is also called laminated root rot and is a root disease creating white rot. This is mostly found in Fd and Hw. It rarely has fruiting bodies.

is a root disease creating white rot. This is the worst in the conifers Sx, Hw and Ba. Europe has developed a bio-control agent so this less common than it has been in the past.

, also called cubical rot is a decay fungi that creates brown rot. This mainly attacks Cw and it attacks through scars. The fungus grows in the heart wood leaving the sap wood intact.

(formerly ostoyae) is a root disease. Its fruiting bodies are called honey mushrooms and it has mycelial fans that can be seen in live form or through they imprints.

also called Indian pain fungus is a decay fungus creating brown rot. This cannot attack healthy trees and its used by FN to make dyes.

also called red belt fungus is a decay fungus that creates a dry brown rot. This makes the trees very dangerous due to instability. The conks put on perennial growth.

is a decay fungus that creates white rot. It decays both the lignin and the cellulose. This is a form of true heart rot.

is a root disease creating white rot. This grows on spruce and the fruiting bodies are found a the base of the bole of the tree. This creates wood that looks like a honeycomb.

is a root disease that creates brown rot. It usually only infects individual trees and is particularly common on spruce and Fd.

is a foliage pathogen of hard pines. This pathogen changes the shape of hte branches creating brooms.

also called needle blight is a foliage pathogen of the pinus spp. It creates red bands on the needles which care caused by toxins. There are increased outbreaks of this pathogen because of climate change.

is also called white pine blister rust. It is a rust that needs to alter between the hosts Pw and Ribes spp. This causes cankers or stem swelling.

is a blister rust that affects hard pines (Pl,Py). It requires 2 plant species to complete its life cycle and continue spreading through pine stands.

The common name is the western gall rust. It produces orange galls on pine trees mainly on the branches but sometimes can affect the main stem. Its latin name is .

The mistle toe of the hard pines creates a whirl shape to its branches. The latin name is .

The fan shape creating brooms on hemlock is caused by . It tends to occur at the top of the tree and typically found near the coast region.