Woodworm killer can be used to kill infestations of wooden items. Find a wood worm treatment to suit your needs. Treatment for woodworm is generally controlled with a chemical insecticide. Woodworm can spread quickly and cause structural and cosmetic damage if it isn't treated quickly. The recommended method of application include painting or spraying the infected area. Once you've treated the woodworm infestation, you should monitor the levels of damp and moisture as this can prevent further outbreaks.