Ganoderma disease (Ganoderma zonatum), also known as ganoderma butt rot, is a fungal infection that can affect trees around the world.
Ganoderma disease can be identified by a tree's failure to thrive. Brackets, the fruiting body of the fungus, grow at the base of the trees.
Young trees can tolerate infection by ganoderma. As the tree ages the effects will be more readily seen as branches and leaves die.
Ganoderma disease is spread by airborne spores. The spores enter the tree through an injury in the bark and make their way to the core.
Temperature and humidity affect how rapidly the fungus kills the tree.
No chemicals are available to control ganoderma disease. The only effective control is to remove infected trees and soil from a particular location.