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Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri) Morphology, Growth, and Seed Production in Georgia

  • Theodore M. Webster (a1) and Timothy L. Grey (a2)
Abstract

Herbicide-resistant Palmer amaranth has become the most economically detrimental weed of cotton in the southeast United States. With the continual marginalization of potential herbicide tools, research has expanded to include alternative means of affecting future Palmer amaranth populations by altering safe sites and reducing inputs to the seedbank population. The influence of delayed Palmer amaranth establishment on seed production potential has not been investigated in the southeast United States. Studies were conducted to evaluate the influence of time of Palmer amaranth establishment on morphology, growth, and seed production. The experiment was a factorial, with five levels of Palmer amaranth transplanting (0 to 12 wk after cotton planting) and two levels of crop type (cotton and noncrop). In the absence of crop competition, the first cohort of Palmer amaranth produced 446,000 seeds per plant. This potential seed production was reduced 50% when Palmer amaranth plants were established nearly 6 wk later. In contrast, the first Palmer amaranth cohort growing in competition with cotton produced 312,000 seeds, 30% less than was produced in the absence of competition. Interference from cotton shifted time to 50% seed production to nearly 4 wk earlier in the growing season, relative to plants without crop competition. Delayed establishment of Palmer amaranth simulates premature loss of herbicide efficacy and alters the competitive balance between cotton and Palmer amaranth. Although the planting time that resulted in 50% reduction in Palmer amaranth plant height at the end of the season was not affected by the presence of cotton, 50% reduction in plant width and biomass occurred within the first 3.8 wk of the growing season when growing with cotton, more than 4 wk earlier than Palmer amaranth growing without a crop. This suggests that early season weed control programs will have a large effect on Palmer amaranth potential growth and seed production, as well as crop yield. To implement soil seedbank reduction strategies effectively, information on mechanisms that regulate Palmer amaranth persistence in the soil seedbank is needed.

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Corresponding author
Corresponding author's E-mail: ted.webster@ars.usda.gov
References
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Askew, SD, Wilcut, JW (2001) Tropic croton interference in cotton. Weed Sci. 49:184189
Askew, SD, Wilcut, JW (2002) Ladysthumb interference and seed production in cotton. Weed Sci. 50:326332
Bagavathiannan, MV, Norsworthy, JK (2013) Postdispersal loss of important arable weed seeds in the midsouthern United States. Weed Sci. 61:570579
Bensch, CN, Horak, MJ, Peterson, D (2003) Interference of redroot pigweed (Amaranthus retroflexus), Palmer amaranth (A. palmeri), and common waterhemp (A. rudis) in soybean. Weed Sci. 51:3743
Bryson, CT, DeFelice, MS, eds (2009) Weeds of the South. Athens University of Georgia Press. 468 p
Buhler, DD (1996) Development of alternative weed management strategies. J. Prod. Agric. 9:501505
Cardina, J, Webster, TM, Herms, CP, Regnier, EE (1999) Development of weed IPM: levels of integration for weed management. Pp 239267 in Buhler, DD, ed. Expanding the Context of Weed Management. New York Haworth Press
Culpepper, AS, Grey, TL, Vencill, WK, Kichler, JM, Webster, TM, Brown, SM, York, AC, Davis, JW, Hanna, WW (2006) Glyphosate-resistant Palmer amaranth (Amaranthus palmeri) confirmed in Georgia. Weed Sci. 54:620626
