The leaves are antibacterial, anticancer, antiviral, astringent and febrifuge. It controls a wide range of pathogenic organisms, including viruses. It is used internally in the treatment of a wide range of disorders, including meningitis, encephalitis, mumps, influenza, erysipelas, heat rash etc. The leaves are harvested in the summer and can be used fresh or dried. They are also macerated and the blue pigment extracted. This is also used medicinally, particularly in the treatment of high fevers and convulsions in children, coughing of blood and as a detoxifier in infections such as mumps. The root is antibacterial and anticancer. It is used in the treatment of fevers, pyogenic inflammation in influenza and meningitis, macula in acute infectious diseases, erysipelas, mumps and epidemic parotitis. Its antibacterial action is effective against Bacillus subtilis, haemolytic streptococcus,, C. diphtheriae, E. coli, Bacillus typhi, B. paratyphi, Shigella dysenteriae, S. flexneri and Salmonella enteritidis. Both the leaves and the roots are used in the treatment of pneumonia.The root and the whole plant have anticancer properties whilst extracts of the plant have shown bactericidal properties.
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Plants are hardy to about -15°c. Woad is a biennial, or occasionally a short-lived perennial plant. It has a very long history as a dye plant, being used by the ancient Britons to give a blue colouring to the skin. At one time woad was widely cultivated for this blue dye obtained from its leaves but with the advent of chemical dyes it has fallen into virtual disuse. It is currently (1993) being grown commercially on a small scale in Germany as a wood preservative (An item on BBC's Radio 4 Farming Programme).Plants self-sow freely when they are grown in a suitable position, though they tend not to thrive if grown in the same position for more than two years.
Problems, pests & diseases
Associations & Interactions
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Polycultures & Guilds
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