Phytophthora ramorum is a fungus-like virus of plants that causes extensive damage and mortality to trees and other plants. The disease can not only effect the Oak family as the name would suggest but many more such as Beech, Spanish Chestnut, Everygreen Oak, Horse Chestnut and Larch. The disease can be dispersed by the movement of infected plants and plant products. The disease can also be dispersed by rain, mists and air currents. It is believed that the disease has come to Europe from Northern America during the 1990’s. In 2011 11 cases of the disease throughout woodlands in Ireland have been confirmed.