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RE: The Amateur Mycologist - Another Tree Killing Fungus To Look Out For - Likely Armillaria Species Infecting My Favorite Trees
So this type of mushroom is the cause of root rot? Mushrooms thrive in wet soil, since you found two trees half mile away have them, maybe that indicates the city has some drainage problems....
This would be one of many tree born fungi which cause root rot, yes. Not all fungi are the result of poor drainage or moisture problems. In nature fungi that grow as parasites on living trees will look for an in however they can. Street trees are very suscepible to fungal infections because they suffer a lot of physicaly abuse to their bark. Once the bark is damaged mushroom spores, which are everywhere, can get into the tree's interior wood and start to grow. Once you've seen the actual mushroom, like here, you can be pretty sure your tree has a pretty asvanced infection.