Blue stain fungi

They are usually divided into three different groups:[1] Importance of the symbiotic relationship between blue stain fungi and bark beetles.

Symbiotic association between bark beetles and species of blue stain fungi is a well-known and studied phenomenon in the forestry pathology.

[2] These spores are carried on the exoskeleton of the beetles from one tree to another and aid the insects in overcoming defence mechanisms of different pine species.

These spores immediately start to multiply and block important conductive vessels within the tree tissues.

[2] The major economic damage caused by the blue stain fungi is aesthetic because of the usually undesirable discoloration of wood.