{"id":7368,"date":"2026-08-08T08:50:58","date_gmt":"2026-08-08T08:50:58","guid":{"rendered":"https:\/\/pawel.stefanoff.pl\/bugs\/?p=7368"},"modified":"2026-08-14T21:16:21","modified_gmt":"2026-08-14T21:16:21","slug":"2026-06-shifting-world-of-the-brassy-willow-beetle-pl","status":"publish","type":"post","link":"https:\/\/pawel.stefanoff.pl\/bugs\/pl\/posts\/2026-06-shifting-world-of-the-brassy-willow-beetle-pl\/","title":{"rendered":"Skradziona bro\u0144 wierzby: Mieni\u0105cy si\u0119 tysi\u0105cem barw \u015bwiat j\u0105trewki wiklin\u00f3wki"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Poznajcie j\u0105trewk\u0119 wiklin\u00f3wk\u0119 (<em>Phratora vitellinae<\/em>) \u2013 niewielkiego, mierz\u0105cego od 4 do 5 milimetr\u00f3w chrz\u0105szcza z rodziny stonkowatych, kt\u00f3ry powszechnie wyst\u0119puje w ca\u0142ej Europie. Zar\u00f3wno doros\u0142e osobniki, jak i larwy \u017ceruj\u0105 intensywnie na li\u015bciach topoli i wierzb. W wyniku genialnej ewolucyjnej sztuczki chemicznej, chrz\u0105szcze te przejmuj\u0105 naturalny mechanizm obronny ro\u015bliny \u017cywicielskiej: pobieraj\u0105 toksyczn\u0105 salicyn\u0119 z wierzby i przekszta\u0142caj\u0105 j\u0105 w aldehyd salicylowy \u2013 lotn\u0105, niezwykle \u015bmierdz\u0105c\u0105 ciecz. Zagro\u017cone przez drapie\u017cniki (np. paj\u0105ki), larwy wydzielaj\u0105 ten zwi\u0105zek ze specjalnych gruczo\u0142\u00f3w grzbietowych, tworz\u0105c na ciele ochronn\u0105 barier\u0119. W latach masowych pojaw\u00f3w owady te staj\u0105 si\u0119 uci\u0105\u017cliwymi szkodnikami, doprowadzaj\u0105c do szkieletowania li\u015bci, przez co korony drzew wygl\u0105daj\u0105 jak opalone ogniem. Zimuj\u0105 jako doros\u0142e osobniki w szczelinach kory i martwym drewnie, by wybudzi\u0107 si\u0119 wczesn\u0105 wiosn\u0105. Na te chrz\u0105szcze natkn\u0105\u0142em si\u0119 wielokrotnie podczas wyprawy rowerowej wzd\u0142u\u017c wybrze\u017cy Szwecji i Finlandii. W zale\u017cno\u015bci od k\u0105ta padania \u015bwiat\u0142a, ich metaliczne pokrywy mieni\u0142y si\u0119 odcieniami br\u0105zu, miedzi, zieleni i g\u0142\u0119bokiego b\u0142\u0119kitu. Podczas jednego ze spotka\u0144 uda\u0142o mi si\u0119 nawet uchwyci\u0107 intymny widok kopuluj\u0105cej pary, gdy samiec zdawa\u0142 si\u0119 mie\u0107 inne ubarwienie ni\u017c samica.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Poznajcie j\u0105trewk\u0119 wiklin\u00f3wk\u0119 (Phratora vitellinae) \u2013 niewielkiego, mierz\u0105cego od 4 do 5 milimetr\u00f3w chrz\u0105szcza z rodziny stonkowatych, kt\u00f3ry powszechnie wyst\u0119puje [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":8709,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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