\">harm beneficial predators if <\/span><\/b><b><span data-usefontface=\"false\" data-contrast=\"none\">present.<\/span><\/b>\u200b<span class=\"LineBox SCXP35590923 BCX0\"><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\">Clofentezine<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">MGI [10B]:\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">Etoxazole<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Horticultural oil (neem oil)<\/span>\n<ul>\n<li><span class=\"LineBox SCXP62949203 BCX0\"><span class=\"TextRun SCXP62949203 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP62949203 BCX0\">Apply 7-10 days before bud break a<\/span><\/span><\/span><span class=\"LineBox SCXP62949203 BCX0\"><span class=\"TextRun SCXP62949203 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP62949203 BCX0\">nd again at bud break to target <\/span><\/span><\/span><span class=\"LineBox SCXP62949203 BCX0\"><span class=\"TextRun SCXP62949203 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP62949203 BCX0\">eriophyid mites and avoid <\/span><\/span><\/span><span class=\"LineBox SCXP62949203 BCX0\"><span class=\"TextRun SCXP62949203 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP62949203 BCX0\">impact on beneficial insects.<\/span><\/span><\/span><span class=\"LineBox SCXP62949203 BCX0\"><span class=\"TextRun SCXP62949203 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP62949203 BCX0\">Test for phytotoxicity before <\/span><\/span><\/span><span class=\"LineBox SCXP62949203 BCX0\"><span class=\"TextRun SCXP62949203 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP62949203 BCX0\">spraying the whole plant.\u00a0<\/span><\/span><span class=\"EOP SCXP62949203 BCX0\">\u200b<\/span><\/span>\u200b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<div class=\"mceTemp\"><\/div>\n<div class=\"mceTemp\"><\/div>\n<figure id=\"attachment_700\" aria-describedby=\"caption-attachment-700\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-700\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/m2-Hemlock-Rust-Mite-2-300x234.jpg\" alt=\"\" width=\"300\" height=\"234\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/m2-Hemlock-Rust-Mite-2-300x234.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/m2-Hemlock-Rust-Mite-2.jpg 758w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-700\" class=\"wp-caption-text\">Photo: Ohio State Cooperative Extension<\/figcaption><\/figure>\n<figure id=\"attachment_701\" aria-describedby=\"caption-attachment-701\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-701\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/fff9-Hemlock-Rust-Mites-12-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/fff9-Hemlock-Rust-Mites-12-300x225.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/fff9-Hemlock-Rust-Mites-12-768x576.jpg 768w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/fff9-Hemlock-Rust-Mites-12.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-701\" class=\"wp-caption-text\">Photo: Steven K. Rettke, Rutgers Cooperative Extension<\/figcaption><\/figure>\n<div class=\"mceTemp\"><\/div>\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>Hemlock Rust Mite (Nalepella tsugifoliae) GDD Window (base 50): 7-450 (7-22: active mites emerge) Overview: Tiny, wormlike insects that require magnification to be seen\u200b In the spring, scout using a &hellip; <a href=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/hemlock-rust-mite\/\" class=\"\">Read More<\/a><\/p>\n","protected":false},"author":3407,"featured_media":700,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15],"tags":[],"class_list":["post-698","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>Hemlock Rust 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\/hemlock-rust-mite\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hemlock Rust Mite - Nursery IPM\" \/>\n<meta property=\"og:description\" content=\"Hemlock Rust Mite (Nalepella tsugifoliae) GDD Window (base 50): 7-450 (7-22: active mites emerge) Overview: Tiny, wormlike insects that require magnification to be seen\u200b In the spring, scout using a &hellip; Read More\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/hemlock-rust-mite\/\" \/>\n<meta property=\"og:site_name\" content=\"Nursery IPM\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-08T18:46:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-27T19:45:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/06\/m2-Hemlock-Rust-Mite-2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"758\" \/>\n\t<meta property=\"og:image:height\" content=\"592\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Erin O. 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