2006 North Central Weed Science Society Proceedings

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Weed Biology, Ecology and Management

Fall and Spring Development of Soybean Cyst Nematode on Winter Annual Weeds. J. Earl Creech*, William G. Johnson, Purdue University, West Lafayette, IN, Jared S. Webb, Bryan G. Young, Jason P. Bond, Southern Illinois University, Carbondale, IL, and S. Kent Harrison, Ohio State University, Columbus, OH. (74)

The Relationship of Soybean Cyst Nematode and Purple Deadnettle Management in Microplots. Jared S. Webb*, Bryan G. Young, and Jason P. Bond, Southern Illinois University, Carbondale, IL. (75)

Investigation of Weed Suppression Potential of Polymer-Induced Soil Crusting. Justin D. Valletta*, Edward C. Luschei and Chris M. Boerboom, University of Wisconsin, Madison, WI. (76)

Weed Community Composition Over Eight Years of Continuous Glyphosate Use in a Corn-Soybean Annual Rotation . Mark R. Jeschke and David E. Stoltenberg*, University of Wisconsin, Madison, WI. (77)

Biomass Allocation Patterns of Field-Grown Common Lambsquarters and Giant Foxtail as Affected by Early-Season Variation in Light Quality. Greta G. Gramig and David E. Stoltenberg*, University of Wisconsin, Madison, WI. (78)

Experimental Cylinder Comparisons for Monitoring Seedling Emergence . Dean Peterson*, Kurt Spokas, Frank Forcella, and David Archer, USDA-Agricultural Research Service, Morris, MN. (79)

Glyphosate-Resistant Horseweed Population Dynamics are Influenced by Integrated Weed Management Practices in No-Till Crops. Vince M. Davis*, Greg R. Kruger, Andrew M. Westhoven, and William G. Johnson, Purdue University, West Lafayette, IN. (80)

Influence of Henbit and Purple Deadnettle Density on Plant Biomass and Soybean Cyst Nematode Reproduction. Valerie A. Mock*, J. Earl Creech, and William G. Johnson, Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN. (81)

Time of Tillage Effects on Weed Communities in No-Till Soybeans. John Cardina* and Catherine P. Herms, Ohio State University, Wooster, OH. (82)

Survey of Weeds and Weed Management in Sweet Corn Grown for Processing. Martin M. Williams II* and Adam S. Davis, USDA-ARS, University of Illinois, Urbana, IL, Thomas L. Rabaey, General Mills, LeSueur, MN, Chris M. Boerboom, University of Wisconsin, Madison, WI. (83)

Differential Effects of Photoperiod on Development of Solanaceous Weed Species. Anita Kamboj*, Douglas J Doohan and Joel Felix, OARDC/ Ohio State University, Wooster, OH. (84 )

Functional Trait Dynamics Over Successional Time: A Comparison of Native and Exotic Species. Timothy A. Rye* and Scott J. Meiners, Eastern Illinois University, Charleston, IL. (85)

Yellow Nutsedge Control In Pinot Gris Grapes With Halosulfuron. Tim Koch*, Doug Doohan, Ohio State University /OARDC, Wooster, OH. (86)

The Biology and Fecundity of Selected Common Lambsquarters Biotypes. Andrew M. Westhoven*, William G. Johnson, Mark M. Loux, and Jeff M. Stachler, Purdue University, IN and Ohio State University, OH. (87)

Susceptibility of Common Lambsquarters to Glyphosate is Influenced by Parental Exposure. Andrew R. Kniss* and Stephen D. Miller, University of Wyoming, Laramie, WY, Philip H. Westra, Colorado State University, Fort Collins, CO, and Robert G. Wilson, University of Nebraska, Scottsbluff, NE. (88)

Mathematical Simulation of Soil Microclimate Conditions for Weed Seed Germination. Kurt Spokas* and Frank Forcella, USDA-Agricultural Research Service, Morris, MN. (89)

Competition and Management of Annual Morningglory (Ipomoea spp.) in Corn and Soybean. Phillip J. Parrish*, Dawn E. Nordby, and Emerson D. Nafziger, University of Illinois, Urbana, IL. (90)

Tolerance of Various Market Classes of Dry Beans to Clomazone. N. Soltani *, C. Shropshire, and P. H. Sikkema. University of Guelph Ridgetown Campus, Ridgetown, Ontario, Canada. (91)

Grass and Broadleaf Weed Density Interaction with Herbicide Dose. Aifheli M. Ndou* and J. Anita Dille, Kansas State University, Manhattan, KS. (92)