Culpepper, AS, Kichler, JM, York, AC (2013a) University of Georgia Herbicide Programs for Controlling Palmer Amaranth in 2013 Cotton. Athens: University of Georgia Collge of Agricultural and Environmental Sciences Circ. 924. http://gaweed.com/HomepageFiles/2013Palmerhandout-finalFeb12.pdf. Accessed October 17, 2013
Culpepper, AS, Webster, TM, Sosnoskie, LM (2013b) Rolling High Rye for Conservation Tillage Cotton Success. Athens: University of Georgia Cooperative Extension Service. https://www.youtube.com/watch?v=F0VTHsRO_0Q. Accessed December 12, 2014
Culpepper, AS, Whitaker, JR, MacRae, AW, York, AC (2008) Distribution of glyphosate-resistant Palmer amaranth (Amaranthus palmeri) in Georgia and North Carolina during 2005 and 2006. J Cotton Sci. 12:306310
Elmore, CD (1989) Weed survey—southern states, broadleaf crop subsection. Proc South Weed Sci Soc 42:416418
Fast, BJ, Murdock, SW, Farris, RL, Willis, JB, Murray, DS (2009) Critical timing of Palmer amaranth (Amaranthus palmeri) removal in second-generation glyphosate-resistant cotton. J Cotton Sci. 13:3236
Gallandt, ER (2006) How can we target the weed seedbank? Weed Sci. 54:588596
Glantz, SA, Slinker, BK (2001) Primer of Applied Regression and Analysis of Variance. 2nd edn. New York McGraw-Hill Medical Pub Division. Pp 2528
Harper, J (1956) The evolution of weeds in relation to resistance to herbicides. Proc 3rd Br Weed Control Conf 1:179188
Harrison, SK (1990) Interference and seed production by common lambsquarters (Chenopodium album) in soybeans (Glycine max). Weed Sci. 38:113118
Hartzler, RG, Bruce, B, Nordby, D (2004) Effect of common waterhemp (Amaranthus rudis) emergence date on growth and fecundity in soybean. Weed Sci. 52:242245
Horak, MJ, Loughin, TM (2000) Growth analysis of four Amaranthus species. Weed Sci. 48:347355
Jasieniuk, M, Maxwell, BD, Anderson, RL, Evans, JO, Lyon, DJ, Miller, SD, Morishita, DW, Ogg, AG Jr., Seefeldt, S, Stahlman, PW, Northam, FE, Westra, P, Kebede, Z, Wicks, GA (1999) Site-to-site and year-to-year variation in Triticum aestivumAegilops cylindrica interference relationships. Weed Sci. 47:529537
Jha, P, Norsworthy, JK (2009) Soybean canopy and tillage effects on emergence of Palmer amaranth (Amaranthus palmeri) from a natural seed bank. Weed Sci. 57:644651
Jha, P, Norsworthy, JK (2012) Influence of late-season herbicide applications on control, fecundity, and progeny fitness of glyphosate-resistant Palmer amaranth (Amaranthus palmeri) biotypes from Arkansas. Weed Technol 26:807812
Jha, P, Norsworthy, JK, Bridges, W, Riley, MB (2008) Influence of glyphosate timing and row width on Palmer amaranth (Amaranthus palmeri) and pusley (Richardia spp.) demographics in glyphosate-resistant soybean. Weed Sci. 56:408415
Keeley, PE, Carter, CH, Thullen, RJ (1987) Influence of planting date on growth of Palmer amaranth (Amaranthus palmeri). Weed Sci. 35:199204
MacRae, AW, Webster, TM, Sosnoskie, LM, Kichler, JM, Culpepper, AS (2013) Cotton yield loss potential in response to length of Palmer amaranth (Amaranthus palmeri) interference. J Cotton Sci. 17:227232
Massinga, RA, Currie, RS, Horak, MJ, Boyer, J (2001) Interference of Palmer amaranth in corn. Weed Sci. 49:202208
Meyers, SL, Jennings, KM, Schultheis, JR, Monks, DW (2010) Interference of Palmer amaranth (Amaranthus palmeri) in sweetpotato. Weed Sci. 58:199203
Mohseni-Moghadam, M, Schroeder, J, Ashigh, J (2013) Mechanism of resistance and inheritance in glyphosate resistant Palmer amaranth (Amaranthus palmeri) populations from New Mexico, USA. Weed Sci. 61:517525
Mortensen, DA, Bastiaans, L, Sattin, M (2000) The role of ecology in the development of weed management systems: an outlook. Weed Res 40:4962
Motulsky, H, Christopoulos, A (2003) Fitting models to biological data using linear and nonlinear regression: a practical guide to curve fitting. San Diego GraphPad Software Inc., www.graphpad.com. 351 p
