Swedish sawmills have received large quantities of timber attacked by spruce bark beetles, mainly in southern Sweden. There is even a risk that this timber will not be sawed at all, which means a loss for the forest owner and an unnecessary waste.          ''Swedish and European customers and builders do not want wood that has turned blue as a result of the trees dying from spruce bark beetle attacks. Although there is nothing really wrong with the wood properties. Blued spruce bark timber is a problem ...