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Helen Grogan

Research Officer - Horticulture

Research Interests

  • Pathology, epidemiology, diagnostics and control of fungal , viral and bacterial diseases of the cultivated mushroom
  • Mushroom substrate utilisation
  • Mushroom genomics
  • Horticultural and Forest plant pathology

Current Projects

  • A genomic approach to understanding and improving compost utilisation (DAFM-RSF funded) 
  • Characterising lignocellulose degradation in mushroom substrate by Agaricus bisporus strains (Teagasc funded) 
  • Genomic, transcriptomic and proteomic analyses of A. bisporus strains showing some resistance/tolerance to mushroom virus X (Teagasc and industry funded). 
  • Assuring the safety of mushrooms by the introduction of novel processes to reduce Listeria monocytogenes biofilms and environmental contamination in mushroom production facilities (DAFM-RSF funded) 
  • Alternative crops for the cut foliage sector (DAFM-RSF and industry funded) 
  • Forest management research (DAFM-RSF funded)


  • 1992, PhD, University College Dublin
  • 1985, H Dip Ed, Trinity College Dublin
  • 1983, DÉA, Université Claude Bernard, Lyon, France
  • 1982, MSc, Trinity College, Dublin
  • 1980, BA (Mod) Nat Sci, Trinity College Dublin

Professional Membership

  • BASIS Professional Register
  • British Society of Plant Pathologists
  • International Society of Mushroom Science
  • Society of Irish Plant Pathologists
  • Tuffen, MG and Grogan, H. (in press). Current, emerging and potential pest and disease threats to Irish Sitka spruce plantations and the role of pest risk analysis in protecting Sitka spruce from new pest threats. Forestry xxx
  • O’Hanlon R, Choiseul J, Brennan JM, Grogan H. (2018). Assessment of the eradication measures applied to Phytophthora ramorum in Irish Larix kaempferi For Path. 2018;48:e12389. https://doi.org/10.1111/efp.12389
  • Deakin, G., Dobbs, E., Bennett, J., Jones, IM, Grogan, HM & Burton, KS. (2017). Multiple viral infections in Agaricus bisporus - Characterisation of 18 unique RNA viruses and 8 ORFans identified by deep sequencing. Scientific Reports7, Article number: 2469 (2017) https://doi.org/10.1038/s41598-017-01592-9   
  • O’Hanlon, R., Choiseul,, Grogan, H. and Brennan, J.M. (2017).  In-vitro characterisation of the four lineages of Phytophthora ramorumEuropean Journal of Plant Pathology, 147:517–525. https://doi.org/10.1007/s10658-016-1019-2   
  • O’Brien, M., Kavanagh, K. & Grogan, H. (2017). Detection of Trichoderma aggressivum in bulk phase III substrate and the effect of aggressivum inoculum, supplementation and substrate-mixing on Agaricus bisporus yields European Journal of Plant Pathology, 147(1):199-209 https://doi.org/10.1007/s10658-016-0992-9
  • Fleming-Archibald, C., Ruggiero, A. & Grogan, (2015). Brown mushroom symptom expression following infection of an Agaricus bisporus crop with MVX associated dsRNAs.  Fungal Biology, 119: 1237-1245. https://doi.org/10.1016/j.funbio.2015.09.004
  • Eastwood, D., Green, J., Grogan, H. & Burton, K. (2015). Characterising the viral agents causing brown cap mushroom disease of Agaricus bisporus.   Applied and Environmental Microbiology 81(20): 7125-7134.  https://doi.org/10.1128/AEM.01093-15
  • O’Brien, M., Grogan, HM and Kavanagh, K. (2014). Proteomic response of Trichoderma aggressium f. europaeum to Agaricus bisporus tissue and mushroom compost.  Fungal Biology; 118:785-791 https://doi.org/10.1016/j.funbio.2014.06.004
  • Velusami, B., Curran, T. P., and Grogan, H. M. (2013a). Hydrogen sulfide gas emissions during disturbance and removal of stored spent mushroom compost. Journal of Safety and Health 19(4): 261-275. https://doi.org/10.13031/jash.19.10351 
  • Velusami, B., Curran, T. P., and Grogan, H. M. (2013b). Hydrogen sulfide gas emissions in the human-occupied zone during disturbance and removal of stored spent mushroom compost.  Journal of  Agricultural Safety and Health 19(4): 277-291(ASABE Superior Paper Award 2014) . https://doi.org/10.13031/jash.19.10444


  • Grogan, H. Advances in Trichoderma aggressivum epidemiology in mushroom compost (Keynote). 2016 Mushroom Short Course, State College, Pennsylvania State University, USA. 2nd -5th October 2016.  
  • Grogan, H. Characterising and detecting mushroom virus X (MVX) viruses within the European mushroom industry.  19th Congress of the International Society for Mushroom Science, Amsterdam, The Netherlands, 29th May – 2nd June, 2016. 
  • Velusami B, Curran T (Presenter) and Grogan, H. Hydrogen Sulphide Gas Emissions in the Human-Occupied Zone during Disturbance and Removal of Stored Spent Mushroom Compost.  Invited paper in the ’Programs of Excellence in Agricultural Safety and Health’ at the 2016 ASABE conference, Orlando, Florida, July 2016.