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Faculty|Department of Plant Sciences

Andrew R. Kniss, Ph.D.

Andrew R. Kniss

Associate Professor

Office: 307-766-3949
Fax: 307-766-5549


2006 - Ph.D. Agronomy, Minor: Statistics, University of Wyoming
2003 - M.S. Agronomy, University of Nebraska - Lincoln
2001 - B.S. Agroecology, University of Wyoming


My research program focuses on developing sustainable weed management programs in agronomic crops, especially sugarbeet, winter wheat, corn, and dry beans. Recent research projects include:

  • long-term management of jointed goatgrass in imidazolinone-resistant (Clearfield) winter wheat
  • synergistic herbicide combinations for management of feral rye
  • new herbicide options in proso millet
  • effect of long-term glyphosate use in glyphosate-resistant (Roundup Ready) cropping systems,
  • use of ethofumesate in glyphosate-resistant (Roundup Ready) sugarbeet,
  • management of volunteer corn in dry beans and sugarbeet.

  • American Society of Sugar Beet Technologists
  • Weed Science Society of America
  • North Central Weed Science Society
  • Western Society of Weed Science
  • Western Society of Crop Science



Odero, D.C., A.O. Mesbah, S.D. Miller, and A.R. Kniss. 2010. Lanceleaf sage (Salvia reflexa) Interference in Sugarbeet. Weed Technology. Accepted March 30, 2010. DOI:10.1614/WT-10-00015.1.

Lyon, D.J. and A.R. Kniss. 2010. Proso millet tolerance to saflufenacil. Weed Technology. Accepted March 26, 2010. DOI:10.1614/WT-D-10-00001.1.

Odero, D.C., A.O. Mesbah, S.D. Miller, and A.R. Kniss. 2010. Wild Buckwheat (Polygonum convolvulus) Interference in Sugarbeet. Weed Technology. 24(1):59-63

Odero, D.C., A.O. Mesbah, S.D. Miller, and A.R. Kniss. 2009. Venice Mallow (Hibiscus trionum) Interference in Sugarbeet. Weed Technology. 23(4):581-585.

Enloe, S.F., and A.R. Kniss. 2009. Does a Diflufenzopyr Plus Dicamba Premix Synergize Russian Knapweed Control with Auxinic Herbicides? Invasive Plant Science and Management. 2(4):318-323.

Enloe, S.F., A.R. Kniss, M. Ferrell, and J. LaFantasie. 2009. Black greasewood (Sarcobatus vermiculatus), gray rabbitbrush (Chrysothamnus nauseosa) and perennial grass response to chlorsulfuron and metsulfuron. Invasive Plant Science and Management. 2:247-252.

Enloe, S.F., and A.R. Kniss. 2009. Influence of Diflufenzopyr Addition to Picolinic Acid Herbicides for Russian Knapweed (Acroptilon repens) Control. Weed Technology. Weed Technology. 23:450-454.

Kniss, A.R., D.J. Lyon, S.D. Miller. 2008. Jointed Goatgrass Management with Imazamox-Resistant Cultivars in a Winter Wheat-Fallow Rotation. Crop Science. 48:2414-2420.

Kniss, A.R., S.D. Miller, P.H. Westra, and R.G. Wilson. 2007. Glyphosate susceptibility in common lambsquarters (Chenopodium album) is influenced by parental exposure. Weed Science. 55:572-577.

Wilson, R.G., S.D. Miller, P.H. Westra, A.R. Kniss, P.W. Stahlman, G.A. Wicks, and S.D. Kachman. 2007. Glyphosate-Induced Weed Shifts in Glyphosate-Resistant Corn or a Rotation of Glyphosate-Resistant Corn, Sugarbeet and Spring Wheat. Weed Technology. 21:900-909.

Lyon, D.J., A. Kniss, and S.D. Miller. 2007. Carfentrazone Improves Broadleaf Weed Control in Proso and Foxtail Millets. Weed Technology. 21:84-87.

Larson, R.L, A.L. Hill, A. Fenwick, A.R. Kniss, L.E. Hanson and S.D. Miller. 2006. Influence of glyphosate on Rhizoctonia and Fusarium root rot in sugar beet. Pest Management Science. 62:1182-1192.

Kniss, A.R., R.G. Wilson, A.R. Martin, P.A. Burgener, and D.M. Feuz. 2004. Economic evaluation of glyphosate-resistant and conventional sugarbeet (Beta vulgaris). Weed Technology. 18(2):388-396.

Extension Bulletins:

Kniss, A.R. 2007. Sugar Industry Biotech Council Weed Resistance Learning Module. Available online at:

Miller, S.D., R.G. Wilson, A.R. Kniss, and C.M. Alford. 2006. Roundup Ready Alfalfa: A New Technology for High Plains Hay Producers. University of Wyoming Extension Bulletin B-1173.

Kniss, A.R., C.M. Alford, and S.D. Miller. 2005. Irrigation Management in Sunflowers. University of Wyoming Extension Bulletin B-1166.

Kniss, A.R., S.D. Miller, R.G. Wilson, and P.H. Westra. 2004. Roundup Ready Crop Use Recommendations for the High Plains. University of Wyoming Extension Bulletin B-1057.

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