Dr. Wersal's Selected Publications

PEER REVIEWED PUBLICATIONS

Turnage, G., J.D. Madsen, R.M. Wersal, J.D. Byrd, B. Alcott, and T. Guetter. 2020. Selective control of flowering rush in mesocosms and field sites. Journal of Aquatic Plant Management 58:92-97.

Turnage, G., R.M. Wersal, and J.D. Madsen. 2020. Torpedograss control via submersed applications of systemic and contact herbicides in mesocosms. Journal of Aquatic Plant Management 58: 67-71.

Turnage, G., J.D. Byrd, R.M. Wersal, and J.D. Madsen. 2019. Sequential applications of diquat to control flowering rush (Butomus umbellatus L.) in mesocosms. Journal of Aquatic Plant Management 57:56-61.

Turnage, G., J.D. Madsen, R.M. Wersal, and J.D. Byrd. 2019. Simulated mechanical control of flowering rush (Butomus umbellatus) under mesocosm conditions. Invasive Plant Science and Management 12:120-123.

R.M. Wersal and J.D. Madsen. 2018. Designing and using phenological studies to define management strategies for aquatic plants. In Compendum: Journal of Aquatic Plant Management Research Methods. Journal of Aquatic Plant Management 56s:83-89. Invited Paper.

Madsen, J.D. and R.M. Wersal. 2018. Proper survey methods for research of aquatic plant ecology and management. In Compendum: Journal of Aquatic Plant Management Research Methods. Journal of Aquatic Plant Management 56s:90-96. Invited paper.

Turnage, G., J.D. Madsen, and R.M. Wersal. 2018. Phenology of curlyleaf pondweed (Potamogeton crispus L.) in the southeastern US: a two-year mesocosm study. Journal of Aquatic Plant Management 56:35-38.

Turnage, G., R.M. Wersal, and J.D. Madsen. 2017. Evaluating the efficacy of granular copper and triclopyr alone and in combination for control of flowering rush. Journal of Aquatic Plant Management 55:120-122.

Madsen, J.D., T.E. Woolf, and R.M. Wersal. 2017. Flowering rush control on drawn-down sediment: Mesocosm and field evaluations. Journal of Aquatic Plant Management 55:42-45.

Madsen, J.D. and R.M. Wersal. 2017. A review of aquatic plant monitoring and assessment methods. Journal of Aquatic Plant Management 55:1-12.

Madsen, J.D., R.M. Wersal, and M.D. Marko. 2016. Distribution and biomass allocation in relation to depth of flowering rush (Butomus umbellatus) in the Detroit Lakes, Minnesota. Invasive Plant Science and Management 9:161-170.

Robles, W., J.D. Madsen, and R.M. Wersal. 2015. Estimating the biomass of water hyacinth [Eichhornia crassipes (Mart.) Solms] using the normalized difference vegetation index. Invasive Plant Science and Management 8:203-211.

Madsen, J.D., R.M. Wersal, and T.E. Woolf. 2015. Operational control of Eurasian watermilfoil and impacts to the native submersed aquatic macrophyte community in Lake Pend Oreille, Idaho. Invasive Plant Science and Management 8:219-232.

Madsen, J.D., R.M. Wersal, and W. Robles. 2015. Evaluation of six herbicides for control of swamp smartweed (Periscaria hydropiperoides (Michx.) Small. Journal of Aquatic Plant Management 53:224-227.

Turnage, G., J.D. Madsen, and R.M. Wersal. 2015. Comparative efficacy of chelated copper formulations alone and in combination with diquat against hydrilla and subsequent sensitivity of American lotus. Journal of Aquatic Plant Management 53:138-140.

Sartain, B.T., R.M. Wersal, and J.D. Madsen. 2015. Evaluation of six herbicides for the control of water primrose (Ludwigia peploides (Kunth) P.H. Raven spp. glabrescens). Journal of Aquatic Plant Management. Journal of Aquatic Plant Management 53:134-137.

