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Button Mushroom post-harvest system

Protect quality through handling, product cooling, packing, storage and transport.

Practical explanation + detailed referenceSources & review ↓
Women sort and trim harvested button mushrooms in trays at a grading table, PT Dieng Djaya farm, Wonosobo, Central Java (archival, 1979). Downloaded as the 3840px Commons JPEG render; original is 4892x3249 image/tiff (95 MB).
Real cultivation photograph. Read its source for location and context; it is not a universal operating specification.Steijlen, Fridus · CC BY 4.0View full photograph ↗
On this pageChoose a section, or keep reading below

Read this in the full guide: Run a Button mushroom crop from receipt to room reset →

Understand the topic

What you need to know.

A button mushroom keeps living after it is picked. It breathes, develops, loses water and browns, and heat speeds all of it. This page follows the crop from the crate to the buyer: why cooling comes before packing, the temperatures ICAR-DMR publishes for each step, which pack suits which route, how to move the crop without warming it again, and the habits that shorten its life.

Teaching revised 2026-09-24. Source-linked editorial synthesis; this date does not imply independent technical review.

Part 01

A picked mushroom is still alive, and heat speeds its decline

The ICAR-DMR post-harvest bulletin lists four changes that spoil button mushrooms after picking: browning, veil opening, weight loss and microbial spoilage. They happen because the mushroom keeps respiring and developing after it leaves the bed.

It has little protection. It holds 85 to 90 percent moisture and has no conventional cuticle, so it loses water easily. Browning starts when handling breaks the cells and a browning enzyme meets the compounds it acts on. The bulletin says brown mushrooms represent mishandled and aged mushrooms.

Heat drives all four changes. The bulletin says mushrooms cannot be stored or transported for more than 24 hours at the ambient conditions of most of the country for most of the year. The ICAR-DMR Hindi folder for seasonal growers gives about 12 hours at normal temperature. Whichever figure applies to your route, the clock starts at picking.

Sources: ICAR-DMR post-harvest bulletin, 2008 · ICAR-DMR button folder

Farm workers carry wooden trays heaped with freshly picked button mushrooms through a bamboo-framed cropping shed at the PT Dieng Djaya farm, Wonosobo, Central Java (archival Kodachrome, 1979). Downloaded as the 3840px Commons JPEG render; original is 4980x3209 image/tiff (95 MB).
Workers with trays of freshly harvested button mushrooms inside a bamboo cropping shed in Indonesia, at the start of the post-harvest chain. Photo: Steijlen, Fridus, CC BY 4.0. Source
Part 02

The temperatures ICAR-DMR gives from picking to storage

These figures come from the post-harvest bulletin and the manual's post-harvest chapter, which repeat each other on most points.

Mushroom temperature at picking15 to 18 °CIt keeps rising in storage from respiration and the air around it.
Target after cooling4 to 5 °CReached as quickly as possible after harvest.
Respiration at 10 °C compared with 0 °C3.5 times higherThe reason to move the crop into cold at once.
Chilling before market4 °C for 6 to 8 hoursAfter grading and packing.
Household and commercial refrigerators4 to 7 °C
Chill storageminus 1 to minus 4 °CDepending on how fresh the mushrooms are.

Sources: ICAR-DMR post-harvest bulletin, 2008 · ICAR-Directorate of Mushroom Research: Mushroom Cultivation, Marketing and Consumption

Part 03

Cool first, then pack and move the crop cold

Cooling equipment ranges from a refrigerator for a small grower to a cold room for a commercial one. Whatever the scale, the order of work is the same.

  1. Get crates out of the roomMove full crates out of the growing room at once, so the field heat can start coming out.
  2. Cool in small lotsPacks of more than 10 kg, or layers of mushrooms 15 cm thick, cool badly. Air flowing vertically through the stack cools best.
  3. Keep fruit out of the coolerDo not store mushrooms with fruit. Fruit releases gases, ethylene among them, that turn mushrooms off-colour.
  4. Grade, pack and chillThe manual grades and packs, then chills at 4 °C for 6 to 8 hours before the crop goes to market.
  5. Keep it cold on the roadFor short distances, stack the packs in small wooden boxes with enough crushed ice in polypacks wrapped in paper. For long distances the manual calls refrigerated trucks essential.
  6. Never let it warm againThe manual warns that pre-cooling and packing are partly wasted if the crop is then stored or moved in heat.

Sources: ICAR-Directorate of Mushroom Research: Mushroom Cultivation, Marketing and Consumption · ICAR-DMR post-harvest bulletin, 2008

From crate to buyer

  1. Out of the roomField heat of 15 to 18 °C starts to leave.
  2. Pre-coolBring the mushrooms to 4 to 5 °C fast.
  3. Pack for the routeRetail pack, cold-store bag or punnet.
  4. Move coldIce boxes for short trips, refrigerated trucks for long ones.
Part 04

Choose the pack by where the crop is going

The ICAR-DMR documents describe several packs. They also differ on how much a bag should be vented, so each rule names its source.

