{"id":1148,"date":"2025-06-24T17:40:37","date_gmt":"2025-06-24T17:40:37","guid":{"rendered":"https:\/\/sites.rutgers.edu\/nursery-ipm\/?p=1148"},"modified":"2025-08-27T19:35:25","modified_gmt":"2025-08-27T19:35:25","slug":"taxus-mealybug","status":"publish","type":"post","link":"https:\/\/sites.rutgers.edu\/nursery-ipm\/taxus-mealybug\/","title":{"rendered":"Taxus Mealybug"},"content":{"rendered":"<h2><strong>Taxus Mealybug (<em>Dysmicoccus wistariae<\/em>)<\/strong><\/h2>\n<h4><strong>GDD Window (base 50): 246-618<\/strong><\/h4>\n<h5><\/h5>\n<h4><strong>Overview:<\/strong>\u200b\u200b\u200b<\/h4>\n<ul>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"2\" data-aria-level=\"1\">Considered a type of scale insect<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"2\" data-aria-level=\"1\">Overwinter\u00a0as\u00a01st\u00a0instar\u00a0nymphs\u00a0(soft\u00a0scales overwinter\u00a0as\u00a02nd\u00a0instar\u00a0nymphs)\u200b<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"3\" data-aria-level=\"1\">Adults\u00a0are 1\/8&#8243; long\u00a0\u00a0and covered with white cottony waxy\u00a0filaments\u00a0\u200bthat\u00a0makes them\u00a0difficult to control\u200b<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"5\" data-aria-level=\"1\">White\u00a0adults and crawlers feed in clusters at nodes and branch forks\u00a0\u200b<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"6\" data-aria-level=\"1\">Give\u00a0birth to live young in the early summer\u200b<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"7\" data-aria-level=\"1\">Feed\u00a0within Phloem (vascular tissues)\u200b<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"8\" data-aria-level=\"1\">Produce\u00a0honeydew that later produces black sooty mold\u200b<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"9\" data-aria-level=\"1\">Two\u00a0to three generations per year (like many armored scale species)\u200b<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"10\" data-aria-level=\"1\">Insects\u00a0become more abundant by midsummer\u00a0\u200b<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"11\" data-aria-level=\"1\">Feeding\u00a0causes yellowing, stunted growth, and dieback of branches\u200b<\/li>\n<li data-charcodes=\"45\" data-font=\"Calibri,Sans-Serif\" data-buautonum=\"8\" data-margin=\"540\" data-aria-posinset=\"12\" data-aria-level=\"1\">Lead to sparse looking plants that have lost foliage, with remaining needles\u00a0caked with honeydew &amp; black sooty mold\u200b<\/li>\n<li><strong><span class=\"TextRun Underlined SCXP154666933 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SingleUnderline SCXP154666933 BCX0\">Host plants<\/span><\/span><\/strong><span class=\"TextRun SCXP154666933 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP154666933 BCX0\"><strong>:<\/strong>\u00a0<\/span><\/span><span class=\"TextRun Underlined SCXP154666933 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SingleUnderline SCXP154666933 BCX0\">Yew<\/span><\/span><span class=\"TextRun SCXP154666933 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP154666933 BCX0\">,\u00a0<\/span><\/span><em><span class=\"TextRun Underlined SCXP154666933 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SingleUnderline SCXP154666933 BCX0\">Rhododendron<\/span><\/span><\/em><span class=\"TextRun SCXP154666933 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP154666933 BCX0\">,\u00a0<\/span><\/span><span class=\"TextRun SCXP154666933 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP154666933 BCX0\">dogwood, maple,\u00a0<\/span><\/span><em><span class=\"TextRun SCXP154666933 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-usefontface=\"false\" data-contrast=\"none\"><span class=\"NormalTextRun SCXP154666933 BCX0\">Prunus<\/span><\/span><\/em><\/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><i><span data-usefontface=\"false\" data-contrast=\"none\">Hymenoptera<\/span><\/i><span data-usefontface=\"false\" data-contrast=\"none\"> parasites, lacewings,\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">syrphid flies, lady beetles\u00a0\u00a0<\/span>\u200b<\/li>\n<li>Control ant populations\u00a0(feed on honeydew &amp; fight-off predators)\u200b<\/li>\n<li>Reduce plant stress\u200b<\/li>\n<li>Prune out and destroy infested branches or throw plant away\u200b<\/li>\n<li>Scout in areas with dense foliage\u00a0\u200b<\/li>\n<\/ul>\n<h5><strong>Materials:<\/strong><\/h5>\n<ul>\n<li><b><span data-usefontface=\"false\" data-contrast=\"none\">Contact insecticides:<\/span><\/b>\u200b\n<ul>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Organophosphates [1B]:\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">acephate<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Carbamates [1A]: carbaryl<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Pyrethroids [3A]: &#8211;<\/span><span data-usefontface=\"false\" data-contrast=\"none\">thrins<\/span>\u200b<\/li>\n<\/ul>\n<\/li>\n<li><b><span data-usefontface=\"false\" data-contrast=\"none\">Considerations:<\/span><\/b>\u200b\n<ul>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Will harm non-target species<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Timing of treatment is essential<\/span>\u200b<\/li>\n<\/ul>\n<\/li>\n<li><b><span