Fleming, J.P., E.D. Dibble, J.D. Madsen, and R.M. Wersal. 2015. Investigation of Darwin’s naturalization hypothesis in invaded macrophyte communities. Biological Invasions 17:1519-1531.

R.M. Wersal, A.G. Poovey, J.D. Madsen, K.D. Getsinger, and C.R. Mudge. 2014. Comparison of late-season herbicide treatments for control of flowering rush in mesocosms. Journal of Aquatic Plant Management 52:85-89.

Cox, M.C., R.M. Wersal, and J.D. Madsen. 2014. Assessing the aquatic plant community composition within the littoral zone of the Ross Barnett Reservoir, MS, USA: A six-year evaluation. Invasive Plant Science and Management 7:375-383.

Cox, M.C., R.M. Wersal, and J.D. Madsen. 2014. Evaluations of foliar applied herbicides for alligatorweed (Alternanthera philoxeroides) control. Journal of Aquatic Plant Management 52:27-30.

R.M. Wersal, J.D. Madsen, and J.C. Cheshier. 2013. Seasonal biomass and starch allocation of Phragmites australis (Haplotype I) in Southern Alabama, USA. Invasive Plant Science and Management 6:140-146.

R.M. Wersal and J.D. Madsen. 2013. Survival of the invasive aquatic plant Myriophyllum aquaticum to seasonal drawdown events. Journal of Aquatic Plant Management. 51:22-26.

R.M. Wersal and J.D. Madsen. 2013. Influences of light intensity variations on growth characteristics of Myriophyllum aquaticum. Journal of Freshwater Ecology 28:147-164. Editor’s Choice Article.

R.M. Wersal and J.D. Madsen. 2012. Combinations of diquat and carfentrazone-ethyl for enhanced control of floating aquatic plants. Journal of Aquatic Plant Management 50:46-48.

Cheshier, J.C., J.D. Madsen, R.M. Wersal, P.D. Gerard, and M.E. Welch. 2012. Differential susceptibility of common reed haplotypes I and M to aquatic herbicides. Invasive Plant Science and Management. 5:101-105.

R.M. Wersal and J.D. Madsen. 2011. Comparative effects of water level variations on growth characteristics of Myriophyllum aquaticum. Weed Research 51:386-393.

R.M. Wersal, J.C. Cheshier, J.D. Madsen, and P.D. Gerard. 2011. Phenology, starch allocation, and environmental effects on Myriophyllum aquaticum. Aquatic Botany 95:194-199.

R.M. Wersal and J.D. Madsen. 2011. Influences of water column nutrient loading on growth characteristics of the invasive aquatic macrophyte Myriophyllum aquaticum (Vell.) Verdc. Hydrobiologia. 665:93-105.

Robles, W., J.D. Madsen, and R.M. Wersal. 2011. Herbicide efficacy assessment on waterhyacinth and aquatic plant community monitoring in Lake Columbus, Mississippi. Journal of Aquatic Plant Management 49:89-93.

Cheshier, J.C., R.M. Wersal, and J.D. Madsen. 2011. The susceptibility of duckweed (Lemna minor L.) to fluridone and penoxsulam. Journal of Aquatic Plant Management 49:50-52.

Robles, W., J.D. Madsen, and R.M. Wersal. 2010. Potential for remote sensing to detect and predict herbicide injury on waterhyacinth (Eichhornia crassipes). Invasive Plant Science and Management. 3:440-450.

Wersal, R.M. and J.D. Madsen. 2010. Comparison of subsurface and foliar herbicide applications for control of parrotfeather (Myriophyllum aquaticum). Invasive Plant Science and Management. 3:262-267.

R.M. Wersal, J.D. Madsen, T.E. Woolf, and N. Eckberg. 2010. Assessment of herbicide efficacy on Eurasian watermilfoil and impacts to the native submersed plant community in Hayden Lake, ID, USA. Journal of Aquatic Plant Management 48:5-11.

R.M. Wersal and J.D. Madsen. 2010. Combinations of penoxsulam and diquat as foliar applications for control of waterhyacinth and common salvinia: Evidence of herbicide antagonism. Journal of Aquatic Plant Management 48:21-25.

