CASES in all sizes and in various types of materials Plywood cases Plywood cases can be ordered for packings containing lightweight goods. Plywood is especially suited to shipments towards countries requiring the sue of treated material against parasitic phytopathogenic agents. By its very nature, plywood does not need to be treated because it is not a carrier of such agents. Wooded cases Wood is the material most widely used, but it provides no guarantee against attacks from parasites if it is not specially treated. Wood is employed on a large scale, especially for large capacity and very heavy packagings. When wood is chosen as a packing material, the finished case can be treated with methyl bromide. Alternatively, wood can be used which has been treated at high temperatures (HT), or the packing can be fumigated.