{"id":1108,"date":"2025-06-24T16:45:55","date_gmt":"2025-06-24T16:45:55","guid":{"rendered":"https:\/\/sites.rutgers.edu\/nursery-ipm\/?p=1108"},"modified":"2025-08-27T19:36:15","modified_gmt":"2025-08-27T19:36:15","slug":"japanese-beetle","status":"publish","type":"post","link":"https:\/\/sites.rutgers.edu\/nursery-ipm\/japanese-beetle\/","title":{"rendered":"Japanese Beetle"},"content":{"rendered":"<h2><strong>Japanese Beetle (<em>Popillia japonica<\/em>)<\/strong><\/h2>\n<h4><strong>GDD Window (base 50): 1029-2154<\/strong><\/h4>\n<h5><\/h5>\n<h4><strong>Overview:<\/strong>\u200b\u200b\u200b<\/h4>\n<ul>\n<li>Mate, then feed and lay eggs for six weeks\u00a0\u00a0\u200b<\/li>\n<li>Adults appear on hosts from late June to early August\u00a0\u00a0\u200b<\/li>\n<li>Attracted to plant-feeding damage and often cluster on one particular plant\u00a0\u00a0\u200b<\/li>\n<li>Adults are \u00bd&#8221; long with a metallic green body and coppery-brown wing covers, white tufts of hair along the sides of their abdomens\u00a0\u00a0\u200b<\/li>\n<li>Larvae are white with brown heads, C-shaped, and feed on plant roots\u00a0\u200b<\/li>\n<li>One-year long life cycle\u00a0\u200b<\/li>\n<li>Eggs are laid in the soil\u200b<\/li>\n<li>Cause skeletonized leaves, brown or pale patches in lawns\u00a0\u200b<\/li>\n<li>Beetles are mostly present on sunny days\u00a0\u00a0\u200b<\/li>\n<li>Can\u00a0lead\u00a0to\u00a0increased\u00a0bird\u00a0activity\u00a0locally \u00a0\u200b<\/li>\n<li>Host\u00a0plants:\u00a0roses, grapes, linden &amp; birch trees, and fruit\u00a0 trees (apples, cherries, peaches) &amp; crabapples\u200b\n<ul>\n<li>Larvae feed on roots of turfgrass and ornamentals\u00a0\u200b<\/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=\"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\"> birds, (starlings, robins,\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">crows), mammals (raccoons, skunks), ants, <\/span><span data-usefontface=\"false\" data-contrast=\"none\">spiders, assassin bugs, parasitoids (<\/span><i><span data-usefontface=\"false\" data-contrast=\"none\">Tiphia <\/span><\/i><i><span data-usefontface=\"false\" data-contrast=\"none\">vernalis<\/span><\/i><span data-usefontface=\"false\" data-contrast=\"none\">,\u00a0<\/span><i><span data-usefontface=\"false\" data-contrast=\"none\">Istocheta<\/span><\/i><i><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0<\/span><\/i><i><span data-usefontface=\"false\" data-contrast=\"none\">aldrichi<\/span><\/i><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=\"3\" data-aria-level=\"2\"><span data-usefontface=\"false\" data-contrast=\"none\">Companion planting: catnip, chives, garlic<\/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\">Adults are sluggish on cool\/rainy days or <\/span><span data-usefontface=\"false\" data-contrast=\"none\">early in the morning, and can be handpicked <\/span><span data-usefontface=\"false\" data-contrast=\"none\">or knocked into a drop cloth<\/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\">Choose plants that are less susceptible <\/span><span data-usefontface=\"false\" data-contrast=\"none\">(boxwood, dogwood, magnolias)<\/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\">Take care of your lawn by mowing, fertilizing, <\/span><span data-usefontface=\"false\" data-contrast=\"none\">and watering to prevent grubs<\/span>\u200b<\/li>\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\">Reduce plant stress<\/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\">Use pheromone traps<\/span>\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\">Carbamates [1A]: carbaryl<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Pyrethroids [3]: &#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\">Systemic insecticides:<\/span><\/b>\u200b\n<ul>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Neonicotinoids [4A]: Acetamiprid, <\/span><span data-usefontface=\"false\" data-contrast=\"none\">imidacloprid, dinotefuran<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Diamides [28]: Chlorantraniliprole<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Organophosphate [1B]:\u00a0<\/span><span data-usefontface=\"false\" data-contrast=\"none\">acephate<\/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\">Most will harm non-target species<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5><strong>Biorationals:<\/strong><\/h5>\n<ul>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Horticultural oil \/ Soaps\u00a0<\/span>\u200b\n<ul>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Neem oil<\/span>\u200b<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Azadirachtin<\/span><span data-usefontface=\"false\" data-contrast=\"none\">\u00a0[UN]\u00a0<\/span>\u200b<\/li>\n<\/ul>\n<\/li>\n<li><span data-usefontface=\"false\" data-contrast=\"none\">Milky spore bacteria (targets grubs)<\/span><\/li>\n<li>Diamides [28]: Chlorantraniliprole \u200b<\/li>\n<\/ul>\n<div class=\"mceTemp\"><\/div>\n<h4><strong>Resources:<\/strong><\/h4>\n<p><a class=\"btn