Maple Tree Death: Red Stained Wood and Foul Odor Explained

A Sudden Decline with Disturbing Symptoms

A 15-year-old maple tree that lost all its leaves mid-summer, then revealed red-stained wood and a foul, rotten-egg odor when cut down, points to a specific condition: slime flux (also known as wetwood).

What Is Slime Flux?

Slime flux is a bacterial disease that builds up pressure inside the tree, forcing a foul-smelling liquid out through cracks in the bark. The bacteria cause the wood to develop a reddish discoloration. While slime flux itself rarely kills a tree directly, it often leads to secondary infections.

The Likely Killer: Verticillium Wilt

Trees stressed by slime flux frequently develop verticillium wilt, a fungal disease that blocks water transport and causes rapid leaf drop and death. This is the probable cause of your maple's demise.

Good News: It's Not Contagious

Slime flux and verticillium wilt are not considered highly infectious to other trees. The bacteria typically enter through wounds. Your other trees are not at immediate risk unless they have similar injuries.

Prevention for Future Trees

Avoid wounding tree trunks and roots. Proper mulching, watering during droughts, and protecting bark from mower and string-trimmer damage reduce entry points for bacteria.