Cottonwood Tree smelly water at base
I have 2 huge/old cottonwood trees in my back yard and each of them seems to have water coming up from the ground at the base or from the tree itself that smells like sewage. I put a stick in it and it comes out black and smelly. The main sewer line is in the front of my house and the line is not damaged. The guy who trimmed it said "cottonwoods smell bad sometimes". It is not a lot of water and it just stays right at the base. The trees seem healthy overall but this is a big concerning. Do you have any ideas of what it could be?
It is possible that exudate and odor are a bacterial disease called Bacterial Wetwood. Here's some information: http://extension.colostate.edu/topic-areas/yard-garden/bacterial-wetwood-2-910/.