{"id":425,"date":"2025-11-17T20:12:51","date_gmt":"2025-11-17T20:12:51","guid":{"rendered":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/?p=425"},"modified":"2025-11-17T20:12:53","modified_gmt":"2025-11-17T20:12:53","slug":"pest-alert-japanese-beetle-in-hazelnuts","status":"publish","type":"post","link":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/","title":{"rendered":"Pest Alert: Japanese beetle in hazelnuts"},"content":{"rendered":"<div class=\"wp-block-post-date\"><time datetime=\"2025-11-17T20:12:51+00:00\">November 17, 2025<\/time><\/div>\n\n<div class=\"wp-block-post-author\"><div class=\"wp-block-post-author__avatar\"><img alt='' src='https:\/\/secure.gravatar.com\/avatar\/9f5a51f287413adad84e67a832e9e523a4c0aef88968d0403087af52369b6cb5?s=48&#038;d=mm&#038;r=g' srcset='https:\/\/secure.gravatar.com\/avatar\/9f5a51f287413adad84e67a832e9e523a4c0aef88968d0403087af52369b6cb5?s=96&#038;d=mm&#038;r=g 2x' class='avatar avatar-48 photo' height='48' width='48' \/><\/div><div class=\"wp-block-post-author__content\"><p class=\"wp-block-post-author__name\">Nik Wiman<\/p><\/div><\/div>\n\n\n<p>The Japanese beetle <em>Popillia japonica <\/em>(Newman) is a scarab beetle (Coleoptera: Scarabaeidae) from Japan that has become an invasive pest in the US where it was first introduced in 1916. This insect, although very beautiful, is a major threat to Oregon specialty crop industries (Fig. 1). The larvae (grubs) feed on roots of grasses, but they can inhabit most soils, and adult beetles are voracious consumers of plant canopies. They feed on more than 300 plants including hazelnuts. \u00a0An Oregon Department of Agriculture (ODA) <a href=\"https:\/\/www.oregon.gov\/oda\/Documents\/Publications\/IPPM\/JapaneseBeetleEconomicRiskAssessment.pdf\">economic risk analysis<\/a> , which omitted hazelnuts, estimated that the damage to Oregon specialty crops could be $35 million per year. The actual impacts could be much higher including hazelnuts and accounting for inflation.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Situation<\/h2>\n\n\n\n<p>Japanese beetle is now established across the eastern US, Midwest, and is <a href=\"https:\/\/www.aphis.usda.gov\/sites\/default\/files\/jb-distribution-map.pdf\">increasing in western states<\/a>.\u00a0 In Oregon, a population detected in 2016 initiated an <a href=\"https:\/\/www.oregon.gov\/oda\/ippm\/survey-treatment\/Pages\/japanese-beetle.aspx\">eradication effort<\/a> by the Oregon Department of Agriculture that began in 2017 and lasted until 2025. These efforts successfully reduced the populations of the beetle in Washington County, <a href=\"https:\/\/content.govdelivery.com\/accounts\/ORODA\/bulletins\/3f48956\">but fell just shy of complete eradication<\/a>. Unfortunately, the Oregon legislature <a href=\"https:\/\/bendbulletin.com\/2025\/10\/07\/oregon-discontinues-japanese-beetle-eradication-efforts\/\">declined to fund the program for 2026<\/a>, and this may leave Oregon\u2019s specialty crop industries more vulnerable than ever to this pest. Without the eradication campaign, Japanese beetle will likely spread and establish in commercial agriculture. Unfortunately, the Willamette Valley is a highly suitable environment for this pest.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"189\" height=\"174\" src=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image.png\" alt=\"\" class=\"wp-image-427\" style=\"width:260px;height:auto\" \/><figcaption class=\"wp-element-caption\">Figure 1. Japanese beetle adult (A) and grub (B). The adults are about 0.3-0.4 in long (8-11 mm) with a metallic green body, coppery elytra (wing covers) and 5 tufts of white hairs on each side of the abdomen. Grubs live in the soil and are \u201cC\u201d shaped. Reprinted from <a href=\"https:\/\/extension.oregonstate.edu\/catalog\/pub\/em9158-s\">OSU EM 9158 Japanese Beetles in Oregon<\/a>. Illustration by Erik Simmons.\u00a0\u00a0<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<h2 class=\"wp-block-heading\">Impacts<\/h2>\n\n\n\n<p>For a preview of what the impacts may be for the hazelnut industry, we can look to two places in the world where there are hazelnuts grown and the Japanese beetle is established. In Europe, Japanese beetle is established in the Piedmont region of Italy, which is famous for hazelnut production. And in the midwestern US, native and hybrid hazelnuts are affected.  The main impact of Japanese beetle in hazelnut orchards will be <strong>severe defoliation of the tree canopy <\/strong>(Fig. 2). While this is not a direct effect on yield, the loss of leaves will be a setback for tree health and could push stressed trees over the edge. Young, establishing trees may be particularly affected. There are several insecticides currently registered in hazelnuts that can be used against this pest. Unfortunately, these tend to be broad spectrum products with potential to disrupt biological control. Management of key pests such as filbertworm and BMSB should help manage Japanese beetle. We will need some research to determine how best to integrate this pest into our overall integrated pest management strategy, and to develop sustainable approaches and new registrations.