R.M. Wersal, J.D. Madsen, J.H. Massey, W. Robles, and J.C. Cheshier. 2010. Comparison of daytime and night-time applications of diquat and carfentrazone-ethyl for control of parrotfeather and Eurasian watermilfoil. Journal of Aquatic Plant Management 48:56-58.

R.M. Wersal and J.D. Madsen. 2009. Combinations of diquat and a methylated seed oil surfactant for control of common duckweed and watermeal. Journal of Aquatic Plant Management 47:59-62.

Madsen, J.D., R.M. Wersal, K.D. Getsinger, and L.S. Nelson. 2008. Sensitivity of wild rice (Zizania aquatica L.) to the aquatic herbicide triclopyr. Journal of Aquatic Plant Management 46:150-154.

Madsen, J.D. and R.M. Wersal. 2008. Growth regulation of Salvinia molesta Mitchell by pH and available water column nutrients. Journal of Freshwater Ecology 23:305-313.

Madsen, J.D., R.M. Stewart, K.D. Getsinger, R.L. Johnson, and R.M. Wersal. 2008. Aquatic plant communities in Waneta Lake and Lamoka Lake, New York. Northeastern Naturalist 15:97-110.

R.M. Wersal and J.D. Madsen. 2007. Comparison of imazapyr and imazamox for control of parrotfeather (Myriophyllum aquaticum (Vellozo) Verdecourt). Journal of Aquatic Plant Management 45:132-135.

Madsen, J.D., R.M. Wersal, and T.E. Woolf. 2007. A new core sampler for estimating biomass of submersed aquatic macrophytes. Journal of Aquatic Plant Management 45:31-34.

Gray, C.J., J.D. Madsen, R.M. Wersal, and K.D. Getsinger. 2007. Eurasian watermilfoil and parrotfeather control using carfentrazone-ethyl. Journal of Aquatic Plant Management 45:43-46.

R.M. Wersal, J.D. Madsen, B.R. McMillan, and P.D. Gerard. 2006. Environmental factors affecting the biomass and distribution of Stuckenia pectinata in the Heron Lake System, Minnesota, USA. Wetlands 26:313-321.

Madsen, J.D., R.M. Wersal, M. Tyler, and P.D. Gerard. 2006. The distribution and abundance of aquatic macrophytes in Swan Lake and Middle Lake, Minnesota. Journal of Freshwater Ecology 21:421-429.

R.M. Wersal, B.R. McMillan, and J.D. Madsen. 2005. Food habits of dabbling ducks during fall migration in a prairie pothole system, Heron Lake, Minnesota. Canadian Field Naturalist 119:546-550.

BOOK REVIEWS

R.M. Wersal 2012. Review of: Wetland Weeds: Causes, Cures and Compromises, by Nick Romanowski. CSIRO Publishing, Collingwood VIC, Australia. 2011. 140 pp. US$55.00 (paperback), Published in Wetlands 32:987-988.

BOOK CHAPTERS

R.M. Wersal and K.D. Getsinger. 2014. Chapter 3: Impact of invasive aquatic plants on waterfowl pp. 19-23. In: Biology and control of aquatic plants: A best management practices handbook. 3rd Edition (Gettys, L.A., W.T. Haller, and M. Bellaud, eds.). Aquatic Ecosystem Restoration Foundation, Marietta, GA. p. 238.

Madsen, J.D., R.J. Richardson, and R.M. Wersal. 2012. Managing Aquatic Vegetation. In J.W. Neal and D.W. Willis (Eds.), Small Impoundment Management in North America, Bethesda, MD: American Fisheries Society. 275-305.

R.M. Wersal and K.D. Getsinger. 2009. Chapter 3: Impact of invasive aquatic plants on waterfowl pp. 19-23. In: Biology and control of aquatic plants: A best management practices handbook. 2nd Edition (Gettys, L.A., W.T. Haller, and M. Bellaud, eds.). Aquatic Ecosystem Restoration Foundation, Marietta, GA. p. 210.