Montana State University

Dr. David Weaver

Land Resources and Environmental Sciences
Montana State University
334 Leon Johnson Hall
Bozeman, MT 59717

Tel: (406) 994-7608
Fax: (406) 994-3933

Dr. David K. Weaver
Associate Professor

Current Research

Wheat stem sawfly chemical ecology, biological control, pathology, and host plant resistance;
Stored-product entomology: faunistic study and aeration as a management tool;
Assess release-site establishment of the biocontrol agent Mecinus janthinus on Dalmatian toadflax



Research in my laboratory is primarily focused on developing new techniques and tools for wheat stem sawfly management. This insect is the most economically important pest of wheat in Montana, with annual losses exceeding $20 million. Insecticides are not a viable option for control of this insect, and current management of sawfly is driven by the planting of solid-stem wheat, which is resistant to stem lodging and causes variable mortality in the immature stages. Therefore, we are investigating insect and host plant chemical ecology, biological control, pathogens, and new sources of host plant resistance to incorporate in a non-insecticide, integrated pest management program (IPM) for this insect, which will be framed around the existing use of solid-stem varieties.

We are also researching stored-product insect populations in Montana grain storage facilities. Montana has fewer problems with losses in storage than most states, due primarily to climate, elevation, and late harvests. However, significant problems can occur especially from improperly stored grain. We are concentrating our research efforts in three areas: 1) characterizing the composition of the pest insect complex in Montana grain stores, 2) using automated aeration to chill the grain at first storage to manage the immigrating pests, and 3) field-testing new monitoring tools that greatly reduce the need to routinely sample the stored mass.

A third area of research is to measure the impact of the biological control agent Mecinus janthinus on populations of the noxious weed, Dalmation toadflax, at a number of release sites established throughout the state. These sites will ultimately serve as insectary sites for the redistribution of this agent. At this time, populations are not sufficient for this purpose. Therefore, we are measuring classical and innovative parameters to document impacts of the plant-insect interactions at these sites.

David checks sawfly traps

Academic Rank

Associate Professor of Entomology
Department of Land Resources and Environmental Sciences, Montana State University



Ph.D., Entomology, McGill University, Montreal, Québec, Canada, 1990
B.S., Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada, 1984


Professional Experience

Associate Professor of Entomology, Montana State University, 2002 - present
Research Assistant and Associate Professor, Department of Entomology, Montana State University, 1997 - 2002
Research Entomologist, USDA-ARS, CMAVE, Gainesville, FL; SPIRDL, Savannah, GA 1992 - 1997
Postdoctoral Research Associate, Department of Entomology, Montana State University, 1990 - 1992


Editorial Boards

Editor-In-Chief, Journal of Agricultural and Urban Entomology, 1998 - 2002
Subject Editor - Journal of Agricultural Entomology, 1997 - 1998, 2002 - present
Subject Editor – Journal of the Entomological Society of Argentina, 2006 - present



Shuman, D., D. K. Weaver, and A. Dagan. 2002. Automated counting insect electrocutor. U.S. Patent No. 6,493,363
Dunkel, F. V., D. K. Weaver, and T. W. Weaver III. 1997. Insecticidal or insect behaviorally active preparations from aromatic plants. U.S. Patent No. 5,591,435
Dunkel, F. V., D. K. Weaver, and T. W. Weaver III. 1994. Insecticidal or insect behaviorally active preparations from aromatic plants. U.S. Patent No. 5,306,497


Selected Recent Grants and Agreements

USDA, CSREES, RAMP, “Research and extension on the integrated management of wheat stem sawfly, Fusarium crown rot, and grassy weeds in the Northern Great Plains”, October 1, 2007 – September 30, 2011. Co-P.I. with F. D. Menalled, A. T. Dyer, R. D. Smith, D. M. Woods, E. D. Eriksmoen, J. M. Alvarez, and J. M. Windes. $425,880

USDA, CSREES, AFRI, “Exploiting antixenosis in wheat blends for improved pest management”, October 1, 2009 – December 31, 2012. Co-P.I. with J.E. Sherman and L.E. Talbert $320,500 (Weaver – Lead PD)

Montana Wheat and Barley Committee “Wheat Stem Sawfly IPM: Developing New Forms of Host Plant Resistance and Implementing IPM Systems Statewide” July 1, 2011 – June 30, 2012 $195,000 (Weaver – Lead PD)


Courses Taught

ENTO 520 – Graduate Insect Physiology

AGSC 401 – Integrated Pest Management

Conservation and Augmentation Biological Control
Current Issues in Insect Chemical Ecology


Graduate Advisees and Postdoctoral Researchers

CURRENTLY: 3 M. S. Candidates; serve on 5 graduate student committees
GRADUATED: 4 Ph. D. (2004-2009), 6 M. S. (2001 – 2010); served on 6 graduate student committees
POSTDOCTORAL RESEARCHERS: Currently 3 staff members, 6 previous staff members from 2001- 2010


Professional Memberships

Entomological Society of America, Entomological Society of Canada, Georgia Entomological Society
South Carolina Entomological Society, Sigma Xi



USDA, ARS Office of Scientific Quality, Reviewer.

