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Agricultural Research Service United States Department of Agriculture
 
Martin Williams II
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Martin M. Williams II
Ecologist, Invasive Weed Management Unit, USDA-ARS
Assistant Professor, Crop Sciences, University of Illinois
Adjunct Professor, Natural Resources and Environmental Sciences, University of Illinois
Phone: (217)244-5476
Email:mmwillms@uiuc.edu

  
  • B.S., Truman State University, Biology, 1993
  • M.S., University of Nebraska, Agronomy (Weed Ecology), 1997
  • Ph.D., University of Nebraska, Agronomy (Weed Ecology), Biometry minor, 2000
Research Interests

The goal of my research is optimization of integrated weed management systems by applying safe technologies within the framework of fundamental ecological principles. Study systems are defined by major vegetable and rotation crops, and the predominant weed species that invade these systems. In order to develop robust, inference-based weed management systems, knowledge on crop and weed dynamics is seminal. Due to limited basic information on weeds in vegetables, the initial approach is to quantify several aspects of crop/weed interactions. Results of field-based, multi-site interference studies are being used to parameterize deterministic models of crop/weed competition. These aid weed management decision making by identifying conditions when the crop is susceptible to losses in yield and quality, as well as implications to weed fitness. Furthermore, emerging biological, cultural, and chemical technologies are being examined for their potential role, individually and in a combined approach, in vegetable/rotation cropping systems.

Refereed Publications

Williams, MM II, C.V. Ransom, W.M. Thompson. Duration of volunteer potato interference in bulb onion. Weed Science. (submitted 4/5/04)

Williams, M.M. II, D.B. Walsh, and R.A. Boydston. Integrating arthropod herbivory and reduced herbicide use for weed management. Weed Science. (accepted).

Williams, M.M. II, C.V. Ransom, and W.M. Thompson. Effect of volunteer potato density on dry bulb onion yield and quality. Weed Science. (in press).

Boydston, R.A. and Williams, M.M. II. Combined effects of Aceria malherbae and herbicides on field bindweed growth. Weed Science 52:297-301. 2004.

Dille, J.A., Milner, M., Groeteke, J., Mortensen, D.A. and Williams, M.M. II. How good is your weed map? A comparison of spatial interpolators. Weed Science 51:44-55. 2003.

Boydston, R.A. and Williams, M.M. II. Effect of soil fumigation on volunteer potato (Solanum tuberosum) tuber viability. Weed Technology 17:352-357. 2003.

Williams, M.M. II and Boydston, R.A. Effect of shoot removal during tuberization on volunteer potato (Solanum tuberosum) tuber production. Weed Technology 16:617-619. 2002.

Williams, M.M. II, Mortensen, D.A., Waltman, W.J. and Martin, A.R. Spatial inference of herbicide bioavailability using a geographic information system. Weed Technology 16:603-611. 2002.

Gerhards, R., Sökefeld, M., Timmermann, C., Kübauch, W. and Williams, M.M. II. Site-specific weed control in maize, sugar beet, winter wheat and winter barley. Precision Agriculture 3:25-35. 2002.

Williams, M.M. II, Mortensen, D.A., Martin, A.R. and Marx, D.B. Within-field soil heterogeneity effects on herbicide-mediated crop injury and weed biomass. Weed Science 49:798-805. 2001.

Williams, M.M. II and Mortensen, D.A. Crop/weed outcomes from site-specific and uniform soil-applied herbicide applications. Precision Agriculture 2:377-388. 2001.

Williams, M.M. II, Gerhards, R. and Mortensen, D.A. Two-year weed seedling population responses to a postemergent method of site-specific weed management. Precision Agriculture 2:247-263. 2001.

Williams, M.M. II, Gerhards, R. and Mortensen, D.A. Spatiotemporal outcomes of site-specific weed management in maize. Pages 897-906. in J.V. Stafford, ed. Precision Agriculture ’99. Sheffield, United Kingdom: Sheffield Academic Press. 1999.

Gerhards, R., Sökefeld, M., Timmermann, C., Reichart, S., Kühbauch, W. and Williams, M.M. II. Results of a 4-year study on site-specific herbicide application. Pages 689-697. in J.V. Stafford, ed. Precision Agriculture ’99. Sheffield, United Kingdom: Sheffield Academic Press. 1999.

Williams, M.M. II, Mortensen, D.A. and Doran, J.W. No-tillage soybean performance in cover crops for weed management in the western cornbelt. Journal of Soil and Water Conservation 55:79-84. 2000.

Williams, M.M. II, Mortensen, D.A. and Doran, J.W. Assessment of weed and crop fitness in cover crop residues for integrated weed management. Weed Science 46:595-603. 1998.

Williams, M.M. II, Jordan, J. and Yerkes, C. The fitness cost of triazine resistance in Jimsonweed (Datura stramonium L.). American Midland Naturalist 133:131-137. 1995.


     
Last Modified: 07/14/2004