Get help (free!)

Test your knowledge about Bruising

Have you read the article about Mycelium and Mushroom Bruises carefully? It is time to pass a quick exam

Learning resources to pass this quiz: Mycelium Bruises or Mold Contamination

Shroomok's choice on Amazon

Flame Genie FG-P20 Premium Wood Pellets...
1 Full box of Red Oak wood shavings. 100...
Premium Food Grade Desiccant
Lime, Calcium Carbonate for mushroom cul...
Autoclavable Reusable Polypropylene Jars...
Desert Valley White Millet Seed, All Nat...
Food Dehydrator Machine, Digital Timer
Filtrete 20x20x1 Air Filter, MERV 12, MP...
Sodium Hypochlorite 5.25% - 1 Quart - Li...
Joseph's Grainery Unhulled Barley 12 Lbs...
Barton Pressure Pressure Cooker, 22 Qt
Wooden Stirrers Sticks

Questions covered in this Quiz

Case for id – Bruising or Mold? - What do you see in the photo? Try to identify it.

Possible answers:

  • Blue-green mold Penicillium
  • Green mold Trichoderma
  • Mycelium Bruising
  • Blue-gray mold Aspergillus

Case for id – Bruising or Contamination? - What do you see in the photo? Try to identify it.

Possible answers:

  • Mold contamination
  • Mycelium Bruising

Case for id – Bruising or Mold Contamination? - What do you see in the central part of the cake? Try to identify it.

Possible answers:

  • Blue-green mold Penicillium
  • Green mold Trichoderma
  • Mycelium Bruising
  • Green mold Cladosporium

Case for id – Bruising or Mold Contamination? - What do you see in this grain jar? Try to identify it.

Possible answers:

  • Mycelium Bruising
  • Green mold Trichoderma
  • Blue-green mold Penicillium
  • Green-gray mold Aspergillus

Case for id – Bruising or Mold? - What do you see in this grain bag? Try to identify it.

Possible answers:

  • Mycelium Bruising
  • Green mold Trichoderma
  • Blue-green mold Penicillium
  • Green-gray mold Aspergillus

The difference between mold contamination and mycelium bruising - What is the main difference between mold contamination and mycelium bruises?

Possible answers:

  • Bruises on mycelium or mushrooms never have a greenish tint
  • Molds have brighter blue color than bruised mycelium
  • Mold has a powdery or marshmallow texture, while mycelium and mushroom bruises don't
  • If you use Q-tip test and see colored powder on a cotton swab, it is mold; bruises don't leave any colored powder on a cotton swab

Case study - Can you identify what’s happening in this mushroom cake?

Possible answers:

  • Mycelium bruising
  • Green mold contamination
  • A mix of green mold contamination and bruising

Case study - Identify the problem and help the grower! "Hey guys, whats up? Big question, I left home for a couple days and asked a friend to water and leave some air on it for these days, it grown (more than I expected) but is this green thing a normal thing?"

Possible answers:

  • Yes, it's absolutely healthy cake, just mycelium bruising
  • No, it's mold contamination! Toss the cake immediately!

Case study - What does the Q-tip test show in this case?

Possible answers:

  • Mold contamination
  • Bruising

Case study - Take a look! What do you see in this spawn jar?

Possible answers:

  • Mycelium bruising
  • Blue-green mold contamination (Penicillium)
  • Early green mold contamination (Trichoderma)
  • Nothing wrong, absolutely normal snow-white mycelium

Read this article Mycelium Bruises or Mold Contamination to pass Quiz successfully