IfYou sell to a local market
ThenThe manual and the bulletin record retail packs of 200 g or 400 g in thin polythene of less than 100 gauge, the most common pack in India.
IfThe packs will sit in refrigerated storage
ThenThe manual recommends 100 gauge polythene bags with a venting area of 0.5 percent.
IfThe crop travels a long way
ThenUse polystyrene or pulp-board punnets over-wrapped with a differentially permeable film, not polythene bags. The manual says such punnets reach about 10 percent carbon dioxide and 2 percent oxygen and keep a fresh look for 3 days at 18 °C.
IfYou pack in sealed film for longer holding
ThenThe manual gives 2.5 to 5 percent carbon dioxide with 5 to 10 percent oxygen as the best storage atmosphere, and 87 to 90 percent humidity inside the pack for the best colour.
IfYou are deciding whether to perforate bags
ThenThe sources differ. The bulletin reports a trial in which perforated bags at 15 °C gave more veil opening, browning and weight loss, and non-perforated bags at 5 °C kept best. The manual's crop chapter asks for a small hole of 0.2 mm in PP bags. Test both on your own route and record the result.

Sources: ICAR-Directorate of Mushroom Research: Mushroom Cultivation, Marketing and Consumption · ICAR-DMR post-harvest bulletin, 2008

Freshly harvested white button mushrooms sorted into red plastic punnets inside a crate, Tamil Nadu, India (Tamil caption 'button mushroom').
Harvested button mushrooms graded into punnets and crates, the kind of retail and bulk packs these rules compare. Photo: POURNIMA D, CC BY-SA 4.0. Source
Part 05

Handling habits that shorten shelf life

Common mistakeWashing mushrooms to make them look whiter.

Do this insteadSell them clean and unwashed. The manual says washing shortens shelf life and invites bacterial spoilage, and that clean, unwashed, properly packed mushrooms may be the better option.

Common mistakeChilling the crop, then leaving it on a hot platform or in an open vehicle.

Do this insteadKeep the chain cold all the way to the buyer; warming after pre-cooling undoes it.

Common mistakeLoading deep crates or large packs straight into the cooler.

Do this insteadCool in shallow layers and small packs so the centre cools too.

Common mistakeStoring mushrooms beside fruit in the same cold room.

Do this insteadGive mushrooms their own cooler space.

Common mistakePromising a buyer a shelf life you have not measured.

Do this insteadRecord time, temperature and weight loss on your own route and in each season. Published shelf-life figures come from trials under set conditions.

Sources: ICAR-Directorate of Mushroom Research: Mushroom Cultivation, Marketing and Consumption · ICAR-DMR post-harvest bulletin, 2008

Go deeper

Technical reference, records and tools.

Detailed crop-stage information, parameters, diagrams and specialist tools are kept together below. This material retains its source conditions and review limits.

Open the complete technical reference

Button Mushroom · process

Button Mushroom post-harvest system

Agaricus bisporus

Protect quality through handling, product cooling, packing, storage and transport.

Publication
Public editorial page
External review
Not yet recorded · needed from Button Mushroom technical reviewer
Updated
2026-08-22
Evidence records
2
Freshly harvested white button mushrooms sorted into red plastic punnets inside a crate, Tamil Nadu, India (Tamil caption 'button mushroom').
Harvested button mushrooms graded into punnets/crates. Photo: POURNIMA D, CC BY-SA 4.0. Source

From harvest to market

Button mushroom. Source: ICAR-DMR manual 2011, post-harvest bulletin 2008 and button folder.

  1. PickVeil closed, cap 4 to 5 cm (folder: 3 to 4 cm); rotate off between finger and thumb.Harvest
  2. Trim and gradeCut the soiled stem end with a sharp knife; grade by size and openness.At the farm
  3. CoolPicked mushrooms are at 15 to 18 °C; bring them to 4 to 5 °C as quickly as possible.At once
  4. PackMostly 200 g or 400 g packets; in-pack humidity of 87 to 90 percent is best.Once cool
  5. SellNot more than 24 hours unchilled (bulletin); the folder says 12 hours at room temperature.Quickly
Picture → explanation → field task

From bed to buyer

AI-generated educational illustrations. Not actual farm photographs, diagnostic evidence or construction specifications.

Generated close-up illustration of a hand picking a Button mushroom from casing.
01

Pick with the next task in mind

The harvested crop is a delicate food product. Picking affects subsequent grading and handling. Skill and clean working practices matter beyond the amount picked.

Try this on your farm

Train pickers on the crop-specific method and buyer grade. Keep harvest containers and tools clean.

