Once again, I am here to remind you to rake and save your leaves this fall - don't bag them and put them curbside! When you bag your leaves and put them out for pick-up you are giving away free mulch. It is a simple concept: trees benefit when they are mulched by fallen leaves. Mulch helps to regulate soil temperatures as worms and other organisms in the soil are busy breaking leaves down. This natural decomposition cycle benefits the soil which then benefits your trees and other plants.
Fallen leaves are also a great mulch for yard islands and a really good addition to compost piles.
If you choose to rake them around your trees remember not to pile them up against the tree trunk - spread them out.
If you had a tree with fungal issues or one that had shown some other serious problem during the spring or summer, then you might want to completely dispose of your fallen tree leaves. Personally I have only seen fungal issues on some of my smaller, ornamental trees that were poorly sited.
Otherwise, trust nature's way to keep trees and other plants healthy and simply rake your leaves around your trees and into your yard islands or put them in the compost pile where they can break down to be used in the flower or vegetable garden.