We are treating C. fraxinea as a ‘quarantine’ plant pathogen, which means that we may use emergency powers to contain or eradicate it when it is found. This is being done in the form of Statutory Plant Health Notices which we serve on affected owners. In the case of nursery plants and recently planted young trees, we require the owners to contain the site, and we may require that infected plants be destroyed to prevent disease spread. Equivalent measures are being taken on land managed by the Forestry Commission, and this is the only available treatment to get rid of the disease.

In the case of trees in established woodland and similar situations, where the trees are much larger, less accessible and in a mixture with other tree species, we require biosecurity measures to be taken to contain the infection on the site while we work to gain an overall national picture of the extent of the disease, and the likelihood that it will spread. Once we have completed that assessment, we will develop a Chalara control strategy.