A nematode species that can cause a pest of potential economic importance to the area, which can be one specific country or a whole continent, endangered thereby and not yet present there, or present but not widely distributed and being officially controlled, as in the Glossary of Phytosanitary Terms produced by the International Plant Protection Convention (IPPC).
Organisms are categorized as quarantine pests based on these defining criteria, which are evaluated through pest risk analysis's (PRA).
In Europe, the European Plant Protection Organisation (EPPO) has as one of his aims to help its member countries to prevent entry or spread of dangerous pests (plant quarantine). The organization has therefore been given the task of identifying pests which may present a risk, and of making proposals on the phytosanitary measures which can be taken. In recent years, the identification of risk has been formalized, because transparent justifications of phytosanitary measures are required and phytosanitary measures have to be commensurate with the risk.
European Quarantine Nematodes
Heterodera glycines (only for EPPO)
Hirschmanniella spp. (except H. gracilis and H.loofi)
Xiphinema americanum s.l. (non european)
Xiphinema americanum s.s.