Rebecca Hallett


Adult Tarnished plant bug


Cindy monitoring for Tarnished plant bug

Invasive species; integrated pest management; chemical ecology; insect-plant interactions; host plant resistance; applied ecology

Research Interests Related to this Project:

Insect pests of field and horticultural crops, particularly pests of cruciferous crops (swede midge, cabbage seedpod weevil, crucifer flea beetle, cabbage maggot, diamondback moth) and invasive species (swede midge, soybean aphid, multicoloured Asian ladybeetle). Factors affecting population dynamics and success of insect pests.  Manipulation of insect-plant interactions to achieve pest management with reduced reliance on pesticides. Development of integrated pest management programs, including optimization of monitoring protocols particularly using pheromones. Elucidation of plant cues used in insect host finding and selection and defensive host plant compounds.

Graduate Students Related to this Project:


Population dynamics and modeling, soybean aphid, natural enemies, integrated pest management

Population dynamics of the soybean aphid.


Carabidae, natural enemies, biological control

Importance of Carabidae as predators of pest insects in Ontario agroecosystems.


Parasitoids of soybean aphids, compatibility of pesticides with natural enemies, chemical ecology, physiology

Ecology of Aphelinus sp., a parasitoid of the soybean aphid, in relation to soybean management practices.


Multicoloured Asian ladybeetle, grapes, wine, chemical ecology, integrated pest management

Response of multicoloured Asian ladybeetle to wine grape volatiles, and their use in pest management.



Tarnished plant bug, resistance

Investigating the basis of resistance to the tarnished plant bug in wild and cultivated strawberries.


Insect-plant interactions, polyphagy, host plant selection

Host plant preference of the pea leafminer, Liriomyza huidobrensis, in Ontario.

Postdocs Related to this Project:


Soybean aphid, natural enemies, integrated pest management, dynamic action thresholds, chemical ecology

Development of a dynamic action threshold for the soybean aphid

Recent Publications Related to this Project:

Mika, A.M., Weiss, R.M., Olfert, O., Hallett, R.H., and J.A. Newman. 2008. Will climate change be beneficial or detrimental to swede midge in North America? Contrasting predictions using climate projections from different general circulation models. Global Change Biology, in press.

 Dale, A., Galic, D., and R.H. Hallett. 2008. Fragaria virginiana resists tarnished plant bug. Entomologia Experimentalis et Applicata, 126: 203-10.

Hallett, R.H., S.A. Goodfellow and J.D. Heal. 2007. Monitoring and detection of the swede midge (Diptera: Cecidomyiidae). The Canadian Entomologist, 139: 700-712.

Hallett, R.H. 2007. Host plant susceptibility to the swede midge (Diptera: Cecidomyiidae). Journal of Economic Entomology, 100: 1335-1343.

Olfert, O.O., Hallett, R.H., Weiss, R., Soroka, J.J. and S. Goodfellow. 2006. Potential distribution and relative abundance of swede midge, Contarinia nasturtii (Diptera: Cecidomyiidae), an invasive pest in Canada. Entomologia Experimentalis et Applicata, 120: 221-228.

Bahlai C., Goodfellow S., Stanley-Horn, D.E. and R.H. Hallett. 2006. Endoparasitoid assemblage of the pea leafminer, Liriomyza huidobrensis (Diptera: Agromyzidae), in southern Ontario. Environmental Entomology, 35: 351-357.

Martin, A.D., Vernon, R.S. and R.H. Hallett. 2005. Influence of colour and trap height on captures of adult pea leafminer, Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae), in celery. Journal of the Entomological Society of Ontario, 136: 25-35.

Martin, A.D., D.E. Stanley-Horn, and R. H. Hallett. 2005. Adult host preference and larval performance of Liriomyza huidobrensis (Diptera: Agromyzidae) on selected hosts. Environmental Entomology, 34: 1170-1177.

Martin, A.D., R. H. Hallett, M. K. Sears, and M. R. McDonald. 2005. Overwintering ability of Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae), in southern Ontario, Canada. Environmental Entomology, 34: 743-747.

Hallett, R.H., H. Ray, J.J. Soroka, and M.Y. Gruber. 2005. Bioassay for assessing resistance of Arabidopsis thaliana L. (Heynh.) to the adult crucifer flea beetle, Phyllotreta cruciferae (Goeze) (Coleoptera: Chrysomelidae). Canadian Journal of Plant Science, 85: 225-235.

Hallett, R.H., B.J. Crespi, and J.H. Borden. 2004. Synonymy of Rhynchophorus ferrugineus (Olivier) 1790 and R. vulneratus (Panzer) 1798 (Coleoptera, Curculionidae, Rhynchophorinae).  Journal of Natural History, 38: 2863-2882.

Henderson, A.M., R.H. Hallett, and J.J. Soroka. 2004. Pre-feeding behavior of the crucifer flea beetle, Phyllotreta cruciferae, on host and non-host crucifers. Journal of Insect Behavior, 17:17-39.

Beninger, C.W., M.M. Abou-Zaid, A.L.E. Kistner, R.H. Hallett, M.J. Iqbal, B. Grodzinski and J.C. Hall. 2004. A flavanone and two phenolic acids from Chrysanthemum morifolium with phytotoxic and insect growth regulating activity. Journal of Chemical Ecology, 30:589-606.