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"468\" height=\"214\" src=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image-1.png\" alt=\"\" class=\"wp-image-428\" style=\"width:658px;height:auto\" srcset=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image-1.png 468w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image-1-300x137.png 300w\" sizes=\"auto, (max-width: 468px) 100vw, 468px\" \/><figcaption class=\"wp-element-caption\">Figure 2. Japanese beetle damage to hazelnuts. The adults can rapidly skeletonize leaves and defoliate the canopy. Photos from <a href=\"https:\/\/riverbendhazelnuts.com\/\">Riverbend Hazelnuts<\/a>, used by permission.<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Resources<\/h2>\n\n\n\n<p>National Invasive Species Information Center: <a href=\"https:\/\/www.invasivespeciesinfo.gov\/terrestrial\/invertebrates\/japanese-beetle\">https:\/\/www.invasivespeciesinfo.gov\/terrestrial\/invertebrates\/japanese-beetle<\/a><\/p>\n\n\n\n<p>Oregon Department of Agriculture Japanese Beetle Project: <a href=\"https:\/\/www.oregon.gov\/oda\/ippm\/survey-treatment\/Pages\/japanese-beetle.aspx\">https:\/\/www.oregon.gov\/oda\/ippm\/survey-treatment\/Pages\/japanese-beetle.aspx<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Japanese beetle Popillia japonica (Newman) is a scarab beetle (Coleoptera: Scarabaeidae) from Japan that has become an invasive pest in the US where it was first introduced in 1916. This insect, although very beautiful, is a major threat to &hellip; <a href=\"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":8267,"featured_media":428,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[9,67,68,66],"class_list":["post-425","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-hazelnut","tag-invasive","tag-japanese-beetle","tag-pests"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pest Alert: Japanese beetle in hazelnuts - Hazelnut Field Notes<\/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:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pest Alert: Japanese beetle in hazelnuts - Hazelnut Field Notes\" \/>\n<meta property=\"og:description\" content=\"The Japanese beetle Popillia japonica (Newman) is a scarab beetle (Coleoptera: Scarabaeidae) from Japan that has become an invasive pest in the US where it was first introduced in 1916. This insect, although very beautiful, is a major threat to &hellip; Continue reading &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/\" \/>\n<meta property=\"og:site_name\" content=\"Hazelnut Field Notes\" \/>\n<meta property=\"article:published_time\" content=\"2025-11-17T20:12:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-17T20:12:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"468\" \/>\n\t<meta property=\"og:image:height\" content=\"214\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Nik Wiman\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nik Wiman\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/\"},\"author\":{\"name\":\"Nik Wiman\",\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/#\\\/schema\\\/person\\\/ff0e6789ecab0355608a8bf4a9923f76\"},\"headline\":\"Pest Alert: Japanese beetle in hazelnuts\",\"datePublished\":\"2025-11-17T20:12:51+00:00\",\"dateModified\":\"2025-11-17T20:12:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/\"},\"wordCount\":527,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/osu-wams-blogs-uploads.s3.amazonaws.com\\\/blogs.dir\\\/5787\\\/files\\\/2025\\\/11\\\/image-1.png\",\"keywords\":[\"hazelnut\",\"invasive\",\"japanese beetle\",\"pests\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/\",\"url\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/\",\"name\":\"Pest Alert: Japanese beetle in hazelnuts - Hazelnut Field Notes\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/osu-wams-blogs-uploads.s3.amazonaws.com\\\/blogs.dir\\\/5787\\\/files\\\/2025\\\/11\\\/image-1.png\",\"datePublished\":\"2025-11-17T20:12:51+00:00\",\"dateModified\":\"2025-11-17T20:12:53+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/#primaryimage\",\"url\":\"https:\\\/\\\/osu-wams-blogs-uploads.s3.amazonaws.com\\\/blogs.dir\\\/5787\\\/files\\\/2025\\\/11\\\/image-1.png\",\"contentUrl\":\"https:\\\/\\\/osu-wams-blogs-uploads.s3.amazonaws.com\\\/blogs.dir\\\/5787\\\/files\\\/2025\\\/11\\\/image-1.png\",\"width\":468,\"height\":214},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/pest-alert-japanese-beetle-in-hazelnuts\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pest Alert: Japanese beetle in hazelnuts\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/#website\",\"url\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/\",\"name\":\"Hazelnut Field Notes\",\"description\":\"Observations from the orchard\",\"publisher\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/#organization\",\"name\":\"Hazelnut Field Notes\",\"url\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/osu-wams-blogs-uploads.s3.amazonaws.com\\\/blogs.dir\\\/5787\\\/files\\\/2022\\\/07\\\/page-header-with-labels-wide-1.png\",\"contentUrl\":\"https:\\\/\\\/osu-wams-blogs-uploads.s3.amazonaws.com\\\/blogs.dir\\\/5787\\\/files\\\/2022\\\/07\\\/page-header-with-labels-wide-1.png\",\"width\":3000,\"height\":450,\"caption\":\"Hazelnut Field Notes\"},\"image\":{\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/#\\\/schema\\\/person\\\/ff0e6789ecab0355608a8bf4a9923f76\",\"name\":\"Nik Wiman\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/9f5a51f287413adad84e67a832e9e523a4c0aef88968d0403087af52369b6cb5?