Montana Weed Control Association Biological Control Committee, 2003-present

Montana Interagency Weed Biological Control Committee, 2004-present

Academic Affairs Committee, Montana State University, 2004-present

Grievance Committee Member, College of Agriculture, Montana State University, 2003-present

Faculty Council Liaison to Graduate Council, Montana State University, 2003-present

Faculty Council Representative for Department of Entomology, Montana State University, 2003-2005

Faculty Council Representative for Department of LRES, Montana State University, 2005-present

Serve as an ad-hoc reviewer for USDA, CSREES, SBIR and USDA, ARS, CRIS proposals and projects since 1997

Serve as an ad-hoc reviewer for NSERC ( Canada) since 2005

Review Manuscripts for: Environmental Entomology, Journal of Economic Entomology, Journal of Insect Physiology, Journal of Stored Products Research, Journal of Chemical Ecology, Biological Control, Journal of Insect Science, Journal of the Entomological Society of Argentina, Journal of Applied Entomology, Pest Management Science, International Miller


Publications Summary

6 book chapters, 133 scientific papers (92 refereed journal articles)


Presentations Summary (1988-2011)

331 Total
65 Invitations
124 Extension (6970 contact hours)


Grants received 1998 – present: ≈ $7,750,000

Publications 2007-2012 

Macedo, T. B., D. K. Weaver, and R. K. D. Peterson. 2007. Photosynthesis in wheat at the grain filling stage is altered by larval wheat stem sawfly (Hymenoptera: Cephidae) injury and water limitation. Journal of Entomological Science 42: 228-238.

Macedo, T. B., R. K. D. Peterson, C. L. Dausz, and D. K. Weaver. 2007. Photosynthetic responses of wheat, Triticum aestivum L., to defoliation patterns on individual leaves. Environmental Entomology 36: 602-608.

Piesik, D., A. Wenda-Piesik, D. K. Weaver, and W. L. Morrill. 2007. Influence of Fusarium crown rot disease on semiochemical production by wheat plants. Journal of Phytopathology 155: 488-496.

Pariera Dinkins, C. L., R. K. D. Peterson, J. E. Gibson, Q. Hu, and D. K. Weaver. 2008. Glycoalkaloid responses of potato (Solanum tuberosum) to Colorado potato beetle defoliation. Food and Chemical Toxicology 46: 2832-2836.

Piesik, D., D. K. Weaver, J. B. Runyon, M. Buteler, G. E. Peck , and W. L. Morrill. 2008. Behavioural responses of wheat stem sawflies to wheat volatiles. Agricultural and Forest Entomology. 10: 245-253.

Buteler, M., D. K. Weaver, and P. R. Miller. 2008. Wheat stem sawfly infested plants benefit from parasitism of the herbivorous larvae. Agricultural and Forest Entomology 10: 347-354; Corrigendum 11:123.

Delaney, K. J., J. Perez-Mendoza, and D. K. Weaver. 2008. A comparison of wheat stem sawfly adult emergence from material overwintered in the field and in the laboratory. Canadian Entomologist 140: 569-572.

Macedo, T. B., R. K. D. Peterson, D. K. Weaver, and X. Ni. 2009. Impact of Diuraphis noxia (Mordvilko) and Rhopalosiphum padi (L.) (Hemiptera: Aphididae) on primary physiology of four near-isogenic wheat lines. Journal of Economic Entomology 102: 412-421.

Nansen, C., T. B. Macedo, R. M. Swanson, and D. K. Weaver. 2009. Use of spatial structure analysis of hyperspectral data cubes for detection of insect-induced stress in wheat plants. International Journal of Remote Sensing. 30: 2447-2464.

Wenda-Piesik, A., Z. Sun, W. E. Grey, D. K. Weaver, and W. L. Morrill. 2009. Mycoses of wheat stem sawfly (Hymenoptera: Cephidae) larvae by Fusarium spp. isolates. Environmental Entomology. 38: 387-394.

