Mushroom diseases

These pages are about the various diseases that affect commercial mushroom crops. Read on for information on how to recognise, control and prevent them.

Diseases in UK mushroom crops

There are several diseases that affect commercial mushroom crops. Find out more about them, so you can identify, prevent and control outbreaks on your site.

Below you’ll find information about the following mushroom diseases:

  • Mushroom Virus X
  • Brown Cap Mushroom Virus
  • Fungal diseases (including Dry Bubble, Wet Bubble and Cobweb disease)
  • Trichoderma aggressivum

Mushroom Virus X (MVX)

Learn about how Mushroom Virus X is transmitted, what symptoms to look out for in your crops, and what to do to limit infection points on site and contain the spread.

Learn more about MVX

Brown Cap Mushroom Virus (BCMV)

Find out how to spot the signs of Brown Cap Mushroom Virus (BCMV), how to manage the disease and pick up some recommendations on how to prevent it from coming back.

Find out more about BCMV

Fungal diseases in mushrooms

This section provides details about different types of fungal diseases found in mushrooms. Read about Dry Bubble, Wet Bubble and Cobweb disease, and read recommendations on how to contain and manage them.

More on fungal diseases in mushroom production

Trichoderma aggressivum

Read about Trichoderma aggressivum in mushrooms and find out how to stay alert to the key symptoms. Learn how to monitor and test for the disease, and how to respond to outbreaks in your crop.

Detecting and managing Trichoderma aggressivum

Useful links

Use our Mushroom Crop Walker Guide to help identify pests, diseases and cultural disorders in your crop

Related AHDB-funded research projects in mushroom diseases

Detection and control of pathogens causing blotch and green mould in mushroom cultivation

Mushrooms: Identification, detection and control of Pseudomonas species causing different types of bacterial blotch symptoms

Mushrooms: Inhibiting fungicide degradation in casing, and evaluating fungicides, biopesticides and diseased area covering methods for fungal disease control


While the Agriculture and Horticulture Development Board seeks to ensure that the information contained within this and linked AHDB pages on Mushroom diseases is accurate at the time of publication, no warranty is given in respect thereof and, to the maximum extent permitted by law, the Agriculture and Horticulture Development Board accepts no liability for loss, damage or injury howsoever caused (including that caused by negligence) or suffered directly or indirectly in relation to information and opinions contained in or omitted from this document.

Biocidal, disinfectant and plant protection products must only be used in accordance with the authorised conditions of use. Regular changes occur in the authorisation status of biocides and plant protection products. For the most up-to-date information, please check with your professional supplier, BASIS-registered adviser or the Chemical Regulation Division (CRD) of HSE ( before use.

© Agriculture and Horticulture Development Board [2021]. All rights reserved.

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Nathalie Key

Research and Knowledge Exchange Manager

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