B-994

Bacterial Wetwood and Slime Flux

By Gary Franc, Cooperative Extension Service Plant Pathologist,

Department of Plant Sciences

Wetwood is a common disease in Wyoming that affects the wood and bark of shade and forest trees. It is characterized by water-soaked wood and a liquid that bleeds from wounds, branch stubs, crotches, frost crack, or other weak points in the wood and bark. The growth of secondary microorganisms causes the liquid to become slimy, producing slime flux, which can produce a foul smell.

There are no chemical treatments effective for preventing or curing wetwood. The best way, as explained in this publication, is to prevent damage and stress to tree roots and stems with proper irrigation and fertility management.