{"id":7380,"date":"2026-08-08T08:50:58","date_gmt":"2026-08-08T08:50:58","guid":{"rendered":"https:\/\/pawel.stefanoff.pl\/bugs\/?p=7380"},"modified":"2026-08-14T21:20:24","modified_gmt":"2026-08-14T21:20:24","slug":"2026-06-shifting-world-of-the-brassy-willow-beetle-es","status":"publish","type":"post","link":"https:\/\/pawel.stefanoff.pl\/bugs\/es\/posts\/2026-06-shifting-world-of-the-brassy-willow-beetle-es\/","title":{"rendered":"Robando las armas del sauce: El mundo cambiante de Phratora vitellinae"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Les presento al escarabajo <em>Phratora vitellinae<\/em>, un peque\u00f1o escarabajo de hojas de entre 4 y 5 mil\u00edmetros que se encuentra ampliamente distribuido por Europa. Tanto los adultos como las larvas se alimentan vorazmente de las hojas de chopos y sauces. En una brillante haza\u00f1a de qu\u00edmica evolutiva, estos escarabajos secuestran el mecanismo de defensa natural del propio sauce: absorben la salicina t\u00f3xica de la planta y la convierten en salicilaldeh\u00eddo, un l\u00edquido vol\u00e1til y de olor pestilente. Al verse amenazadas por depredadores como las ara\u00f1as, las larvas excretan esta sustancia qu\u00edmica a trav\u00e9s de gl\u00e1ndulas dorsales, creando una gota protectora en sus espaldas. Durante las explosiones demogr\u00e1ficas, pueden convertirse en plagas graves, esqueletizando las hojas hasta que el follaje parece completamente chamuscado. Pasan el invierno como adultos resguardados en las grietas de la corteza y la madera muerta, listos para emerger en primavera. Me top\u00e9 con estos escarabajos varias veces durante mi viaje en bicicleta por las costas de Suecia y Finlandia. Dependiendo de los cambios en la luz natural, sus \u00e9litros met\u00e1licos cambiaban m\u00e1gicamente entre tonos bronce, cobre, verde y azul intenso. Durante un encuentro, incluso logr\u00e9 captar una imagen \u00edntima de una pareja en pleno apareamiento, cuando el macho parec\u00eda tener un color diferente al de la hembra.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les presento al escarabajo Phratora vitellinae, un peque\u00f1o escarabajo de hojas de entre 4 y 5 mil\u00edmetros que se encuentra [&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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