Slime Flux on Chinese Elm: Diagnosis and Care

Sweet-smelling ooze at the base of a Chinese elm with bee activity indicates slime flux — bacterial fermentation of sap. Two types: "acidic" (vinegar smell) and "alcoholic" (beer smell). Often caused by deep planting or trunk wounds.

Management

• No external cure — tree walls off infection internally.
• Wash trunk to deter insects.
• Final rinse: 1 pint bleach per gallon water.
• Flow may be periodic or annual.

Deep planting is a common predisposing factor.

Slime flux on Chinese elm

Slime flux damage higher on the trunk