Skip to main content

Slime Flux

Slime Flux, Bacterial wetwood

A close up of an Clematis slime flux infection
Slime flux is a bacterial disease that affects a range of host tree species including oak, ash, maple, poplar and elm trees. Bacteria targets the sap that is released from wounds in the plant surface. Wounds may be caused by insect damage, pruning, poor branching or the natural splitting and cracking of the bark.
Free download for your phone or tablet
Download on the App StoreGet it on Google Play

Symptoms

Infected sap is dark and stains bark
Eventually sap takes on a foamy appearance and smells unpleasent.
Slime-infected sap becomes toxic to bark and degrades tree
Fermenting slime-sap mixture also attracts insect pests such as flies, ants and maggots.

Prevention

There is no cure, however disinfecting the wound and wiping off excess sap is highly advised. With continuous monitoring and repeated treatments such as this, tree death can be avoided.

Affected plants

Elm

Ulmus spp.

Poplar Tree

Populus spp.

Maple

Acer spp.

Ash

Fraxinus spp.

Oak

Quercus spp.

Free download for your phone or tablet
Download on the App StoreGet it on Google Play

Plant Knowledge

Search our ever-growing knowledge base to find plants and information. Find out about pests and diseases you should be keeping an eye out for. Watch How to videos or follow step by step guides for tasks in the garden. Free download for your phone or tablet.
Download on the App StoreGet it on Google Play