Describe the change
Irregular fleshy growth with white surface growth early in development.
Fungal diseases
Wet bubble
A disease of developing mushroom tissue, often producing swollen, disorganised masses rather than a normal cap and stem.
Organism / cause: Mycogone perniciosa / Hypomyces perniciosus
Where this evidence applies: Agaricus disease; the two names occur in different publications.
Reference image only. These are published study examples, not photographs of your crop or claims about an Indian outbreak.
Picture → observation → next check
Read the picture with the evidence
Keep another explanation open
Dry bubble; early distorted tissue is not reliably separated by a casual photograph.
Collect one useful piece of evidence
Trace the casing batch and where it was stored or handled.
A visual match is only a starting point. Request specialist examination to distinguish wet bubble from dry bubble before selecting a removal method.
01 · Observe
What you may see
- Irregular fleshy growth with white surface growth early in development.
- Amber droplets, browning and deterioration may appear as affected tissue ages.
02 · Compare
What can look similar
- Dry bubble; early distorted tissue is not reliably separated by a casual photograph.
- Aborted or unusually shaped pins caused by environmental disturbance.
How it may arise or move
Soil or casing contamination and movement of infected material are key pathways; splashing can distribute contamination.
03 · Check
Collect evidence before changing the crop
- Trace the casing batch and where it was stored or handled.
- Photograph intact masses and map their distribution before disturbance.
What confirmation needs: Request specialist examination to distinguish wet bubble from dry bubble before selecting a removal method.
Use the field record and sampling checklist →04 · Respond
What to do next
- Avoid splashing or handling unidentified bubbles.
- After identification, trained staff should use an agreed containment and disposal procedure; dry-bubble handling rules are different.
These are investigation and containment steps, not a guaranteed cure. Do not eat, sell or distribute suspect material on the strength of a visual match. Do not culture unknown contaminants or experiment with pesticides in a growing room.
05 · Learn
Reduce recurrence
- Protect casing, tools and water from dirty-floor or spent-compost contact.
- Review entry hygiene and separation of crop waste from new material.
After intervention, compare new affected units, crop condition and inspection results against the same recorded baseline. A lack of visible growth does not, by itself, verify decontamination or food safety.
Read the stage-by-stage prevention plan →Evidence & sources
Established disease described in institutional guidance and reviews; no chemical rates reproduced.
- Fungal diseases in mushrooms: wet bubble disease ↗
AHDB archive · Undated archived guidance
Used for: Bubble recognition and distinction from dry bubble.
Limit: Removal advice requires correct identification and a trained supervisor; UK treatment labels are not transferable.
- Control of Fungal Diseases in Mushroom Crops while Dealing with Fungicide Resistance: A Review ↗
Gea et al., Microorganisms 9:585 · 2021
Used for: Dry bubble, wet bubble, cobweb and green mould; Figure 1 reference photographs.
Limit: Review, not a local diagnosis. Fungicide approvals and resistance vary by country. Photographs retained with CC BY attribution.
Compare related explanations
Fungal diseases
Dry bubble
An infection whose appearance changes with the age of the mushroom when it is attacked. A distorted pin and a spotted mature cap can belong to the same disease.
Principally cultivated Agaricus; do not transfer the diagnosis to every malformed mushroom.
Signs, checks & response →Fungal diseases
Cobweb disease
Spreading surface growth can overrun casing and fruit bodies. The important clue is progression across the crop, not simply white colour.
Strong Agaricus evidence; additional cultivated hosts are documented in Korean studies. Susceptibility varies with isolate and host.
Signs, checks & response →