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Paul A. Egan

Paul Egan
I combine field and modelling approaches to develop biodiversity-based IPM strategies for sustainable crop production – incorporating in particular the ecology and evolution of plant/crop interactions with mutualists and antagonists (pests, pollinators, and natural enemies).


I contribute to graduate and undergraduate teaching and student supervision at PhD and MSc level.

Visiting Professor (2016-present), Department of Entomology, Agriculture and Forestry University, Nepal.


My work focuses on devising practical strategies and decision support tools – e.g. – to enhance the compatibility of IPM (concerning weeds, insects, and disease) and pollination and biocontrol ecosystem services to crops. This work has recently culminated in production of a novel framework for ‘Integrated Pest and Pollinator Management’.

Past research has included the study of 'reward' and 'resistance' traits in crop wild relatives, the effects of crop domestication on nectar/pollen chemistry and pollinator health, and modelling the response of invasive pest plants and functional biodiversity to climate change.


Extension activities include:

1.  contributions to advancing IPM systems for Swedish strawberry production, working in conjunction with advisors and growers.

2. consultancy work with UNESCO, UN FAO (Nepal Office), and IUCN for the production of research reports and policy briefs on climate change adaption solutions, particularly for smallholder cropping systems.


PhD, Plant-Animal Interactions, Trinity College Dublin, 2015.
MSc, Natural Products Chemistry, Leiden University, 2010.
BSc, Plant Biology, University of Aberdeen, 2008.

Selected publications

ResearchGate – Google Scholar

Egan PA, Dicks LV, Hokkanen HMT, and Stenberg JA (2020). Delivering Integrated Pest and Pollinator Management (IPPM). Trends in Plant Science.

Weber D, Egan PA, Muola A, Ericson LE, and Stenberg JA. (2020). Plant resistance does not compromise parasitoid-based biocontrol of a strawberry pest. Scientific Reports. accepted

Nicholson CC and Egan PA. (2020). Natural hazard threats to pollinators and pollination. Global Change Biology. 26, 380-391.

Flöhr, A., Stenberg JA, and Egan PA. (2020). The joint economic impact level (jEIL): a decision metric for integrated pest and pollinator management. In: Integrative Biological Control, Springer. In press. Preprint.

Weber D, Egan PA, Muola A, and Stenberg JA. (2020). Genetic variation in herbivore resistance within a strawberry crop wild relative (Fragaria vesca L.). Arthropod-Plant Interactions, 14, 31–40.

Wendin K, Egan PA, Olsson V, Forsberg S, Nilsson A, and Stenberg, JA. (2019). Is there a best woodland strawberry? A consumer survey of preferred sensory properties and cultivation characteristics. International Journal of Gastronomy and Food Science, 16, 100151.

Palmer‐Young EC, Farrell IW, Adler LS, Milano NJ, Egan PA, Junker RR, Irwin RE, and Stevenson PC. (2019). Chemistry of floral rewards: intra‐and interspecific variability of nectar and pollen secondary metabolites across taxa. Ecological Monographs, 89(1), e01335.

Egan PA, Muola A, & Stenberg JA. (2018). Capturing genetic variation in crop wild relatives: an evolutionary approach. Evolutionary Applications, 11(8), 1293-1304.

Egan PA, Bourke D, Thuiller W, Baudraz ME, Georges D, Renaud J, and Stout JC. (2018). Invasive aliens threatened with native extinction: examining best practice for species translocations under climate change. bioRxiv, 429084.

Palmer‐Young EC, Farrell IW, Adler LS, Milano NJ, Egan PA, Irwin RE, and Stevenson PC. (2019). Secondary metabolites from nectar and pollen: a resource for ecological and evolutionary studies. Ecology, 100(4), e02621.

Egan PA, Adler LS, Irwin RE, Farrell IW, Palmer-Young EC & Stevenson PC. (2018). Crop domestication alters floral reward chemistry with potential consequences for pollinator health. Frontiers in Plant Science, 9, 1357.

Egan PA & Price MF. (2017). Mountain ecosystem services and climate change – a global overview of potential threats and strategies for adaptation. UNESCO, Paris.

Muola A, Weber D, Malm LE, Egan PA, Glinwood R, Parachnowitsch AL, & Stenberg JA. (2017). Direct and pollinator-mediated effects of herbivory on strawberry and the potential for improved resistance. Frontiers in Plant Science, 8, 823.

Egan PA, Stevenson PC, Tiedeken EJ, Wright GA, Boylan F & Stout JC. (2016). Plant toxin levels in nectar vary sptatially across native and introduced populations. Journal of Ecology, 104: 1106–1115.                                                         

Tiedeken EJ, Egan PA, Stevenson PC, Wright GA, Brown MJF, Power EF, Farrell I, Matthews SM & Stout JC. (2016). Nectar chemistry modulates the impact of an invasive plant on native pollinators. Functional Ecology, 30: 885–893.

Stout JC, Duffy KJ, Egan PA, Harbourne M. & Hodkinson TR. (2015). Genetic diversity and floral width variation in introduced and native populations of a long-lived woody perennial. AoB Plants, 7: plu087.

Price MF & Egan PA. (2014). Our global water towers: ensuring ecosystem services from mountains under climate change – a policy brief. UNESCO, Paris.

Egan PA & van der Kooy F. (2013). Phytochemistry of the carnivorous Sundew genus Drosera (Droseraceae) – future perspectives and ethnopharmacological relevance. Chemistry & Biodiversity, 10: 1774-1790.

Egan PA & van der Kooy F. (2012). Coproduction and ecological significance of naphthoquinones in carnivorous Sundews (Drosera). Chemistry & Biodiversity, 9: 103-1044.

Egan PA, Pendry CA & Rajbhandary S. (2011). Papaveraceae. In: Flora of Nepal, Volume 3, Royal Botanic Garden Edinburgh, UK.

Egan PA. (2011). Meconopsis autumnalis and M. manasluensis (Papaveraceae), two new species of Himalayan poppy endemic to central Nepal with sympatric congeners. Phytotaxa, 20: 47-56.


Twitter: @Paul_A_Egan

Researcher at the Institutionen för växtskyddsbiologi
Telephone: +4640-415162
Postal address:
Växtskyddsbiologi, Box 102
23053 Alnarp
Visiting address: Sundsvägen 16, Alnarp