{"id":130,"date":"2022-07-20T06:05:08","date_gmt":"2022-07-20T06:05:08","guid":{"rendered":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/?p=130"},"modified":"2022-07-20T17:49:53","modified_gmt":"2022-07-20T17:49:53","slug":"bmsb-egg-masses-and-nymphs-now-in-orchards","status":"publish","type":"post","link":"https:\/\/blogs.oregonstate.edu\/hazelnuts\/bmsb-egg-masses-and-nymphs-now-in-orchards\/","title":{"rendered":"BMSB egg masses and nymphs now in orchards"},"content":{"rendered":"<div class=\"wp-block-site-logo\"><a href=\"https:\/\/blogs.oregonstate.edu\/hazelnuts\/\" class=\"custom-logo-link\" rel=\"home\"><img loading=\"lazy\" decoding=\"async\" width=\"672\" height=\"100\" src=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/page-header-with-labels-wide-1.png\" class=\"custom-logo\" alt=\"Hazelnut Field Notes\" srcset=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/page-header-with-labels-wide-1.png 3000w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/page-header-with-labels-wide-1-300x45.png 300w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/page-header-with-labels-wide-1-1024x154.png 1024w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/page-header-with-labels-wide-1-768x115.png 768w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/page-header-with-labels-wide-1-1536x230.png 1536w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/page-header-with-labels-wide-1-2048x307.png 2048w\" sizes=\"auto, (max-width: 672px) 100vw, 672px\" \/><\/a><\/div>\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\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<div class=\"wp-block-post-date\"><time datetime=\"2022-07-20T06:05:08+00:00\">July 20, 2022<\/time><\/div>\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/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\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/IMG_4224-768x1024.png\" alt=\"\" class=\"wp-image-133\" srcset=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/IMG_4224-768x1024.png 768w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/IMG_4224-225x300.png 225w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/IMG_4224-1152x1536.png 1152w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/IMG_4224-1536x2048.png 1536w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption>BMSB egg mass on young &#8216;Jefferson&#8217; tree near Aurora, OR. Photo: Kody Transue<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"791\" height=\"1024\" src=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/em9164-791x1024.png\" alt=\"\" class=\"wp-image-136\" srcset=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/em9164-791x1024.png 791w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/em9164-232x300.png 232w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/em9164-768x994.png 768w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/em9164-1187x1536.png 1187w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/em9164-1583x2048.png 1583w\" sizes=\"auto, (max-width: 791px) 100vw, 791px\" \/><figcaption>EM9164 from the OSU Extension catalog describing  how to determine if BMSB egg masses are parasitized by <em>Trissolcus japonicus.<\/em><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/BMSB-2nd-instar-768x1024.jpg\" alt=\"\" class=\"wp-image-151\" srcset=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/BMSB-2nd-instar-768x1024.jpg 768w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/BMSB-2nd-instar-225x300.jpg 225w, https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/BMSB-2nd-instar.jpg 960w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption>BMSB 2nd instar on nuts. These small nymphs are not damaging but as they mature they are increasingly able to penetrate the kernel. Photo: NIk Wiman<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>Brown marmorated stink bug (BMSB, <em>Halyomorpha halys<\/em>) is a direct pest of hazelnuts across its invaded range worldwide including in the Pacific Northwest. Our program began redistribution efforts of the biological control agent <em>Trissolcus japonicus<\/em> soon after it was discovered attacking egg masses of BMSB in Portland in 2015. Since our initial efforts, the ODA has begun ramping up the wasp releases and they are putting out some impressive numbers. Our sampling is showing that at many sites evidence of the wasp can be found year after year, suggesting it is well-established in some but not all areas of the Willamette Valley and more broadly across Oregon.<\/p>\n\n\n\n<p>The very first BMSB egg mass that I found this season was parasitized by the wasp &#8211; a very good sign. We have a lot of information about <a href=\"https:\/\/catalog.extension.oregonstate.edu\/em9164\">this wasp posted <\/a>and we continue to encourage <a href=\"https:\/\/www.eddmaps.org\/reportform\/?formid=53\">reporting of parasitized egg masses<\/a>. There is little doubt that successful biological control of BMSB is the best option for management for this pest that is found across the landscape.<\/p>\n\n\n\n<p>Regardless of the improving levels of biological control, this insect remains a threat to the hazelnut industry. It is likely that we will continue to experience kernel damage from this pest into the future, though it seems the populations are highly variable year to year. Last year (2021 growing season) the BMSB populations were low and processors reported minimal damage. However, in the previous year (2020), there was considerable damage. The environment has a lot to do with these population fluctuations. This pest is also highly variable spatially. Many orchards get no pressure.<\/p>\n\n\n\n<p>We have been trapping adults all spring and I have seen adults in the orchard on several occasions. Last week I saw second instar nymphs in the orchard on nut clusters. This Monday the 18 of July we encountered an egg mass that had just hatched in an orchard where we have a filbertworm trial.<\/p>\n\n\n\n<p>Previous work has shown that hazelnut damage increases at the time the nymph population increases. So it is a good time to scout for BMSB. We hope to further refine trap captures help growers determine if management is necessary.<\/p>\n\n\n\n<p><a href=\"https:\/\/airtable.com\/app3Qlpt3o7UgrurV\/tblDyxo5xI6RXTwc9\/viwoYeM8bV0e5L4AQ\/recyLyZ81HRCo6z82?blocks=hide\">BMSB management info is found in EM8328, the Hazelnut Pest Management Guide.<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n<\/div>\n<\/div>\n\n\n<figure class=\"wp-block-post-featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"198\" src=\"https:\/\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/5787\/files\/2022\/07\/IMG_4220-1-940x198.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"\" style=\"object-fit:cover;\" \/><\/figure>","protected":false},"excerpt":{"rendered":"<p>Brown marmorated stink bug (BMSB, Halyomorpha halys) is a direct pest of hazelnuts across its invaded range worldwide including in the Pacific Northwest. Our program began redistribution efforts of the biological control agent Trissolcus japonicus soon after it was discovered &hellip; <a href=\"https:\/\/blogs.oregonstate.edu\/hazelnuts\/bmsb-egg-masses-and-nymphs-now-in-orchards\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":8267,"featured_media":137,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[23,9,5,26,24,25],"class_list":["post-130","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ipm","tag-bmsb","tag-hazelnut","tag-insect","tag-parasitoid","tag-trissolcus","tag-wasp"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>BMSB egg masses and nymphs now in orchards - 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\/bmsb-egg-masses-and-nymphs-now-in-orchards\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"BMSB egg masses and nymphs now in orchards - Hazelnut Field Notes\" \/>\n<meta property=\"og:description\" content=\"Brown marmorated stink bug (BMSB, Halyomorpha halys) is a direct pest of hazelnuts across its invaded range worldwide including in the Pacific Northwest. 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