Il poligono del Giappone si sta sempre più espandendo in Ticino. Questa pianta invasiva è difficile da eliminare, in particolare laddove non possono essere usati diserbanti chimici, come nella zona golenale di protezione delle acque a nord della Morettina.
Bello, ma invadente...
Ed è proprio qui che si è optato per una soluzione più naturale: gli asini che, mangiandola, fungono da "diserbante".
Il ruolo ricoperto da questi mammiferi è importante: se non si ferma l’espansione di quella che l’Unione Europea ha messo nella lista delle cento specie più pericolose, si rischia, infatti, di perdere non solo biodiversità, ma anche delle zone agricole importanti.
CSI/mrj
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