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Lab manager for pathology lab
Coordinates the general day to day running of the pathology lab

Forest Pathology technician
Provides support to ongoing research in the pathology lab, particularly with regards the spread of Phytophthora austrocedri in the UK’s native juniper.

Carolyn Riddell joined Forest Research in 2016. Previously, she obtained a PhD at the University of Leicester (2009) in evolutionary biology and subsequently completed a post-doctoral position at the University of Edinburgh (2010-2012), validating next-generation sequencing data. After a period working at Edinburgh Genomics (2012-2014) she took up another role on the PROTREE project (2014-2016), where she worked on Dothistroma septosporum evolution in pine species, in conjunction with the University of Edinburgh and Scotland’s Rural College (SRUC), Edinburgh.


Member of the British Society for Plant Pathology

Forest pathology technician and Lab manager
Tree health


Northern Research Station

Bush Estate



Related Publications


Using genome resequencing to investigate racial structure, genetic diversity, sexual reproduction and hybridisation in the pine pathogen Dothistroma septosporum

Genome sequencing is used to determine the origins and genetic diversity of Dothistroma populations throughout the UK, and confirms the findings of our earlier paper discerning population structure with microsatellite analysis.



Metabarcoding reveals a high diversity of woody host-associated Phytophthora spp. in soils at public gardens and amenity woodlands in Britain

A study of Phytophthora diversity in public gardens and amenity woodlands through the use of metabarcoding of soil samples.

Factsheet: Climate change and tree diseases

The three main fungal root pathogens already present in the UK, causing significant damage in forestry, are described along with the likely impact of climate change on their spread and severity.

Factsheet: Climate change and diseases of tree foliage

The six main foliar pathogens already causing significant damage to conifers and broadleaved tree species in the UK are described along with the likely impact of climate change on their spread and severity.

Other Research

Distribution and transmission of Phytophthora austrocedri
Providing research support

  • Developing methods to determine the mechanisms of spread of P. austrocedri from outbreaks throughout Scotland.
  • Developing baiting techniques for P. austrocedri.

Peer reviewed journal articles

Piotrowska, M. J., Ennos, R. A., Riddell, C. and Hoebe, P. N. (2017), Fungicide sensitivity of Dothistroma septosporum isolates in the UK. For. Path., 47: n/a, e12314. doi:10.1111/efp.12314

Carolyn E Riddell, Juan D Lobaton Garces, Sally Adams, Seth M Barribeau, David Twell and Eamonn B Mallon, (2014) Differential gene expression and alternative splicing in insect immune specificity, BMC Genomics 2014 15:1031

Riddell CE, Sumner S, Adams S, Mallon EB, (2011) Pathways to immunity: temporal dynamics of the bumblebee (Bombus terrestris) immune response against a trypanosomal gut parasite, Insect Molecular Biology, Aug;20(4):529-40

Carolyn Riddell, Sally Adams, Paul Schmid-Hempel , Eamonn B Mallon, (2009), Differential expression of immune defences is associated with specific host-parasite interactions in insects, PLoS ONE 4(10): e7621

Riddell CE, Mallon EB, (2006) Insect psychoneuroimmunology: Immune response reduces learning in protein starved bumblebees (Bombus terrestris), Brain, Behavior, and Immunity, Mar;20(2):135-8