Peruvian Anti-Biopiracy Commission seems to work

The European Patent Office rejected a request by the French multinational company Naturex to patent an alcoholic extract of maca, used in the treatment or prevention of sexual dysfunction and enhancing fertility.

Also, in 2000, Pure World Botanical Co in the US (now Naturex) applied for a patent for an alcoholic extract of maca. In 2002, INDECOPI assembled a working group consisting of public and private institutions, which concluded that the patent application should not be granted, because this use was already known and used. A year later, they presented scientific results showing lack of novelty of the application.

Ley Nº 28216 created the Anti-Biopiracy Commission which, since its creation, has been monitoring this action – Biopiracy and it has stopped eights patents overseas.

More info here and here.