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Improving lives by solving problems in agriculture and the environment
Staff image of Tim  Haye

Tim Haye Head Arthropod Biological Control

T: +41 (0)32 4214883


Rue des Grillons 1 CH-2800 Delémont, Switzerland

My role as a research scientist and project coordinator for arthropod biological control at CABI's Swiss centre involves research on classical biological control of insect pests with particular emphasis on host-range assessment and non-target impacts of parasitoids. More recently, I started to work on the impact of climate change on agricultural pests and their natural enemies. My many years’ experience in biological control include project work on agricultural, horticultural and forestry pests, eg. Cabbage Seedpod Weevil, Swede Midge, Lygus Plant Bugs, Brown Marmorated Stink Bug, Lily Leaf Beetle, Western Corn Rootworm, Gypsy Moth and Delia Root Maggots.

I have a broad background in entomology, ecology, behavior and rearing of arthropod biological control agents. I have work experience in Canada, Mexico, India, China and many European countries, where I have conducted field and laboratory experiments and helped to develop methods for integrated pest management of insect pests. I have supervised several international MSc and PhD students from Canadian Universities (eg. Simon Fraser University, Carleton University, University of Manitoba).

Project image: Controlling Japanese knotweed in Great Britain

Controlling earwigs in the Falklands

The European earwig has become a considerable domestic and public nuisance in the Falkland Islands, causing significant problems for local horticulture by decimating many garden vegetable crops. This population explosion is due to the absence of natural enemies that would normally keep them under control. To...
Project image: Controlling Japanese knotweed in Great Britain

Controlling the cabbage seedpod weevil in Canada

The cabbage seedpod weevil is a widely distributed pest of cruciferous crops in Europe and North America, causing substantial economic losses in canola crops in Canada. Current control measures still rely on applying broad-spectrum insecticides. We are collecting European distribution data for a parasitic...
Project image: Controlling Japanese knotweed in Great Britain

Protecting leeks and onions from pests

The invasive leek moth poses a significant and immediate threat to producers of leeks, onions, garlic and chives in North America. The larvae mine the green tissues, reducing the marketability of crops. The pest’s distribution is expanding, with no signs of suppression by indigenous natural enemies. We are...
Project image: Controlling Japanese knotweed in Great Britain

Biological control of brown marmorated stink bug

The brown marmorated stink bug is native to parts of East Asia and is invasive in the US, Canada and Switzerland. Here, it is a serious pest of many fruit trees, shrubs and other plants. Chemical control is often used but, with testing, parasitic wasps from China could be used in North America instead. So we...
Project image: Controlling Japanese knotweed in Great Britain

Biological control of diamondback moth in Canada

The diamondback moth is a global pest. Canadian farmers often have use chemicals to protect their crops. This is costly and the pest is becoming immune, meaning additional control options are needed. In Europe, Asia and Africa, Diadromus collaris, is a major parasitoid of the moth. It has been introduced to...
  1. Wogin, M., Roitberg, B., Haye, T., Gillespie, D.R. (2013) Female-biased sex ratio shifts in a solitary parasitoid and their effects on virginity, population dynamics, and biological control. Entomologia Experimentalis et Applicata 146: 165-176.
  2. Haye, T., Olfert, O., Weiss, R.M., Gariepy, T.D., Broadbent, A.B., Kuhlmann, U. (2013) Bioclimatic analyses of distributions of a parasitoid, Peristenus digoneutis (Hymenoptera: Braconidae), and its host species, Lygus spp. (Hemiptera: Miridae), in Europe and North America. Agricultural and Forest Entomology 15 (1)
  3. Abram, P. K., Haye, T., Mason, P.G., Cappuccino, N., Boivin, G., Kuhlmann, U. (2012) Biology of Synopeas myles, a parasitoid of the swede midge, Contarinia nasturtii, in Europe. BioControl 57: 789–800.
  4. Abram, P. K., Haye, T., Mason, P.G., Cappuccino, N., Boivin, G., Kuhlmann, U. (2012) Identity, distribution, and seasonal phenology of parasitoids of the swede midge, Contarinia nasturtii Kieffer (Diptera: Cecidomyiidae) in Europe. Biological Control 62: 197-205.
  5. Haye, T., Mason, P.G., Dosdall, L., Kuhlmann, U. (2010) Mortality factors affecting the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham), in its area of origin: A life table analysis. Biological Control 54: 331-341.
  6. Whistlecraft, J.W., Haye, T., Kuhlmann, U., Muth, R., Murillo, H., Mason, P. (2010) A large-scale rearing method for Peristenus digoneutis (Hymenoptera: Braconidae), a Biological Control Agent of Lygus lineolaris (Hemiptera: Miridae). Biocontrol Science and Technology 20, 923-937.
  7. Lundgren, J.G., Toepfer, S., Haye, T., Kuhlmann, U. (2010) Haemolymph defence on an invasive herbivore: its breadth of effectivness against predators. Journal of Applied Entomology 134, 439–448.
  8. Haye, T., Kuhlmann, U., Goulet, H. & Mason, P.G. (2006) Controlling Lygus plant bugs with European Peristenus relictus (Hymenoptera: Braconidae) in Canada - risky or not? Bulletin of Entomological Research 96: 187-196.
  9. Haye, T., van Achterberg, C., Goulet, H., Barratt, B.I.P. & Kuhlmann, U. (2006). Potential for classical biological control of the potato bug Closterotomus norwegicus (Gmelin) (Heteroptera: Miridae): description, parasitism, and host specificity of Peristenus closterotomae sp.n. (Hymenoptera: Braconidae). Bulletin of Entomological Research 96: 421-431.
  10. Haye, T., Broadbent, A.B., Whistlecraft, J. & Kuhlmann, U. (2005). Comparative analysis of the reproductive biology of two Peristenus species (Hymenoptera: Braconidae), biological control agents of Lygus plant bugs (Hemiptera: Miridae). Biological Control 32: 442-449
  11. Gariepy, T.D., Kuhlmann, U., Haye, T., Gillott, C. Erlnadson, M. (2005). A single-step multiplex PCR assay for the detection of European Peristenus spp. (Hymenoptera: Braconidae), parasitoids of Lygus spp. (Hemiptera: Miridae). Biological Control Science and Technology 15: 481-495.
  12. Haye, T., Goulet, H., Mason, P.G. & Kuhlmann, U. (2005). Does fundamental host range match ecological host range? A retrospective case study of a Lygus plant bug parasitoid. Biological Control 35: 55-67.
  13. Haye, T. & Kenis, M. (2004). Biology of Lilioceris spp. (Coleoptera: Chrysomelidae) and their parasitoids in Europe. Biological Control 29: 399-408.
  14. Kenis, M., Haye, T., Casagrande, R.A., Gold, M.S. & Tewksbury, L.A. (2003).Selection and importation of European parasitoids for the biological control of the lily leaf beetle in North America, and prospects for control in Europe. In: Van Driesche, R.G. (Ed) Proceedings of the International Symposium on Biological Control of Arthropods, Honolulu, Hawaii, 14-18 January 2002. United States Department of Agriculture, Forest Service, Morgantown, WV, FHTET-2003-05, 416-419.
  15. Olfert, O., Haye, T., Weiss R., Kriticos D. and Kuhlmann U. (2016) Modelling the potential impact of climate change on future spatial and temporal patterns of biological control agents: Peristenus digoneutis as a case study. Canadian Entomologist 148(5), 579–594. Contact: