To establish the level of susceptibility (to both European and American isolates)
of tree and non-tree species of significant environmental and economic value to the EU.
This will include at least the following tree species within the Fagaceae (Quercus robur, Q. petraea,
Q. suber, Q. ilex, Q. cerris, Q. rubra and Fagus sylvatica), other hardwood
(Castanea sativa, Aesculus hippocastaneum, species of Ulmus, Corylus, Tilia,
Acer and Betula) and conifer species (Pinus sylvestris, P. nigra, Picea abies,
P. sitchensis, Abies spp., Taxus baccata and Pseudotsugae menzeisii). Non-tree species
also to be tested for susceptibility will include ornamental species and varieties marketed by the horticultural trade of
Rhododendron, Viburnum, Camellia and Pieris as well as key species of European heaths, moorlands and maquis
(Rhododendron, Vaccinium, Arctostaphylos, Calluna and Erica species). Testing of
woodland under-storey species (e.g, Rhododendron) will also be carried out as these may be a potential source of inoculum for tree epidemics.
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