La drosofila del ciliegio, scientificamente nota come Drosophila suzukii, ha causato per la prima volta importanti danni ai frutteti in Svizzera.
Scoperta nella Confederazione per la prima volta nel 2011, la drosofila è un moscerino della frutta che è riuscito ad ambientarsi e a propagarsi soprattutto a sud delle Alpi, anche grazie a inverni non particolarmente rigidi.
Stando a quanto rende noto la stazione di Agroscope di Waedenswil (ZH), la lotta contro questo insetto è particolarmente difficile, visto che riesce a resistere anche agli insetticidi.
Danni ingenti
Attualmente non si può ancora stabilire l'ammontare esatto dei danni, sottolineano le autorità a Berna, secondo le quali nel solo canton Zurigo diverse fattorie hanno già perso fino al 40% dei raccolti.
ATS/bin
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