International Standards for Phytosanitary Measures (ISPM): Guidelines for Regulating Wood Packaging Material (WPM) in International Trade (ISPM Publication No. 15). A widely-accepted international standard for phytosanitary measures to reduce the risk of introduction and or spread of quarantine pests associated with wood packaging material (including dunnage), made of coniferous and non-coniferous raw wood, in use in international trade. In short, this standard requires wood packaging materials used in international trade to be treated. The approved treatments are (1) heat treatment to a minimum wood core temperature of 56 ºC for a minimum of 30 minutes or (2) fumigation with methyl bromide (MB). The WPM also must be marked with the International Plant Protection (IPPC) logo. For the complete ISPM-15 document go to: www.spc.int/PPS/ispm.htm. See also IPPC logo.