The Spruce Budworm Early Intervention Strategy project funds research that increases our knowledge and understanding about spruce budworm populations in Eastern Canada.  Below, are a selection of publications by collaborating researchers.

Follow the links in the titles to pages containing the abstracts and download instructions.  Most publications are in English only.

Selected Publications

Bouchard, M., J. Régnière, P. Therrien. Bottom-up factors contribute to large-scale synchrony in spruce bduworm populations. Canadian Journal of Forest Research. 48 : 277-284.

Bouchard, M., Martel, V., Régnière, J., Therrien, P., Correia, D. 2018. Do natural enemies explain fluctuations in low-density spruce budworm populations? Ecology 99: 2047-2057.

De Grandpré L., D.S. Pureswaran, M. Bouchard and D. Kneeshaw. 2018. Climate-induced range shifts in boreal forest pests: ecological, economic and social consequences. Canadian Journal of Forest Research. 48: v-vi.

Carleton, R.D., E. Owens, H. Blaquière, S. Bourassa, J. Bowden, J.-N. Candau, I. DeMerchant, Edwards, A. Heustis, P.M.A. James, A.M. Kanoti, C.J.K. MacQuarrie, V. Martel, E. Moise, D.S. Pureswaran, E. Shanks, R.C. Johns. 2019. Tracking insect outbreaks: a case study of community-assisted moth monitoring using sex pheromone traps. FACETS. 5: 1.

Johns, R.C., J.J. Bowden, R.D. Carleton, B.J. Cooke, S. Edwards, E.J.S. Emilson, P.M.A. James, Kneeshaw, D.A. MacLean, V. Martel, E.R.D. Moise, D.G. Mott, C.J. Norfolk, E. Owens, D.S. Pureswaran, D.T. Quiring, J. Régnière, B. Richard, M. Stastny. 2019. A conceptual framework for the spruce budworm Early Intervention Strategy: can outbreaks be stopped? Forests (Special Issue). 10: 910.

Larroque, J., S. Legault, R.C. Johns, L. Lumley, M. Cusson, P.M.A. 2019. James. Temporal variation in spatial genetic structure during population outbreaks: distinguishing among different potential drivers. Evolutionary Applications. 12: 1931-1945.

Larroque, J., R.C. Johns, J. Canape, B. Morin, M.A., James. 2020. Spatial genetic structure at the leading edge of a spruce budworm outbreak: the role of dispersal in outbreak spread. Forest Ecology and Management. 461: 1.

MacDonnell, M., S. Edwards, S.B. Heard, D.S. Pureswaran, R.C. Johns. Interguild interactions between a non-native phloem feeder and a native outbreaking defoliator. Ecological Entomology. 45: 697-708.

MacLean, D.A., P. Amirault, L. Amos-Binks, D. Carleton, C. Hennigar, R.C. Johns, J. Régnière. Positive results of an early intervention strategy to suppress a spruce budworm outbreak after five years of trials. Forests (Special Issue). 10:448.

Martel, V., R.C. Johns, L. Jochems-Tanguay, F. Jean, A. Maltais, S. Trudeau, M. St-Onge, D. Cormier, S.M. Smith, J. Boisclair. 2020. The use of UAV to release the egg parasitoid Trichogramma spp. (Hymenoptera: Trichogrammatidae) against an agricultural and a forest pest in Canada. Economic Entomology (special Issue). In press.

Moise, E.R.D., M.B. Lavigne, R.C. Johns. 2019. Density has more influence than drought on spruce budworm (Choristoneura fumiferana) performance under outbreak conditions. Forest Ecology and Management. 433: 1870-175.

Nenzén, H.K., Martel, V., Gravel, D. 2018. Can hyperparasitoids cause large-scale outbreaks of insect herbivores? Oikos 127: 1344-1354

Nisole, A., D. Stewart, G. Kyei-Poku, M. Nadeau, S. Trudeau, P. Huron, A. Djoumad, S. Kamenova, M. A. Smith, E. Eveleigh, R.C. Johns, V. Martel, M. Cusson. 2020. Identification of spruce budworm natural enemies using a qPCR-based molecular sorting approach. Forests. 11: 621.

