What's Growing In Juniper Roots

[mrcasey]

Pulled a Juniperus procumbens 'Greenmound' out of its pot and saw at least 2 areas that had this stuff in it. Does anyone know what it is and if it needs treatment?

 

[The Barber]

Micorrhizal fungi, it is beneficial for your tree.

 

[mrcasey]

Micorrhizal fungi, it is beneficial for your tree.

I know that it isn't a pine so the fungus would be a different species, but the mycorrhizae that I see in pine roots don't look like this.

 

[Wires_Guy_wires]

Juniper myc usually isn't very visible unless they start forming fungal fruiting bodies. This could be one of those cases, but it might just be any other fungus feeding on the organics in the soil.
Fungi are hard to ID from mycelium alone, so you might never find out what it is or was.
But as long as your plant looks OK, it's not a problem to have it in the soil.

Root aphids sometimes look like fungus but they move, and they have bodies that don't look like fungal structures. If you've seen those a couple times, you can easily distinguish them. The stuff pictured aren't root aphids.