There are so many different fungi out there. Only some of them affect trees. Some grow on/in trees, but don’t really affect the tree’s health. Some usually don’t affect tree health, but can become pathogenic in the right circumstances. Identifying and understanding all these different fungi is definitely one of the more challenging parts of being an arborist. Over the years, I have run into a number of these fungi and done some homework on them. However, many of these fungi are pretty uncommon so retaining all the details I learn about a fungus I only see once in a while becomes an issue sometimes. To help with the challenges of identifying fungi, I made this Fungus photo identification helper tool. I’ve only recently created it, so there are a lot of fungi that I haven’t yet added to the list. But, it will grow with time as I use it. I hope you find it helpful. Watch this short video to see how it works.
). Typically the damage is done in early spring when the leaves are emerging and the tissue is soft and new. This makes the aphids difficult to diagnose early since most lay people feel everything is normal when the leaves are small in the spring. However, 2 months later, when the leave never 
I'm Keith Brown, owner of Austin Tree Experts. This is my repository of tree knowledge. I hope you find what you are looking for.
