​New Developments (2).

Scientists recently discovered that asexual spores of H. fraxineus are infectious and are able to germinate on leaves and infect seedlings via the soil. The asexual spores may possibly be carried by insects, water and/or wind and are produced in large numbers throughout the year.

The findings have significance for developing strategies to limit the spread of ash dieback. It is also possible that several strains of H. fraxineus could be found in any particular group of ash trees and rapid evolution of the fungus could occur.

This could potentially result in more ash species being susceptible and the disease could even develop such that other species in the Oleaceae family, such as privet, lilac and olive become susceptible.