Much ado about nothing. This miscanthus that is proposed, Miscanthus gigantum, is a hybrid, and is sterile - it is spread through manual division of its rhizome. One would have to be careless or clueless to have it become a problem as an invasive species, if it is even possible at all.

I really wonder why this Professor Wiedemann thinks he can identify this species as a problem. A little knowledge and common sense show otherwise.