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Alex graduated from the University of Aberdeen in 2014 with a BSc (Hons) in Forest Sciences. During his degree, Alex spent a year working for Forestry Commission Scotland in the West Argyll Forest district (2012-2013) as part of the student sandwich placement. After graduating Alex joined Forest Research as an assistant pathology diagnostician in the Tree Health Diagnostic and Advisory Service in 2014.

Prior to starting his degree, Alex studied a National Diploma in Arboriculture (2005-2008).

Pathology Diagnostician
Tree health

Alice Holt

Alice Holt Lodge

Wrecclesham

Farnham

Surrey

Other Research

Advisory and Extension

Peer reviewed journal articles

Pérez-Sierra, A., Chitty, R., Eacock, A., Jones, B., Biddle, M., Crampton, M., Lewis, A., Olivieri, L., Webber, J. (2022) First report of Phytophthora pluvialis in Europe causing resinous cankers on western hemlock. New Dis Rep, 45, 1– 2. https://doi.org/10.1002/ndr2.12064

Romon-Ochoa, P., Kranjec Orlović, J., Gorton, C., Lewis, A., van der Linde, S. & Pérez-Sierra, A. (2022) New detections of chestnut blight in Great Britain during 2019–2020 reveal high Cryphonectria parasitica diversity and limited spread of the disease. Plant Pathology, 71, 793– 804. Available from: https://doi.org/10.1111/ppa.13523

Pérez-Sierra, A., Hardy, C., Chitty, R., Lewis, A. & McCartan, S. (2021) First report of Sirococcus piceicola associated with Sitka spruce seed in Britain. New Disease Reports, 44,e12048. https://doi.org/10.1002/ndr2.12048

Shuttleworth, L., Lewis, A.J., Gorton, C. and Pérez-Sierra A., (2020). Dendrostroma luteum sp. nov. Persoonia. Fungal Planet description sheets: 1042–1111 Persoonia 44, 2020: 301 – 459

Romon-Ochoa, P., Gorton, C., Lewis, A., van der Linde, S., Webber, J. and Pérez-Sierra, A. (2020), Hypovirulent effect of the Cryphonectria hypovirus 1 in British isolates of Cryphonectria parasitica. Pest Manag Sci, 76: 1333-1343. https://doi.org/10.1002/ps.5644

Perez-Sierra, A., Romon-Ochoa, P., Gorton, C., Lewis, A., Rees, H., Van Der Linde, S., Webber, J. 2019. High vegetative compatibility diversity of Cryphonectria parasitica infecting sweet chestnut (Castanea sativa) in Britain indicates multiple pathogen introductions. Plant Pathology, 68: 727-737.

Lewis A, Gorton C, Rees H, Webber J, Pérez-Sierra A, 2017. First report of Gnomoniopsis smithogilvyi causing lesions and cankers of sweet chestnut in the United Kingdom. New Disease Reports 35, 20. [http://dx.doi.org/10.5197/j.2044-0588.2017.035.020]

Pérez-Sierra A., Gorton C., Lewis A., Kalantarzadeh M., Sancisi-Frey S., Brown A.V., Hendry S. 2015. First report of shoot blight caused by Sirococcus tsugae on Atlantic cedar (Cedrus atlantica) in Britain.