Cobweb Disease On Mushroom?

By | September 4, 2019

I came across what I think is Cobweb Disease on this mushroom while hiking near the Ouachita National Forest here in Arkansas.

Cobweb Disease On Mushroom
Cobweb Disease On Mushroom

At first, I thought it was some type of spider that caused this but after some research I am now thinking Cobweb Disease. Here is what I read about this mold:

A mold that can infect cultivated mushrooms, cobweb disease, forms spider web-type growth that covers mushroom fruiting bodies.


Affected mushrooms eventually turn brown and rot. Sometimes the mycelium (vegetative part of a fungus, consisting of a network of fine white filaments) of the pathogen may change color, becoming pink or red, and the cobweb appearance is replaced by a mat of mycelium. Also in second or third flushes white dense powdery mycelial growth may occur on the casing surface.

American Mushroom Institute

You can see in my photo that the mushroom has turned brown. I also think that the rest of the information matches. The American Mushroom Institute has some pictures that look similar. If you have a different ideal, leave a comment below.

How I Got The Shot – Cobweb Disease On Mushroom

I was on a photo walk at my place near the Ouachita National Forest here in Arkansas. I was hand holding a Fujifilm X-T3 camera with a Canon EF 100-400 mm f/4.5-5.6L IS II lens attached with a Fringer EF-FX Pro.

Camera Settings

  • AV Mode
  • Back-button Focus
  • Aperture f8
  • ISO 2500
  • Shutter Speed – 1/150
  • Auto White Balance
  • Single Point, Continuous Auto Focus
  • Multi Metering
  • Focal Length – 400 mm

Here are a few more photos of cool things I have came across while hiking the Ouachita National Forest:

  1. Gall On Oak Tree
  2. Hole Through Tree

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