How to Manage Pests
Pests in Gardens and Landscapes
Foamy canker or alcoholic flux
Some species of bacteria or other microorganisms cause a
white frothy material to exude from cracks or holes in bark,
on elm, oak,
sweet gum, or Victorian box. This foamy material appears
for only a short time during warm
weather and has an alcoholic or fermented odor. In severely
infected trees, the cambium beneath the bark may become
rotten, white, mushy, and eventually turn brown and die.
The cause of this malady is unknown. It is sometimes, but
not always, associated with Zymomonas bacteria.
Preventing injuries to bark may help to prevent this disease. Prune out infected tissue when it is limited
to a small area of the bark to allow wounds to close; avoid making large wounds. Severely affected trees
need to be removed.
canker on almond