{"id":5511,"date":"2021-06-28T11:45:59","date_gmt":"2021-06-28T08:45:59","guid":{"rendered":"https:\/\/www.nsl.fi\/ajankohtaista\/kalbladstekelns-glupska-larv\/"},"modified":"2021-06-30T09:34:05","modified_gmt":"2021-06-30T07:34:05","slug":"kalbladstekelns-glupska-larv","status":"publish","type":"post","link":"https:\/\/www.nsl.fi\/fi\/ajankohtaista\/kalbladstekelns-glupska-larv\/","title":{"rendered":"K\u00e5lbladstekelns glupska larv"},"content":{"rendered":"\n<p><strong>Se upp f\u00f6r gnagskador p\u00e5 v\u00e5roljev\u00e4xternas blad gjorda av K\u00e5lbladstekelns glupska larv!<\/strong><\/p>\n\n\n\n<p>Lokalt har det nu hittats skador p\u00e5 v\u00e5roljev\u00e4xters blad f\u00f6rorsakade av <strong>K\u00e5lbladstekelns glupska larv. <\/strong>K\u00e5lbladstekellarver f\u00f6rekommer i tv\u00e5 generationer, &#8211; en som angriper v\u00e5roljev\u00e4xter i juni-juli och en som angriper h\u00f6stoljev\u00e4xter fr\u00e5n augusti tills frosten kommer.<\/p>\n\n\n\n<p><strong>Den vuxna, \u00e4ggl\u00e4ggande stekeln<\/strong> liknar en fluga som \u00e4r 6-8 mm l\u00e5ng med orangegul bakkropp. Huvudet \u00e4r svart med m\u00f6rka antenner.<\/p>\n\n\n\n<p><strong>Sj\u00e4lva larven<\/strong>, som kl\u00e4cks ca en vecka efter \u00e4ggl\u00e4ggningen, \u00e4r f\u00f6rst ljust gr\u00e5gr\u00f6n och ca 2 mm l\u00e5ng och \u00e4r r\u00e4tt sv\u00e5r att uppt\u00e4cka. Men efter 3 \u2013 4 veckor har de <strong>v\u00e4xt till 15 \u2013 17 mm:s l\u00e4ngd, \u00e4r m\u00f6rkgr\u00e5 med sammetssvart rygg och en ljusare strimma p\u00e5 vardera sidan.<\/strong><\/p>\n\n\n\n<p>\u00c4ggen l\u00e4ggs i allm\u00e4nhet p\u00e5 bladens undersida och den nykl\u00e4ckta larven \u00e4ter inte skador genom hela bladet. N\u00e4r larven v\u00e4xt till sig \u00e4ter den h\u00e5l igenom bladen, &#8211; till sist finns bara bladnerverna kvar om f\u00f6rekomsten av larver \u00e4r st\u00f6rre. Larverna kan angripa ocks\u00e5 skidorna och d\u00e5 kan i v\u00e4rsta fall bara skidornas mellanv\u00e4gg l\u00e4mnas kvar.<\/p>\n\n\n\n<p><strong>Bek\u00e4mpningstr\u00f6skeln \u00e4r en larv i genomsnitt per planta<\/strong> och hotet \u00e4r st\u00f6rst om plantorna \u00e4r sm\u00e5 och best\u00e5ndet tvinv\u00e4xer.<\/p>\n\n\n\n<p><strong>Bek\u00e4mpning sker med pyretroider<\/strong>, &#8211; ofta bek\u00e4mpas k\u00e5lbladstekeln i samband med en tidigare bek\u00e4mpning av rapsbaggar.<\/p>\n\n\n\n<p>Denna sida \u00e4r uppdaterad den 28.6.2021 av Jan Gr\u00f6nholm, NSL<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Se upp f\u00f6r gnagskador p\u00e5 v\u00e5roljev\u00e4xternas blad gjorda av K\u00e5lbladstekelns glupska larv! Lokalt har det nu hittats skador p\u00e5 v\u00e5roljev\u00e4xters blad f\u00f6rorsakade av K\u00e5lbladstekelns glupska larv. K\u00e5lbladstekellarver f\u00f6rekommer i tv\u00e5 generationer, &#8211; en som angriper v\u00e5roljev\u00e4xter i juni-juli och en som angriper h\u00f6stoljev\u00e4xter fr\u00e5n augusti tills frosten kommer. Den vuxna, \u00e4ggl\u00e4ggande stekeln liknar en fluga &#8230; <a title=\"K\u00e5lbladstekelns glupska larv\" class=\"read-more\" href=\"https:\/\/www.nsl.fi\/fi\/ajankohtaista\/kalbladstekelns-glupska-larv\/\" aria-label=\"Lue lis\u00e4\u00e4 aiheesta K\u00e5lbladstekelns glupska larv\">Lue lis\u00e4\u00e4<\/a><\/p>\n","protected":false},"author":2,"featured_media":4808,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","footnotes":""},"categories":[9],"tags":[],"class_list":["post-5511","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ajankohtaista"],"acf":[],"taxonomy_info":{"category":[{"value":9,"label":"Ajankohtaista"}]},"featured_image_src_large":["https:\/\/www.nsl.fi\/wp-content\/uploads\/NSL_news_13.jpg",1024,576,false],"author_info":{"display_name":"Jan Gr\u00f6nholm","author_link":"https:\/\/www.nsl.fi\/fi\/author\/polkka\/"},"comment_info":0,"category_info":[{"term_id":9,"name":"Ajankohtaista","slug":"ajankohtaista","term_group":0,"term_taxonomy_id":9,"taxonomy":"category","description":"","parent":0,"count":16,"filter":"raw","cat_ID":9,"category_count":16,"category_description":"","cat_name":"Ajankohtaista","category_nicename":"ajankohtaista","category_parent":0}],"tag_info":false,"publishpress_future_action":{"enabled":false,"date":"2026-04-14 15:48:48","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/posts\/5511","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/comments?post=5511"}],"version-history":[{"count":1,"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/posts\/5511\/revisions"}],"predecessor-version":[{"id":5512,"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/posts\/5511\/revisions\/5512"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/media\/4808"}],"wp:attachment":[{"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/media?parent=5511"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/categories?post=5511"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nsl.fi\/fi\/wp-json\/wp\/v2\/tags?post=5511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}