Why I Oughta...

One morning in the past few weeks, I witnessed this weird event:  a tree in the front yard was shedding all of it's leaves at once.  Check out what seems like a shower of leaves falling.  One right after the other.  You can see from the pattern on the ground that this tree was dropping them all in a matter of minutes while the other trees still are holding on to theirs.  You can also notice that there's frost on the roof across the street from us and I *think* that this might have been the first frost?  Could that have set off this reaction? 

A few days ago, I posted an updated photo of our Saucer Magnolia tree in the front yard and mentioned this blight/mold/black stuff that is on quite a bit of the leaves.  You can see it in the photo above.  After digging around on the Web, I think that it might - or might not be Sooty Mold.  The University of Minnesota Agricultural Extension has a post up that is titled:   Non harmful tree conditions that catch your eye but require no management .  In the section on Sooty Mold, they provide the description and a photo that looks an awful lot like the one above.   Here's a screenshot: But if you look elsewhere on the topic of Sooty Mold, the photos look totally different .  Most of the articles reference insects and/or aphids, which our Magnolia doesn't appear to have inhabiting it right now.  I also found this photo of something called Fungal Leaf Spot in the Science Photo Library , which isn't exactly what I am seeing on our leaves.   I'll keep poking around an