Pureswaran, D.S., M. Neau, M. Marchand, L. De Grandpré, and D. Kneeshaw. Phenological synchrony between spruce budworm and its host trees increases with temperature in warm microclimates in the boreal forest. 2019. Ecology and Evolution. 9: 576-86.

Quiring, D., L. Flaherty, G. Adams, A. MacCartney, J. D. Miller, S. Edwards. 2019. An endophytic fungus interacts with crown level and larval density to reduce the survival of eastern spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae), on white spruce (Picea glauca). Canadian Journal of Forest Research. 49: 221-227.

Régnière, J., Seehausen, M.L., Martel, V. 2020. Modeling climatic influences on three parasitoids of low-density spruce budworm populations. Part 1: Tranosema rostrale (Hymenoptera: Ichneumonidae). Forests 11: 846.

Régnière, J., Saint-Amant, R., Thireau, J.C., Therrien, P., Martel, V. 2021. Modeling Climatic Influences on Three Parasitoids of Low-Density Spruce Budworm Populations. Part 2: Meteorus trachynotus (Hymenoptera: Braconidae). Forests 12: 155.

Régnière Saint-Amant, R., Thireau, J.C., Therrien, P., Martel, V. In prep. Modeling Climatic Influences on Three Parasitoids of Low-Density Spruce Budworm Populations. Part 3: Actia interrupta (Diptera: Tachinidae).

Seehausen, M.L., Régnière, J., Martel, V., Smith, S.M. 2016. Seasonal parasitism and host instar preference by the spruce budworm (Lepidoptera: Tortricidae) larval parasitoid Tranosema rostrale (Hyemnoptera: Ichneumonidae). Environmental Entomology 45: 1123-1130.

Seehausen, M.L., Labrecque, M., Martel, V., Régnière, J., Mansour, A. & Smith, S.M. 2016. Reproductive biology and behavior of Tranosema rostrale (Hymenoptera: Ichneumonidae), a parasitoid of low-density spruce budworm (Lepidoptera: Tortricidae) populations. Journal of Insect Behaviour 29: 500-514.

Seehausen, M.L., Cusson, M., Régnière, J., Bory, M., Stewart, D., Djoumad, A., Smith, S.M., Martel, V. 2017. High temperature induces downregulation of polydnavirus gene transcription in lepidoptera host and enhances accumulation of host immunity gene transcripts. Journal of Insect Physiology 98: 126-133.

Seehausen, M.L.; Régnière, J.; Martel, V.; Smith, S.M. 2017. Developmental and reproductive responses of the spruce budworm (Lepidoptera: Tortricidae) parasitoid Tranosema rostrale (Hymenoptera: Ichneumonidae) to temperature. Journal of Insect Physiology 98: 38-46.

Seehausen, M.L., Naumann, P.H., Béliveau, C., Martel, V., Cusson, M. 2018. Impact of rearing temperature on encapsulation and the accumulation of transcripts putatively involved in capsule formation in a parasitized lepidopteran host. Journal of Insect Physiology 107: 244-249.

Stead, L., S.B. Heard, R.C. Johns. 2021. Life history trade-offs in host choice for a specialist foliovore, spruce budworm (Choristoneura fumiferana). Ecological Entomology, In press.

Zhang, B., D.A. MacLean, R.C. Johns, E.S. Eveleigh. 2018. Effects of Hardwood Content on Balsam Fir Defoliation during the Building Phase of a Spruce Budworm Outbreak. Forests (Special Issue). 9: 530.

Zhang, B., D.A. MacLean, R.C. Johns, E.S. Eveleigh,, S. Edwards. 2019. Hardwood-softwood composition influences early-instar larval dispersal mortality during a spruce budworm outbreak. Forest Ecology and Management. 463: 118035