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Sample preparation guidelines for mushroom producers

Irish samples


Wrap a punnet in tissue or some absorbent material, place in a plastic bag and post sample in a rigid container with freezer blocks to keep sample cold.

Include the following details on a typed A4 page:

1. Mushroom strain (A15 etc...)

2. Compost supplier (Northway, Walsh etc..)

3. Flush and stage of flush (e.g. 1st Flush, coming to end of flush)

4. Comments on crop symptoms (e.g. Browning/ Poor development)

5. Test required (Virus, Mummy)


Take a representative sample (1kg approx.) and place in a, unsealed plastic bag. N.B. Do not make the bag airtight.

Post sample in a rigid container and include the following details:

1. Supplier

2. Growth stage (Bulk compost on delivery, First flush etc…)

3. Delivery date to your site.

4. Comments on crop symptoms if applicable.

5. Test required (Quality check, Virus test)

Overseas Samples

Contact brian.mcguinness@teagasc.ie or Helen.grogan@teagasc.ie with the following information:

  1. Sample type 
  2. Symptoms
  3. Test required (Advice on test required may be given upon contact with Teagasc if required).

Once we have been contacted, a letter of authority application is made to the Department of Agriculture , to allow import of samples for testing. Once you have recieved this letter,  attach it to the outside of your package, visible to customs. Any courier reference or flight numbers should be sent to brian.mcguinness@teagasc.ie

Mushrooms and compost samples should be prepared as per guidelines above.

Disclaimer: Teagasc endevours to process samples as fast as possible but delays may occur due to high sample volumes and research project commitments.


Post all samples to:

Brian McGuinness


Ashtown Research centre

Ashtown Plant/Mushroom Clinic




Cost (Per Sample)

Virus test (MVX, LaFrance)


Compost Quality test (checks for molds/pathogens and Agaricus growth)


Mummy test (bacterial isolation)


Pathogen identification by morphology (microscopic examination)


Pathogen identification by DNA extraction



Payments can be made by credit card over the phone or by invoice. To speed up payment process, please raise a purchase order number or reference number to be included on the invoice. Further details will be supplied upon contact. Existing Teagasc customers should contact donal.gernon@teagasc.ie to discuss options.