WSU Extension

Hortsense

Elm
 
Disease
Bacterial wetwood (Slime flux) 
Dutch elm disease 
Nectria canker 
Insect
Aphids 
Bark beetles 
Carpenterworm 
Elm leaf beetle 
Elm leafminer 
European elm scale 
Spiny elm caterpillar 



print version| pdf version| email url    
Caption: Elm bacterial wetwood (slime flux)
Photo by: R.S. Byther
  
Elm : Bacterial wetwood (Slime flux)
(revision date: 4/28/2014)


Biology
Wetwood or slime flux is a bacterial infection common in elm and poplar. The infection causes production of large amounts of moisture in the wood of trunks or large branches. The rancid-smelling, often brownish fluid seeps through the bark and is associated with discolored wood and streaks on the bark. Occasionally other symptoms including wilting, yellowing, and dieback may be associated with wetwood in elms. Typically, however, wetwood is primarily an aesthetic concern.
Management Options


Non-Chemical Management
  • Preventing injury to bark and wood may help prevent wetwood.
  • Installing plastic drain tubes to allow the fluid to drip on the ground rather than down the bark may improve the appearance of affected trees.
  • Affected branches can be removed for aesthetic reasons. Cut back to clean, healthy wood.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

+ Show larger images

 
Caption: Elm bacterial wetwood (slime flux)
Photo by: R.S. Byther