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Si chiamano locusta egiziana e aiolopo autunnale: sono le due specie di ortotteri che si possono osservare in Ticino durante il periodo invernale.
La locusta egiziana – segnala il Dipartimento del territorio – è originaria del bacino mediterraneo; in Ticino in passato era presente unicamente nel Mendrisiotto, zona che corrispondeva al limite settentrionale del suo areale. Ora, a causa del riscaldamento climatico, si è espansa anche più a nord, arrivando quasi sino nell’alta Valle di Blenio e persino Oltralpe.
La specie è assolutamente innocua, vegetariana e soprattutto solitaria, quindi nonostante le sue dimensioni - la femmina può arrivare ai 7,5 centimetri di lunghezza - i danni alla vegetazione sono molto contenuti.
Il Museo cantonale di storia naturale ne sta monitorando l’esistenza in Ticino. Da qui l’invito alla popolazione a segnalarne la presenza, possibilmente corredata da una fotografia, tramite l’apposito modulo di contatto sul sito.
L'invasione di Locuste nel Corno d'Africa
Telegiornale 02.02.2020, 21:00
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