data-usefontface=\"false\" data-contrast=\"none\">Systemic insecticides:<\/span><\/b>\u200b\n<ul>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Neonicotinoids\u00a0are\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">not<\/span><span data-usefontface=\"false\" data-contrast=\"none\"> always effective\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">(drench or bark sprays\u00a0<\/span><i><span data-usefontface=\"false\" data-contrast=\"none\">may help<\/span><\/i><span data-usefontface=\"false\" data-contrast=\"none\">)\u00a0<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Acetamiprid is a reduced risk <\/span><span data-usefontface=\"false\" data-contrast=\"none\">neonicotinoid (spray only)<\/span>\u200b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5><strong>Biorationals:<\/strong><\/h5>\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\">Insecticidal soap\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\">Horticultural oils\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\">Insect growth regulators:\u200b\n<ul>\n<li data-charcodes=\"167\" data-font=\"Wingdings,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1980\" data-aria-posinset=\"5\" data-aria-level=\"3\">Pyriproxyfen\u00a0[7A]\u200b<\/li>\n<li data-charcodes=\"167\" data-font=\"Wingdings,Sans-Serif\" data-buautonum=\"8\" data-margin=\"1980\" data-aria-posinset=\"6\" data-aria-level=\"3\">Buprofezin\u00a0[16]\u200b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<div class=\"mceTemp\"><\/div>\n<figure id=\"attachment_1149\" aria-describedby=\"caption-attachment-1149\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1149 size-medium\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-2-Scales-Mealybug-Taxus-300x192.jpg\" alt=\"\" width=\"300\" height=\"192\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-2-Scales-Mealybug-Taxus-300x192.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-2-Scales-Mealybug-Taxus-768x491.jpg 768w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-2-Scales-Mealybug-Taxus.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1149\" class=\"wp-caption-text\">Taxus Mealybug body has 15 to 17 pairs of waxy tuffs with the last pair about one-fourth the length of the body. (Photo Credit: Steven K. Rettke, Rutgers Coop. Ext.)<\/figcaption><\/figure>\n<figure id=\"attachment_1150\" aria-describedby=\"caption-attachment-1150\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1150\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/aa16-Mealybugs-Plant-Stunting-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/aa16-Mealybugs-Plant-Stunting-300x225.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/aa16-Mealybugs-Plant-Stunting-768x576.jpg 768w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/aa16-Mealybugs-Plant-Stunting.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1150\" class=\"wp-caption-text\">The Taxus Mealybug infested plant on right shows obvious stunting &amp; discolored symptoms. Although this insect prefers yew, they also can be found on Rhododendron, dogwood, maple &amp; Prunus species. (Photo Credit: Steven K. Rettke, Rutgers Coop. Ext.)<\/figcaption><\/figure>\n<div class=\"mceTemp\"><\/div>\n<div class=\"mceTemp\"><\/div>\n<div class=\"mceTemp\">\n<p>&nbsp;<\/p>\n<\/div>\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>Taxus Mealybug (Dysmicoccus wistariae) GDD Window (base 50): 246-618 Overview:\u200b\u200b\u200b Considered a type of scale insect Overwinter\u00a0as\u00a01st\u00a0instar\u00a0nymphs\u00a0(soft\u00a0scales overwinter\u00a0as\u00a02nd\u00a0instar\u00a0nymphs)\u200b Adults\u00a0are 1\/8&#8243; long\u00a0\u00a0and covered with white cottony waxy\u00a0filaments\u00a0\u200bthat\u00a0makes them\u00a0difficult to control\u200b White\u00a0adults &hellip; <a href=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/taxus-mealybug\/\" class=\"\">Read More<\/a><\/p>\n","protected":false},"author":3407,"featured_media":1149,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15],"tags":[],"class_list":["post-1148","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>Taxus Mealybug - 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\/taxus-mealybug\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Taxus Mealybug - Nursery IPM\" \/>\n<meta property=\"og:description\" content=\"Taxus Mealybug (Dysmicoccus wistariae) GDD Window (base 50): 246-618 Overview:\u200b\u200b\u200b Considered a type of scale insect Overwinter\u00a0as\u00a01st\u00a0instar\u00a0nymphs\u00a0(soft\u00a0scales overwinter\u00a0as\u00a02nd\u00a0instar\u00a0nymphs)\u200b Adults\u00a0are 1\/8&#8243; long\u00a0\u00a0and covered with white cottony waxy\u00a0filaments\u00a0\u200bthat\u00a0makes them\u00a0difficult to control\u200b White\u00a0adults &hellip; Read More\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/taxus-mealybug\/\" \/>\n<meta property=\"og:site_name\" content=\"Nursery IPM\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-24T17:40:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-27T19:35:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-2-Scales-Mealybug-Taxus.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"511\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Erin O. 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