Ph.D. 2008, Ecology and Environmental Science, Montana State University; M.S., 1994, Civil and Environmental Engineering, Tennessee Technological University; B.S. 1993, Civil Engineering, Clemson University. My research broadly address agroecology and invasive plant species ecology issues including: (1) crop-weed-pest interactions, (2) ecological impacts of invasive plant species including altered soil chemistry, effects on plant community composition, and effects on multitrophic interactions including fungi, viruses, biological controls, and pollinators, (3) impacts of fire and climate change on cheatgrass invasion, and (4) effects of climate change on crop-weed-disease interactions.

Recent Publications

  • Miller, ZJ,Lehnhoff, EA, Menalled, FD, and Burrows, M. In press. Effects of nitrogen and CO2 fertilization on the epidemiology of Wheat streak mosaic virus. Plant Disease.
  • Lehnhoff, EA, Miller, ZJ, Menalled, FD, Ito, D, and Burrows, M. In Press. Wheat and barley susceptibility and tolerance to multiple isolates of Wheat streak mosaic virus. Plant Disease.
  • Barroso, J, Miller Z., Lehnhoff, EA, Hatfield, PG, and Menalled, FD. 2015. Impacts of cropping system and management practices on the assembly of weed communities. Weed Research, 55:426-435
  • Keith, B, EA Lehnhoff, E Burns, FD Menalled, and W Dyer. In Press. Characterization of Avena fatua L. populations with resistance to five herbicide modes of action. Weed Research.
  • Herron-Sweet, CR, Mangold, JM, Lehnhoff, EA, Littlefield, JL, and Burkle, LA. 2015. Native parasitoids associated with the biological control agents of Centaurea stoebe in Montana, USA. Biological Control, 86:20-27.
  • Ward, S, RD Cousens, MV Bagavathiannan, JN Barney, HJ Beckie, R Busi, AS Davis, JS Dukes, F Forcella, RP Freckleton, ER Gallandt, LM Hall, M Jasieniuk, A Lawton-Rauh, EA Lehnhoff, M Liebman, BD Maxwell, MB Mesgaran, JV Murray, P Neve, MA Nuñez, A Pauchard, SA Queenborough, BL Webber. 2014. Agricultural weed research: a critique and two proposals. Weed Science 62: 672-678.
  • Lehnhoff, EA, ZJ Miller, MJ Brelsford, S White, and BD Maxwell. 2013. Relative canopy height influences wild oat (Avena fatua) seed viability, dormancy, and germination. Weed Science, 51:564-569.
  • Irvine, KM, VM Backus, MG Hohmann, EA Lehnhoff, BD Maxwell, K Michels, and LJ Rew. 2013. A comparison of adaptive sampling designs and estimation methods for autologistic regression: a simulation study using a census of Bromus inermis.  Environmentrics 24:407-417.
  • Lehnhoff, EA, BK Keith, WE Dyer, and FD Menalled. 2013. Impact of biotic and abiotic stresses on the competitive ability of multiple herbicide resistant wild oat (Avena fatua). PLOS One Volume 8, Issue 5.
  • Lehnhoff, EA, BK Keith, WE Dyer, RK. Peterson, and FD Menalled. 2013. Characterization of multiple herbicide resistance in wild oat (Avena fatua) and its impacts on physiology, germinability, and seed production. Agronomy Journal, 105:854-862.
  • Lehnhoff, EA, FD Menalled. 2013. Impacts of Tamarix-mediated soil changes on restoration plant growth. Applied Vegetation Science, 16:438-447.
  • Murray, JV, EA Lehnhoff, P Neve, SL Poggio and BL Webber.  2012. ‘Raising the bar’: improving the standard and utility of weed and invasive plant research. New Phytologist 196:678-680.
  • Lehnhoff, EA, LJ Rew, C Zabinski and FD Menalled. 2012. Reduced impact or longer lag phase? Tamarix in the northwestern United States. Wetlands 32:497-508.
  • Lehnhoff, EA, FD Menalled and LJ Rew. 2011.Tamarisk (Tamarix spp.) establishment in its most northern range. Invasive Plant Science and Management 4:58-65. 

Recent Grants

  • Montana Noxious Weed Trust Fund. 2015. $45,410. Managing dense cheatgrass infestations on rangeland, and understanding its impacts under an altered climate. EA Lehnhoff, LJ Rew, TF Seipel, FD Menalled, P Hatfield and J Mangold.
  • Montana Noxious Weed Trust Fund. 2014. $30,000. Mitigating the impact of cheatgrass under a changing climate. EA Lehnhoff, LJ Rew, and TF Seipel.
  • Montana Noxious Weed Trust Fund. 2013. $39,273. Impacts of fire and grazing on cheatgrass populations in Montana. Lehnhoff, EA, LJ Rew, and TF Seipel.
  • National Institute of Food and Agriculture (USDA). 2012. $150,000. Investigating multi-trophic interactions between invasive plants and insects to enhance native forage production on western rangeland. Mangold, J, EA Lehnhoff, L Burkle and J. Littlefield.
  • National Institute of Food and Agriculture (USDA). 2012.  $500,000. Molecular, physiological, and ecological characterization of multiple herbicide resistance in Avena fatua. Dyer, WE, FD Menalled, BD Maxwell, EA Lehnhoff and B Keith. 

Recent Teaching

  • LRES 543 – Ecology of Plants and Plant Communities (Fall 2012, 2013, 2014)