{"id":205,"date":"2017-05-25T13:51:39","date_gmt":"2017-05-25T21:51:39","guid":{"rendered":"http:\/\/blogs.oregonstate.edu\/vegnet\/?page_id=205"},"modified":"2023-07-11T22:40:52","modified_gmt":"2023-07-12T05:40:52","slug":"flea-beetles","status":"publish","type":"page","link":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/pest-profiles\/flea-beetles\/","title":{"rendered":"Flea Beetles"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li>Adult flea beetles cause distinctive &#8216;pitting&#8217; in upper leaf surfaces. This type of <strong>damage is easily recognizable.<\/strong><\/li>\n\n\n\n<li>Beetles are <strong>small <\/strong>(most &lt;1\/4&#8243;) and have enlarged femurs on their back legs. This allows them to jump very far, hence the common name. The &#8216;thickened thighs&#8217; can be used as an identification tool.<\/li>\n\n\n\n<li>Some of the common flea beetles we have here in the PNW are:<\/li>\n<\/ul>\n\n\n\n<p><em>Phyllotreta cruciferae<\/em>, <strong>crucifer flea beetle<\/strong> : metallic blue-green to black<\/p>\n\n\n\n<p><em>Phyllotreta striolata<\/em>, <strong>striped flea beetle<\/strong>: black with wide, wavy yellow stripes on wing covers<\/p>\n\n\n\n<p><em>Psylliodes punctulata<\/em>, <strong>hop flea beetle<\/strong>, sometimes called radish flea beetle: shiny black or green with brown legs<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The above species feed on brassica crops and cruciferous weedy hosts like yellow rocket, shephard&#8217;s purse and wild mustard. Common lambsquarters is also preferred<\/li>\n\n\n\n<li><strong>**Activity increases with warming temperatures, and invasion into fields can be rapid<\/strong>**<\/li>\n\n\n\n<li>Newly seeded crops are particularly vulnerable, the damage to cotyledons can cause uneven stands or crop loss.<\/li>\n\n\n\n<li>Larvae of most species feed on roots.<\/li>\n\n\n\n<li>Petiole clipping can occur.<\/li>\n\n\n\n<li>Treatment threshold varies by crop (more info coming soon), but <strong>to estimate feeding damage<\/strong>, here is a <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/prairiepest.ca\/wp-content\/uploads\/2019\/05\/2015_FleaBeetleDamage_LeafArea_Soroka_Underwood-1.jpg\" target=\"_blank\">handy graphic<\/a> <\/strong>(credit Soroka and Underwood, Agriculture and Agri-Food Canada).<\/li>\n\n\n\n<li>Spot or border treatments can be effective. Consult the <a href=\"https:\/\/pnwhandbooks.org\/insect\/crop-pests?combine=flea+beetle\">PNW Insect Management Handbook<\/a> for labeled products.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-jetpack-slideshow aligncenter\" data-effect=\"slide\"><div class=\"wp-block-jetpack-slideshow_container swiper-container\"><ul class=\"wp-block-jetpack-slideshow_swiper-wrapper swiper-wrapper\"><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"169\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-208\" data-id=\"208\" src=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/FBonLQwmk.jpg?resize=300%2C169&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/FBonLQwmk.jpg?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/FBonLQwmk.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/FBonLQwmk.jpg?resize=1024%2C576&amp;ssl=1 1024w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/FBonLQwmk.jpg?w=1485&amp;ssl=1 1485w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"234\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-209\" data-id=\"209\" src=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/olderwmk.jpg?resize=300%2C234&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/olderwmk.jpg?resize=300%2C234&amp;ssl=1 300w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/olderwmk.jpg?resize=768%2C600&amp;ssl=1 768w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/olderwmk.jpg?w=864&amp;ssl=1 864w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"231\" height=\"300\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-218\" data-id=\"218\" src=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/row_wm.jpg?resize=231%2C300&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/row_wm.jpg?resize=231%2C300&amp;ssl=1 231w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/row_wm.jpg?resize=768%2C995&amp;ssl=1 768w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/row_wm.jpg?resize=790%2C1024&amp;ssl=1 790w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/row_wm.jpg?w=844&amp;ssl=1 844w\" sizes=\"(max-width: 231px) 100vw, 231px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"280\" height=\"300\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-211\" data-id=\"211\" src=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/pit25_wm.jpg?resize=280%2C300&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/pit25_wm.jpg?resize=280%2C300&amp;ssl=1 280w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/pit25_wm.jpg?resize=768%2C823&amp;ssl=1 768w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/pit25_wm.jpg?w=800&amp;ssl=1 800w\" sizes=\"(max-width: 280px) 100vw, 280px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" alt=\"brown beetle on cotyledon\" class=\"wp-block-jetpack-slideshow_image wp-image-219\" data-id=\"219\" src=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/brown.jpg?resize=300%2C200&#038;ssl=1\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"252\" alt=\"\" class=\"wp-block-jetpack-slideshow_image wp-image-214\" data-id=\"214\" src=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/axil_wmk.jpg?resize=300%2C252&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/axil_wmk.jpg?resize=300%2C252&amp;ssl=1 300w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/axil_wmk.jpg?w=675&amp;ssl=1 675w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><\/li><li class=\"wp-block-jetpack-slideshow_slide swiper-slide\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"283\" alt=\"distinctive pitting damage on seedling\" class=\"wp-block-jetpack-slideshow_image wp-image-210\" data-id=\"210\" src=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/pit10_wm.jpg?resize=300%2C283&#038;ssl=1\" srcset=\"https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/pit10_wm.jpg?resize=300%2C283&amp;ssl=1 300w, https:\/\/i0.wp.com\/osu-wams-blogs-uploads.s3.amazonaws.com\/blogs.dir\/2847\/files\/2017\/05\/pit10_wm.jpg?w=725&amp;ssl=1 725w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><\/li><\/ul><a class=\"wp-block-jetpack-slideshow_button-prev swiper-button-prev swiper-button-white\" role=\"button\"><\/a><a class=\"wp-block-jetpack-slideshow_button-next swiper-button-next swiper-button-white\" role=\"button\"><\/a><a aria-label=\"Pause Slideshow\" class=\"wp-block-jetpack-slideshow_button-pause\" role=\"button\"><\/a><div class=\"wp-block-jetpack-slideshow_pagination swiper-pagination swiper-pagination-white\"><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Phyllotreta cruciferae, crucifer flea beetle : metallic blue-green to black Phyllotreta striolata, striped flea beetle: black with wide, wavy yellow stripes on wing covers Psylliodes punctulata, hop flea beetle, sometimes called radish flea beetle: shiny black or green with brown legs<\/p>\n","protected":false},"author":8003,"featured_media":0,"parent":8,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-205","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":false,"jetpack_shortlink":"https:\/\/wp.me\/P8vBJ4-3j","_links":{"self":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/pages\/205","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/users\/8003"}],"replies":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/comments?post=205"}],"version-history":[{"count":12,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/pages\/205\/revisions"}],"predecessor-version":[{"id":1773,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/pages\/205\/revisions\/1773"}],"up":[{"embeddable":true,"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/pages\/8"}],"wp:attachment":[{"href":"https:\/\/agsci-labs.oregonstate.edu\/vegnet\/wp-json\/wp\/v2\/media?parent=205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}