There are no chemicals available for control of honey fungus. If honey fungus is confirmed, the only effective remedy is to excavate and destroy, by burning or landfill, all of the infected root and stump material. This will destroy the food base on which the rhizomorphs feed and they are unable to grow in the soil when detached from infected material.
To prevent honey fungus spreading to unaffected areas, a physical barrier such as a 45cm (18in) deep vertical strip of butyl rubber (pond lining) or heavy duty plastic sheet buried in the soil will block the rhizomorphs. It should protrude 2-3cm (about 1in) above soil level. Regular deep cultivation will also break up rhizomorphs and limit spread.
Avoid the most susceptible plants and instead use plants that are rarely recorded as being affected by honey fungus. Some less affected plants include: Arundinaria (and other bamboos), Buxus sempervirens, Callicarpa, Catalpa, Chaenomeles, Chimonanthus, Cordyline, Erica, Garrya, Ginkgo, Hypericum, Jasminum, Pittosporum, Rhamnus, Sarcococca, Tamarix, and Vaccinium.
See the download for a more complete list of susceptible and less affected plants.
There are no chemical controls available.
Honey fungus – resistant and susceptible plants (Adobe Acrobat pdf)