btn-primary\" href=\"https:\/\/entomology.rutgers.edu\/history\/japanese-beetle-quarantine.html\" target=\"_blank\" rel=\"noopener\">Japanese Beetle Quarantine &#8211; RU Entomology<\/a><\/p>\n<p><a class=\"btn btn-primary\" href=\"https:\/\/entomology.rutgers.edu\/history\/japanese-beetle-suppression.html\" target=\"_blank\" rel=\"noopener\">Japanese Beetle Suppression &#8211; RU Entomology<\/a><\/p>\n<p><a class=\"btn btn-primary\" href=\"https:\/\/plant-pest-advisory.rutgers.edu\/landscape-pest-notes-for-july-2023\/\" target=\"_blank\" rel=\"noopener\">Landscape Pest Notes for July 2023 &#8211; PPA<\/a><\/p>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_1313\" aria-describedby=\"caption-attachment-1313\" style=\"width: 646px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-1313\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/Screenshot-2025-08-07-121824-300x155.png\" alt=\"\" width=\"646\" height=\"334\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/Screenshot-2025-08-07-121824-300x155.png 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/Screenshot-2025-08-07-121824.png 558w\" sizes=\"(max-width: 646px) 100vw, 646px\" \/><figcaption id=\"caption-attachment-1313\" class=\"wp-caption-text\">Photo: Ohio State University<\/figcaption><\/figure>\n<div class=\"mceTemp\"><\/div>\n<figure id=\"attachment_1111\" aria-describedby=\"caption-attachment-1111\" style=\"width: 207px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1111\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/japanese-beetle-trap-1-1-207x300.jpg\" alt=\"\" width=\"207\" height=\"300\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/japanese-beetle-trap-1-1-207x300.jpg 207w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/japanese-beetle-trap-1-1.jpg 252w\" sizes=\"(max-width: 207px) 100vw, 207px\" \/><figcaption id=\"caption-attachment-1111\" class=\"wp-caption-text\">Japanese beetle trap. Photo: Steven K. Rettke, RCE<\/figcaption><\/figure>\n<figure id=\"attachment_1112\" aria-describedby=\"caption-attachment-1112\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1112\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-1-Japanese-beetles-2-Leaf-skeletonization-1-300x228.jpg\" alt=\"\" width=\"300\" height=\"228\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-1-Japanese-beetles-2-Leaf-skeletonization-1-300x228.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-1-Japanese-beetles-2-Leaf-skeletonization-1-768x583.jpg 768w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-1-Japanese-beetles-2-Leaf-skeletonization-1.jpg 791w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1112\" class=\"wp-caption-text\">Leaf Skeletonization. Photo: Steven K. Rettke, RCE<\/figcaption><\/figure>\n<figure id=\"attachment_1113\" aria-describedby=\"caption-attachment-1113\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1113\" src=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-1-Japanese-Beetles-Mating-swarm-300x200.jpg\" alt=\"\" width=\"300\" height=\"200\" srcset=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-1-Japanese-Beetles-Mating-swarm-300x200.jpg 300w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-1-Japanese-Beetles-Mating-swarm-768x512.jpg 768w, https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-1-Japanese-Beetles-Mating-swarm.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-1113\" class=\"wp-caption-text\">Mating swarm. Photo: Steven K. Rettke, RCE<\/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>Japanese Beetle (Popillia japonica) GDD Window (base 50): 1029-2154 Overview:\u200b\u200b\u200b Mate, then feed and lay eggs for six weeks\u00a0\u00a0\u200b Adults appear on hosts from late June to early August\u00a0\u00a0\u200b Attracted &hellip; <a href=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/japanese-beetle\/\" class=\"\">Read More<\/a><\/p>\n","protected":false},"author":3407,"featured_media":1114,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15],"tags":[],"class_list":["post-1108","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>Japanese Beetle - 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\/japanese-beetle\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Japanese Beetle - Nursery IPM\" \/>\n<meta property=\"og:description\" content=\"Japanese Beetle (Popillia japonica) GDD Window (base 50): 1029-2154 Overview:\u200b\u200b\u200b Mate, then feed and lay eggs for six weeks\u00a0\u00a0\u200b Adults appear on hosts from late June to early August\u00a0\u00a0\u200b Attracted &hellip; Read More\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/japanese-beetle\/\" \/>\n<meta property=\"og:site_name\" content=\"Nursery IPM\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-24T16:45:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-27T19:36:15+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sites.rutgers.edu\/nursery-ipm\/wp-content\/uploads\/sites\/1396\/2025\/07\/June-24-1-Japanese-Beetle-Adult-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1920\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Erin O. 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