Tree Disease Management for single trees and forestry:
According to our own Foresters and the Royal Horticultural Society, all attempts to prevent the spread of DED have been long since abandoned in the region. Dead trees are a serious safety hazard and should be felled promptly.
Our advise has been that native elms should not be planted in place of a diseased tree, as they will almost inevitably succumb to DED, so we have followed this advice. We generally avoid planting resistant hybrid Elms exactly in their place as we chose to rest the ground for some time before replanting and, in any case, the resistant forms have a different growth habit to those that have been lost and do not exactly replace them.
Due to the risks posed by another phytoplasma disease called Elm yellows phytoplasma (Candidatus Phytoplasma ulmi) Clandon Park has chosen not to replant using imported Elm trees.
The Conservation Foundation have a Native Elm Programme for propagating elms from the survivors of the last disease outbreak. Anyone who knows of a healthy mature elm (at least 190cms circumference at breast height) or would like an elm to plant as part of the experimental programme is encouraged to contact the Conservation Foundation.
No chemical control is feasible. Protectant fungicides were injected into trunks in the early stages of the outbreak, but this was required annually and soon abandoned as impractical. It is also completely impractical to control the beetle vectors.
(Courtesy of the RHS)
Where single Elms trees once stood in coverts, woodland glades and forestry, other species soon inhabit their space. The great sadness is that the stately Ancient Elms of Clandon Park are no more because of this devastating disease that was apparently imported into this country in the 1960's . Our records show that our Elms started to be affected in the 1970's.
Conservation Management Plan
Historic England Listing:
List Entry Number: 1001171
Heritage Category: Parkland
Clandon Park Estate, West Clandon, Guildford, Surrey
All photographs curtesy of the Countess of Onslow. No photographs may be reproduced without her consent.