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/9f5a51f287413adad84e67a832e9e523a4c0aef88968d0403087af52369b6cb5?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/9f5a51f287413adad84e67a832e9e523a4c0aef88968d0403087af52369b6cb5?s=96&d=mm&r=g\",\"caption\":\"Nik Wiman\"},\"url\":\"https:\\\/\\\/blogs.oregonstate.edu\\\/hazelnuts\\\/author\\\/wimann\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Pest Alert: Japanese beetle in hazelnuts - Hazelnut Field Notes","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/","og_locale":"en_US","og_type":"article","og_title":"Pest Alert: Japanese beetle in hazelnuts - Hazelnut Field Notes","og_description":"The Japanese beetle Popillia japonica (Newman) is a scarab beetle (Coleoptera: Scarabaeidae) from Japan that has become an invasive pest in the US where it was first introduced in 1916. This insect, although very beautiful, is a major threat to &hellip; Continue reading &rarr;","og_url":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/","og_site_name":"Hazelnut Field Notes","article_published_time":"2025-11-17T20:12:51+00:00","article_modified_time":"2025-11-17T20:12:53+00:00","og_image":[{"width":468,"height":214,"url":"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image-1.png","type":"image\/png"}],"author":"Nik Wiman","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Nik Wiman","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/#article","isPartOf":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/"},"author":{"name":"Nik Wiman","@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/#\/schema\/person\/ff0e6789ecab0355608a8bf4a9923f76"},"headline":"Pest Alert: Japanese beetle in hazelnuts","datePublished":"2025-11-17T20:12:51+00:00","dateModified":"2025-11-17T20:12:53+00:00","mainEntityOfPage":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/"},"wordCount":527,"commentCount":0,"publisher":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/#organization"},"image":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/#primaryimage"},"thumbnailUrl":"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image-1.png","keywords":["hazelnut","invasive","japanese beetle","pests"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/","url":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/","name":"Pest Alert: Japanese beetle in hazelnuts - Hazelnut Field Notes","isPartOf":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/#primaryimage"},"image":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/#primaryimage"},"thumbnailUrl":"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image-1.png","datePublished":"2025-11-17T20:12:51+00:00","dateModified":"2025-11-17T20:12:53+00:00","breadcrumb":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/#primaryimage","url":"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image-1.png","contentUrl":"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2025\/11\/image-1.png","width":468,"height":214},{"@type":"BreadcrumbList","@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/pest-alert-japanese-beetle-in-hazelnuts\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/"},{"@type":"ListItem","position":2,"name":"Pest Alert: Japanese beetle in hazelnuts"}]},{"@type":"WebSite","@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/#website","url":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/","name":"Hazelnut Field Notes","description":"Observations from the orchard","publisher":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/#organization","name":"Hazelnut Field Notes","url":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/#\/schema\/logo\/image\/","url":"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/page-header-with-labels-wide-1.png","contentUrl":"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/page-header-with-labels-wide-1.png","width":3000,"height":450,"caption":"Hazelnut Field Notes"},"image":{"@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/#\/schema\/person\/ff0e6789ecab0355608a8bf4a9923f76","name":"Nik Wiman","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/9f5a51f287413adad84e67a832e9e523a4c0aef88968d0403087af52369b6cb5?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/9f5a51f287413adad84e67a832e9e523a4c0aef88968d0403087af52369b6cb5?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/9f5a51f287413adad84e67a832e9e523a4c0aef88968d0403087af52369b6cb5?s=96&d=mm&r=g","caption":"Nik Wiman"},"url":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/author\/wimann\/"}]}},"_links":{"self":[{"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/posts\/425","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/users\/8267"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/comments?post=425"}],"version-history":[{"count":3,"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/posts\/425\/revisions"}],"predecessor-version":[{"id":431,"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/posts\/425\/revisions\/431"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/media\/428"}],"wp:attachment":[{"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/media?parent=425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/categories?post=425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/wp-json\/wp\/v2\/tags?post=425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}