Nandula, VK, Reddy, KN, Koger, CH, Poston, DH, Rimando, AM, Duke, SO, Bond, JA, Ribeiro, DN (2012) Multiple resistance to glyphosate and pyrithiobac in Palmer amaranth (Amaranthus palmeri) from Mississippi and response to flumiclorac. Weed Sci. 60:179188
Neve, P, Norsworthy, JK, Smith, KL, Zelaya, IA (2011) Modelling evolution and management of glyphosate resistance in Amaranthus palmeri . Weed Res 51:99112
Nichols, RL, Bond, J, Culpepper, AS, Dodds, D, Nandula, V, Main, CL, Marshall, MW, Mueller, TC, Norsworthy, JK, Price, A, Patterson, M, Scott, RC, Smith, KL, Steckel, LE, Stephenson, D, Wright, D, York, AC (2009) Glyphosate-resistant Palmer amaranth (Amaranthus palmeri) spreads in the southern United States (U.S.). Resistant Pest Manage Newsl 18:810
Norris, RF (2000) My view. Weed Sci. 48:273273
Norris, RF (2007) Weed fecundity: current status and future needs. Crop Prot 26:182188
Norsworthy, JK, Griffith, GM, Scott, RC, Smith, KL, Oliver, LR (2008) Confirmation and control of glyphosate-resistant Palmer amaranth (Amaranthus palmeri) in Arkansas. Weed Technol 22:108113
Ritz, C, Pipper, CB, Streibig, JC (2013) Analysis of germination data from agricultural experiments. Eur J Agron 45:16
SAS Institute Inc (2006) Base SAS 9.1.3 Procedures Guide, Second Edition, Volumes 1, 2, 3, and 4. Cary, NC SAS Institute Inc. 1906 p
Schutte, BJ, Liu, JY, Davis, AS, Harrison, SK, Regnier, EE (2010) Environmental factors that influence the association of an earthworm (Lumbricus terrestris L.) and an annual weed (Ambrosia trifida L.) in no-till agricultural fields across the eastern US Corn Belt. Agric Ecosyst Environ. 138:197205
Seaman, RE, Marino, PC (2003) Influence of mound building and selective seed predation by the red imported fire ant (Solenopsis invicta) on an old-field plant assemblage. J Torrey Bot Soc 130:193201
Sellers, BA, Smeda, RJ, Johnson, WG, Kendig, JA, Ellersieck, MR (2003) Comparative growth of six Amaranthus species in Missouri. Weed Sci. 51:329333
Sosnoskie, LM, Webster, T., Culpepper, AS (2013) Glyphosate resistance does not affect Palmer amaranth (Amaranthus palmeri) seedbank longevity. Weed Sci. 61:283288
Sosnoskie, LM, Webster, TM, Grey, TL, Culpepper, AS (2014) Severed stems of Amaranthus palmeri are capable of regrowth and seed production in Gossypium hirsutum . Ann Appl Biol. 165:147154
Steckel, LE, Main, CL, Ellis, AT, Mueller, TC (2008) Palmer amaranth (Amaranthus palmeri) in Tennessee has low level glyphosate resistance. Weed Technol 22:119123
Steckel, LE, Sprague, CL (2004) Late-season common waterhemp (Amaranthus rudis) interference in narrow- and wide-row soybean. Weed Technol 18:947952
Timper, P, Davis, RF, Webster, TM, Brenneman, TB, Meyer, SLF, Zasada, IA, Cai, G, Rice, CP (2011) Response of root-knot nematodes and Palmer amaranth to tillage and rye green manure. Agron J. 103:813821
Uscanga-Mortera, E, Clay, SA, Forcella, E, Gunsolus, J (2007) Common waterhemp growth and fecundity as influenced by emergence date and competing crop. Agron J. 99:12651270
Vander Wall, SB, Kuhn, KM, Beck, MJ (2005) Seed removal, seed predation, and secondary dispersal. Ecology. 86:801806
Vencill, WK, Grey, TL, Culpepper, AS, Gaines, C, Westra, R (2008) Herbicide-resistance in the Amaranthaceae . J Plant Dis Prot (Special Issue 21):4144
Ward, SM, Webster, TM, Steckel, LE (2013) Palmer amaranth (Amaranthus palmeri): a review. Weed Technol 27:1227
Webster, TM, Coble, HD (1997) Changes in the weed species composition of the southern United States: 1974 to 1995. Weed Technol 11:308317
Webster, TM, Nichols, RL (2012) Changes in the prevalence of weed species in the major agronomic crops of the southern United States: 1994/1995 to 2008/2009. Weed Sci. 60:145157
Webster, TM, Scully, BT, Grey, TL, Culpepper, AS (2013) Winter cover crops influence Amaranthus palmeri establishment. Crop Prot 52:130135
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