Serious Plant Disease discovered in Morganstown

This statement has been issued at the request of the Council Parks Department.

Cardiff Council has discovered an outbreak of Phytophthora Ramorum at the Mound Field Motte site in Morganstown and will now be working to destroy the infected vegetation. Phytophthora Ramorum – known as Sudden Oak Death – is a fungal infection and has been found on rhododendron in the small woodland area around the motte. DEFRA (Department for Environment, Food and Rural Affairs) has been informed and under its instructions the Council now has to remove and destroy all affected vegetation to limit the chance of the disease spreading.

Phytophthora spores spread through water, including airborne droplets which can be carried on animals, and through infected water in soil. The Mound Field site is extremely waterlogged and there are no footpaths. The area will now need to be fenced off before any works take place to ensure that there is no public access to the infected area. All vegetation will then need to be removed from around the mound and burnt in accordance with the destruction notice issued by FERA (the Food and Environment Research Agency), an agency of DEFRA. As the site is a Scheduled Ancient Monument, consent has been obtained from CADW for this work to begin.

A second fenced off area in the north western corner of the field will need to be created for the burning to take place. Due to this area being close to an adult-sized football pitch, use of this pitch will be suspended while the burning operations are in progress until at least the end of the year, subject to ground conditions. This burning is also expected to take until at least the end of 2009. The fencing will need to be retained on the main site to exclude public access until it has been declared free of the disease, which could take between three and five years.

The infection was detected when the rhododendrons on the site were routinely tested as part of the process of preparing the Conservation Management Plan for the Mound field Motte site in early November. This outbreak does not appear to be linked to a similar recent infection at Parc Cefn Onn.