Definitions

From the IPPC Glossary of phytosanitary terms (ISPM 5):

Term	Defintion
Pest	Any species, strain or biotype of plant, animal or pathogenic agent injurious to plants or plant products.
Quarantine pest	A pest of potential economic importance to the area endangered thereby and not yet present there, or present but not widely distributed and being officially controlled.
Regulated non-quarantine pest	A non-quarantine pest whose presence in plants for planting affects the intended use of those plants with an economically unacceptable impact and which is therefore regulated within the territory of the importing contracting party.
Regulated pest	A quarantine pest or a regulated non-quarantine pest.