The International Plant Protection Convention (IPPC; www.ippc.int) is a multilateral treaty for international cooperation in plant protection. It aims to protect plant health while facilitating international trade. The IPPC applies to cultivated plants, natural flora and plant products and includes both direct and indirect damage by pests (including weeds). The IPPC was adopted by the Conference of the FAO in 1951. There are currently 173 contracting parties to the IPPC.