Generated illustration of a grower sorting Button mushrooms into different crates.
02

Separate grades and rejects

The lot is divided before it is priced or packed. Buyer requirements determine accepted grades. The illustrated sizes are not a universal grading standard.

Try this on your farm

Weigh each accepted grade and the rejected or unsold quantity separately. Record the reason for rejection.

Generated illustration of packaged mushrooms on a scale with an intentionally blank display.
03

Know what the scale includes

The pack and the mushrooms both add weight. Net produce weight and total packed weight are different. Blank displays in this illustration are not measurement evidence.

Try this on your farm

Check the scale and record tare, net weight, pack count and batch identity under the actual buyer's specification.

Generated illustration of an Indian grower handing a packed mushroom tray to a buyer beside a ledger.
04

Record acceptance and payment

Product handover and the financial record are connected. A delivery can be accepted before its money is received. Sales revenue is not the same as cash collected.

Try this on your farm

Record accepted quantity, agreed price, returns, payment received and outstanding balance. Reconcile these with harvest records.

Stage16

Crop-stage dashboard

Post-harvest

Biological state
Harvested mushrooms continue to change and lose quality
Operator objective
Remove heat and protect the product through distribution
Handoff
Close product traceability and return the room to hygiene reset
ObserveProduct temperaturehandlingpack condition
Depends onHarvest lotcoolingclean pack route

Quick orientation

Post-harvest control begins at picking. Product temperature, handling time, pack design and distribution conditions should be recorded as a chain rather than treated as a cold-room claim.

01

System role

The post-harvest chain links harvest lots to cooling, grading, packing, storage, transport and customer specification.

02

What to observe

Build a record before making a change.

  • Product temperature
  • Time and handling events
  • Surface condition and damage
  • Package and transport environment

03

Decision framework

Use the observation to narrow a decision, then verify the response.

  • Prioritise cooling by risk
  • Choose and validate pack format
  • Maintain lot identity
  • Reject unsupported shelf-life promises

04

Dependencies and handoffs

This topic cannot be interpreted in isolation.

  • Harvest hygiene
  • Cooling capacity
  • Clean packaging
  • Cold-chain continuity
  • Market specification

05

Practical layer

Start in the room with product temperature and time and handling events. Record location, stage and recent events before changing the process.

06

Technical layer

The technical model joins harvest hygiene, cooling capacity, clean packaging. Any operating value must be attached to a registered parameter, measurement location and applicable condition.

07

Evidence boundary

This page is grounded in: Technical Bulletins; Mushroom Cultivation, Marketing and Consumption. Source provenance does not remove the need to check stage, system, date and local applicability.

Progressive depth

Go deeper without losing the field question.

PracticalWhat to notice in the room
  • Product temperature
  • Time and handling events
  • Surface condition and damage
  • Package and transport environment
TechnicalHow the interacting system is interpreted
  • Harvest hygiene
  • Cooling capacity
  • Clean packaging
  • Cold-chain continuity
  • Market specification
ResearchWhich evidence records govern this page
  • ICAR-DMR-TECH-BULLETINS
  • ICAR-DMR-CULTIVATION-MANUAL

Technical registry

The numbers for this stage, with their source.

Values are published from ICAR-DMR guidance with the stage and measuring point they apply to. A parameter still marked pending has no published Indian value yet.

BUTTON.POSTHARVEST.PRODUCT_TEMPERATURE

Product temperature after pre-cooling

4 to 5 °C

Pre-cool to a pulp temperature of 4 to 5 °C; refrigerated storage at 4 to 7 °C keeps fresh buttons for 2 to 3 days.

Stage
Post-harvest
Measured at
Representative product core or validated proxy
Crop meaning
The mushroom itself through cooling, packing and distribution.
Applicable conditions
Pack format; Cooling method; Measurement method
published sourced
Evidence and review record2 mapped sources

Sources support the page architecture and conceptual guidance. Technical values remain governed separately in the Button registry.

Tier A · institutional

Technical Bulletins

Official index for crop protection, post-harvest, farm design, spawn and developed technologies.

Accessed
2026-08-22
Publisher
ICAR-Directorate of Mushroom Research
Open original source
Tier A · foundational

Mushroom Cultivation, Marketing and Consumption

Broad cultivation, post-harvest and market context. Values are not promoted without page-level review.

Accessed
2026-08-22
Publisher
ICAR-Directorate of Mushroom Research
Open original source

Read the evidence

Sources & review.

Editorial update: 2026-08-22. Independent technical review is not recorded for this entry.

  1. Technical Bulletins ↗

    ICAR-Directorate of Mushroom Research

  2. Mushroom Cultivation, Marketing and Consumption ↗

    ICAR-Directorate of Mushroom Research

Reading a source is not the same as applying its instructions to every farm. Confirm species, strain, crop stage, system, region and publication date. Old chemical recommendations are not current-use instructions.

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