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ISPM 15 affects all wood packaging material (pallets, crates, dunnages, etc.) and requires that they be debarked and then heat treated or fumigated with methyl bromide, and stamped or branded [1] with a mark of compliance. This mark of compliance is colloquially known as the "wheat stamp".
Wood treated with this process is often used for cladding or siding, flooring, furniture and windows. For the control of pests that may be harbored in wood packaging material (i.e. crates and pallets), the ISPM 15 requires heat treatment of wood to 56 °C for 30 minutes to receive the HT stamp.
Treated wood pallets must be stamped on two opposite sides, indicating either HT for heat treated or MB for methyl bromide treatment. Pallets made of non-wood materials such as steel , aluminum , plastic , or engineered wood products, such as plywood , oriented strand board , or corrugated fiberboard do not need IPPC approval, and are ...
These IPPC markings on a wood pallet indicate KD: kiln-dried, HT: heat treated, and DB: debarked. Essentially all wood packaging material that is exported to an IPPC member state must have a stamp such as this. When green wood dries, free water from the cell lumina, held by the capillary forces only, is the first to go.
Currently, the International Plant Protection Convention (IPPC), an international regulatory agency, mandates its 134 signatory countries to comply with the ISPM 15, which requires all dunnage to be heat-treated or fumigated with pesticides and marked with an accredited seal. There are several instances in which foreign insects have come ashore ...
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