Wild Proso Millet Demography in Snap Beans Following Three Different Sweet Corn Hybrids. Adam S. Davis* and Martin M. Williams II, USDA-ARS Invasive Weed Management Unit, Urbana, IL. (93)

Canada Thistle Phenology . Frank Forcella* and David Archer, USDA-Agricultural Research Service, Morris, MN. (158)

Response of Soybean Cyst Nematode to Annual Ryegrass, Purple Deadnettle, and Soybean Combinations. Valerie A. Mock*, J. Earl Creech, and William G. Johnson, Purdue University, West Lafayette, IN. (159)

Control of Winter Annual Weeds Affects Summer Annual Weed Growth and Management. Jared S. Webb* and Bryan G. Young, Southern Illinois University, Carbondale, IL, William G. Johnson and J. Earl Creech, Purdue University, West Lafeyette, IN. (160)

Transmission of Glyphosate Resistance in Common Ragweed. Johnathan P. Dierking* and Reid J. Smeda, University of Missouri, Columbia, MO. (161)

Management of Problematic Populations of Common Lambsquarters in Glyphosate-Resistant Soybean. Andrew M. Westhoven*, William G. Johnson, Mark M. Loux, and Jeff M. Stachler, Purdue University, West Lafayette, IN and Ohio State University, Columbus, OH. (162)

Corn Yield Loss Partitioned Among Water, Nitrogen and Palmer Amaranth Stresses. Ella K. Ruf* and J. Anita Dille, Kansas State University, Manhattan, KS. (163)

Effect of Croping Sequences (Rotations) on Weed Seedbanks. U. Mazarura*, Kutsaga Research Comapany, Harare, Zimbabwe. (164)

Emergence, Survivorship, and Seed Production Of Glyphosate-Resistant Horseweed in No-Till Systems. Vince M. Davis* and William G. Johnson, Purdue University, West Lafayette, IN. (165)

Role of Sweet Corn Canopy Architecture in Crop/Weed Interactions. Yim So*, Jerald. K. Pataky, Martin M. Williams II, and Adam Davis, University of Illinois, Urbana, IL, Invasive Weed Management Unit, USDA-ARS, Urbana, IL. (166)

Modeling Weed Emergence. Krishona Martinson*, Beverly Durgan, Jochum Wiersma, and Frank Forcella, University of Minnesota, St. Paul, MN, and USDA-ARS, Morris, MN. (167)

Response of Two Common Lambsquarters Biotypes to Glyphosate. Andrew R. Kniss*, Stephen D. Miller, University of Wyoming, Laramie, WY, Robert G. Wilson, University of Nebraska, Scottsbluff, NE, and Philip H. Westra, Colorado State University, Fort Collins, CO. (168)

Glyphosate-Resistant Horseweed Seedbank Fluctations Under Various No-Till Weed Management Systems. Greg R. Kruger*, Vince M. Davis, and William G. Johnson, Purdue University, West Lafayette, IN. (169)

Quality Versus Quantity: Spring Wheat Seed Size and Seeding Rate Effects on Wild Oat Interference and Economic Returns. Robert N. Stougaard* and Qingwu Xue, Montana State University Kalispell, MT. (170)

The Impact of Variability in Crop Plant Spacing on Potential Weed Population Growth Rates. Edward C. Luschei*, University of Wisconsin, Madison, WI. (171)

The Weed Control Value of Latteral Root Segmentation in Canada Thistle. Richard L. Crow* and Ed Luschei, University of Wisconsin, Madison, WI. (172)

Can Soil Become Biologically Suppressive to Velvetleaf? Jane Okalebo, John Lindquist*, Gary Yuen, and Rhae Drijber, University of Nebraska, Lincoln, NE. (173)

Stimulation of Germination of Eastern Black Nightshade, Smooth Groundcherry and Clammy Groundcherry Seeds with Sulfonylurea Herbicides . Robert E. Uhlig* and Bernard H. Zandstra, Michigan State University, East Lansing, MI. (174)

Management of Canada Thistle in Organic Cropping Systems Using Summer Annual Cover Crops and Mowing. Abram Bicksler and John Masiunas*, University of Illinois, Urbana, IL. (175)

Canada Thistle Seed Dispersal. Ryan P. Miller*, Roger L. Becker, Liz A.B. Stahl, University of Minnesota, St. Paul; Milton J. Haar and Lee D. Klossner, University of Minnesota, Lamberton SWROC; and Frank Forcella, USDA-ARS, Morris, MN. (176)

Recalcitrant Weeds in Ohio Vineyards. Linjian Jiang, Tim Koch, Imed Dami, and Douglas Doohan. Ohio State University. ( I1)