1 Iritis is uncommon, but can be due to trauma, infections, or autoimmune conditions. Symptoms include pain, red eye, and often, decreased vision.  Optic neuritis. The nerve travelling from the back of the eyeball into the brain can become inflamed.
Oak root fungus, or white rot, is a widespread disease that becomes visible just beneath the bark and on roots. What looks like layers of light brown to tan mushrooms form in clusters at the base of the trees.
dry rot. Dry rot is such a big deal because the wood-eating fungus digests or absorbs the parts of the fibers that make wood timbers and beams both rigid and strong. The wood damaged by rot is usually somewhat dry and crumbly in appearance, hence the nickname âdry rotâ, although the fungus spores only thrive in a damp or moist environment.