How to Manage Pests

Pests in Gardens and Landscapes

Wetwood or Slime flux

Wetwood is caused by several species of bacteria; yeast organisms may also be involved. Wetwood is especially common in elm and poplar, but affects many other plants including box elder, hemlock, magnolia, maple, and oak. Affected trees have stained areas of wood that exude fluid. Usually trees about 10 years of age or older exhibit symptoms. Foliage wilt and branch dieback can occur on severely infected trees. Although it can be unsightly, affected wood may be as strong as healthy wood.



Prevent wetwood bacteria and yeasts from infecting trees by avoiding injuries to bark and wood.

Wetwood infection
Wetwood infection causes stained wood

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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