Weaver, D. K., M. Buteler, M L. Hofland, J. B. Runyon, C. Nansen, L. E. Talbert, P. Lamb, and G. R. Carlson. 2009. Cultivar preferences of ovipositing wheat stem sawflies as influenced by the amount of volatile attractant. Journal of Economic Entomology. 102: 1009-1017.

Piesik, D., A. Wenda-Piesik, D. K. Weaver, T. B. Macedo, and W. L. Morrill. 2009. Influence of Fusarium infection and wheat stem sawfly infestation on volatile metabolites collected from wheat plants. Journal of Plant Protection Research. 49: 167-174.

Buteler, M., D. K. Weaver, and R. K. D. Peterson. 2009. Exploring the oviposition behavior of the wheat stem sawfly when encountering plants infested with cryptic conspecifics. Environmental Entomology 38: 1707-1715.

Sherman, J. D., D. K. Weaver, M. Hofland, S.E. Sing, M. Buteler, S. P. Lanning, Y. Naruoka, N. K. Blake, J. M. Martin, P. F. Lamb, G. R. Carlson, and L. E. Talbert. 2010. Identification of novel QTL for sawfly resistance in wheat. Crop Science 50:73-86.

Delaney, K. J., D. K. Weaver, and R. K. D. Peterson. 2010. Wheat photosynthesis and yield reductions: wheat stem sawfly (Hymenoptera: Cephidae) herbivory interacts with abiotic conditions and host plant resistance. Journal of Economic Entomology 103:516-524.

Stadler, T., Buteler, M., and D. K. Weaver. 2010. Novel use of nanostructured alumina as an insecticide. Pest Management Science 66:577-579.

Goodwin, K. M. , R. E. Engel, and D. K. Weaver. 2010. Detection dogs outperform human surveyors in the detection of rare spotted knapweed (Centaurea stoebe). Invasive Plant Science and Management 3:113-121.

Buteler, M. , D. K. Weaver, P. L. Bruckner, G. R. Carlson, J. E. Berg, P. F. Lamb. 2010. Identification of winter wheat cultivars suitable as trap crops for the wheat stem sawfly based on screening using agronomic traits and semiochemical production. Canadian Entomologist 142: 222-233.

Stadler, T., M. Buteler and D. K. Weaver. 2010. FORO: Nanoinsecticidas: Nuevas perspectivas para el control de plagas (FORUM: Nanoinsecticides: New perspectives on insect pest control). Revista de la Sociedad Entomológica Argentina 69: 149-156.

Blake, N. K., R. N. Stougaard, D. K. Weaver, J. D. Sherman, S. P. Lanning, Y. Naruoka, Q. Xue J. M. Martin and L. E. Talbert. 2011. Identification of a quantitative trait locus for resistance to the orange wheat blossom midge in spring wheat. Plant Breeding 130: 25-30.

Piesik, D., D. Panka, K. J. Delaney, A. Skoczek, R. Lamparski, and D. K. Weaver. 2011. Cereal crop volatile organic compound induction after mechanical injury, beetle herbivory (Oulema spp.), or fungal infection (Fusarium spp.). Journal of Plant Physiology 168: 878-886.

Beres, B. L., L. M. Dosdall, D. K. Weaver, D. M. Spaner and H. A. Carcamo. 2011. The biology and integrated management of wheat stem sawfly, Cephus cinctus (Hymenoptera: Cephidae), and the need for continuing research. C. P. Alexander Review Series. Canadian Entomologist 143: 105 - 125.

Schat , M., S. E. Sing, R. K. D. Peterson, F. D. Menalled and D. K. Weaver. 2011. Growth inhibition of Dalmatian toadflax, Linaria dalmatica (L.) Miller, in response to herbivory by the biocontrol agent Mecinus janthinus Germar. Journal of Entomological Science 46: 232-246.

Peterson, R. K. D., M. Buteler, D. K. Weaver, T. B. Macedo, Z. Sun , O. G. Perez , G. R. Pallipparambil. 2011. Parasitism and the Demography of Wheat Stem Sawfly Larvae, Cephus cinctus. Biocontrol. 56: 831-839.

Stadler, T., M. Buteler, D. K. Weaver, S. Sofie. 2012. Comparative toxicity of nanostructured alumina and a commercial inert dust forSitophilus oryzae (L.) and Rhyzopertha dominica (F.) at varying ambient humidity levels. Journal of Stored Product Research. 48: 81-90.