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Biochemical Effects of Imazapic on Bermudagrass Growth Regulation, Broomsedge (Andropogon virginicus) Control, and MSMA Antagonism

  • Patrick E. McCullough (a1), Jialin Yu (a1), Donn G. Shilling (a1), Mark A. Czarnota (a2) and Christopher R. Johnston (a1)...

Abstract

Broomsedge populations have increased substantially over the last decade on roadsides in Georgia. The invasiveness of this species might have resulted from imazapic use for bermudagrass growth regulation and the limited use of MSMA on roadsides. The objectives of this research were to evaluate (1) differential growth inhibition of bermudagrass and broomsedge to imazapic, (2) susceptibility of isolated acetolactate synthase (ALS) enzymes of bermudagrass and broomsedge to imazapic, (3) broomsedge control with tank mixtures of imazapic with MSMA, and (4) the influence of imazapic on absorption and translocation of 14C-MSMA. In greenhouse experiments, imazapic reduced bermudagrass shoot biomass ~ 2 times more from the nontreated than broomsedge. Isolated ALS enzymes of bermudagrass were ~ 100 times more susceptible to inhibition by imazapic than broomsedge. In field experiments, imazapic provided no control of broomsedge, but MSMA alone controlled broomsedge 81% at 12 mo after initial treatments (MAIT). Broomsedge control was reduced to 45% when MSMA was tank mixed with imazapic at 12 MAIT. In laboratory experiments, imazapic tank mixtures did not reduce broomsedge absorption or translocation of 14C-MSMA. Overall, bermudagrass is more susceptible to imazapic due to greater target-site inhibition than broomsedge. Results emphasize the importance of MSMA use for broomsedge control, but agronomists should avoid tank mixtures with imazapic to reduce potential antagonism.

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Corresponding author

Corresponding author's E-mail: pmccull@uga.edu

References

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Anderson, DD, Nissen, SJ, Martin, AR, Roeth, FW (1998) Mechanism of primisulfuron resistance in a shattercane (Sorghum biolor) biotype. Weed Sci. 46:158162.
Anonymous (2008) Plateau herbicide label. Wilmington, DE E. I. du Pont de Nemours and Co.7 p
Anonymous (2010) Target 6 Plus label. Memphis, TN Luxembourg-Pamol, Inc. 6 p
Beran, DD, Masters, RA, Gaussoin, RE, Rivas-Pantoja, F (2000) Establishment of big bluestem and Illinois bundleflower mixtures with imazapic and imazethapyr. Agron J. 92:460465
Brecke, BJ (1981) Smutgrass (Sporobolus poiretii) control in bahiagrass (Paspalum notatum) pastures. Weed Sci. 29:553555
Burke, IC, Clewis, SC, Wilcut, JW (2001) Annual grass control with Select and Cadre. Page 169 in Proceedings of the Southern Weed Science Society. Lawrence, KS Weed Science Society of America. Vol. 54 [Abstract]
Burke, IC, Wilcut, JW (2003) Physiological basis of antagonism of clethodim by imazapic on goosegrass (Eleusine indica (L.) Gaertn.). Pestic Biochem Physiol. 76:3745
Butler, TJ, Muir, JP (2006) Coastal bermudagrass (Cynodon dactylon) yield response to various herbicides. Weed Technol. 20:95100
Butler, WJ, Stritzke, JF, Redmon, LA, Goad, CL (2002) Broomsedge (Andropogon virginicus) response to herbicides and burning. Weed Technol. 16:1822
Carey, JB, Penner, D, Kells, JJ (1997) Nicosulfuron and primisulfuron selectivity in five species. Weed Sci. 45:2230
Cross, RB, McCarty, LB, Tharayil, N, Whitwell, T, Bridges, WC (2013) Detecting annual bluegrass (Poa annua) resistance to ALS-inhibiting herbicides using a rapid diagnostic assay. Weed Sci. 61:384389
Golley, FB (1965) Structure and function of an old-field broomsedge community. Ecol Monogr. 35:113137
Grichar, WJ, Baumann, PA, Baughman, TA, Nerada, JD (2008) Weed control and bermudagrass tolerance to imazapic plus 2,4-D. Weed Technol. 22:97100
Hart, SE, Saunders, JW, Penner, D (1992) Chlorsulfuron-resistant sugarbeet: cross-resistance and physiological basis of resistance. Weed Sci. 40:378383
Johnson, BJ (1989) Growth regulation of common bermudagrass (Cynodon dactylon) with imazaquin and AC 263,222. Weed Technol. 7:746750
Johnson, BJ (1990) Response of bermudagrass (Cynodon spp.) cultivars to multiple plant growth regulator treatments. Weed Technol. 4:549554
Johnson, BJ (1994a) Influence of plant growth regulators and mowing on two bermudagrasses. Agron J. 86:805810
Johnson, BJ (1994b) Frequency of mowing and plant growth regulators to suppress common bermudagrass. J Turf Manag. 1:6771
Masters, RA, Nissen, SJ, Gaussoin, RE, Beran, DD, Stougaard, RT (1996) Imidazolinone herbicides improve restoration of Great Plains grasslands. Weed Technol. 10:392403
Mittelhauser, JR, Barnes, PW, Barnes, TG (2011) The effect of herbicide on the re-establishment of native grasses in the Blackland Prairie. Nat Areas J. 31:226233
Peters, EJ, Lowance, SA (1974) Fertility and management treatments to control broomsedge in pastures. Weed Sci. 22:201205
Rice, EL (1972) Allelopathic effects of Andropogon virginicus and its persistence in old fields. Am J Bot. 59:752755
Shinn, SL, Thill, DL (2004) Tolerance of several perennial grasses to imazapic. Weed Technol. 18:6065
[U.S. EPA] U.S. Environmental Protection Agency (2013) Pesticide Reregistration: Organic Arsenicals. http://www.epa.gov/pesticides/reregistration/organic_arsenicals_fs.html. Accessed November 2, 2014
Westerfeld, WW (1945) A colorimetric determination of blood acetoin. J Biol Chem. 161:495502.
Wise, AM, Grey, TL, Prostko, EP, Vencill, WK, Webster, TM (2009) Establishing the geographical distribution and level of acetolactate synthase resistance of Palmer amaranth (Amaranthus palmeri) accessions in Georgia. Weed Technol. 23:214220

Keywords

Biochemical Effects of Imazapic on Bermudagrass Growth Regulation, Broomsedge (Andropogon virginicus) Control, and MSMA Antagonism

  • Patrick E. McCullough (a1), Jialin Yu (a1), Donn G. Shilling (a1), Mark A. Czarnota (a2) and Christopher R. Johnston (a1)...

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