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Control of Johnsongrass in the Absence of Glyphosate in Midsouth Cotton Production Systems

  • Christopher J. Meyer (a1), Jason K. Norsworthy (a1), Daniel O. Stephenson (a2), Mohammad T. Bararpour (a1), Randall L. Landry (a2) and Brandi C. Woolam (a2)...


Johnsongrass populations that are resistant to 5-enolpyruvyl-3-shikimate synthase (EPSPS)–, acetyl coenzyme A carboxylase (ACCase)–, or acetolactate synthase (ALS)–inhibiting herbicides are increasingly common throughout the midsouth. Three trials were conducted in 2012, 2013, and 2014 in Fayetteville, AR and Alexandria, LA to evaluate strategies with and without ALS- and ACCase inhibitors for management of rhizomatous johnsongrass in the absence of glyphosate. Fluometuron or fluometuron plus pyrithiobac applied PRE followed by (fb) EPOST, MPOST, and LAYBY tank mixtures containing multiple effective mechanisms of action (MOA) controlled johnsongrass at least 90%. Simplifying the program by removing a herbicide or eliminating an application timing reduced control, and increased vegetative and sexual reproduction of johnsongrass. To manage severe infestations or escapes glufosinate plus clethodim fb glufosinate plus clethodim or clethodim plus pyrithiobac fb clethodim) effectively controlled 15-cm johnsongrass. However, johnsongrass control was reduced when ALS and ACCase inhibitors were tank mixed, especially for the second POST application, compared to ACCase inhibitors alone. Effective herbicide programs are available to growers to control johnsongrass in the absence of glyphosate, but the use of PRE herbicides followed by multiple applications of POST herbicides is critical for successful management.

Las poblaciones de Sorghum halepense que son resistentes a herbicidas inhibidores de 5-enolpyruvyl-3-shikimate synthase (EPSPS), acetyl coenzyme A carboxylase (ACCase), o acetolactate synthase (ALS) están aumentando a lo largo del sur medio de los Estados Unidos. Se realizaron tres ensayos en 2012, 2013, y 2014 en Fayetteville, Arkansas y en Alexandria, Louisiana, para evaluar estrategias con y sin inhibidores de ALS y ACCase para el manejo de S. halepense con rizomas en ausencia de glyphosate. Fluometuron o fluometuron más pyrithiobac aplicados PRE seguidos de (fb) aplicaciones EPOST, MPOST, y a la base del cultivo antes del cierre del dosel (LAYBY) con mezclas en tanque conteniendo múltiples mecanismos de acción (MOA) controlaron S. halepense al menos 90%. El simplificar el programa removiendo un herbicida o eliminando un momento de aplicación redujo el control e incrementó la reproducción vegetativa y sexual de S. halepense. Para manejar infestaciones severas o escapes, glufosinate más clethodim fb glufosinate más clethodim o clethodim más pyrithiobac fb clethodim controlaron efectivamente S. halepense de 15 cm de altura. Sin embargo, el control de S. halepense se redujo cuando los inhibidores ALS y ACCase fueron mezclados en tanque, especialmente en la segunda aplicación POST, al compararse con inhibidores de ACCase solos. Los productores cuentas con programas efectivos de herbicidas para el control de S. halepense en ausencia de glyphosate, pero el uso de herbicidas PRE seguido de múltiples aplicaciones de herbicidas POST es crítico para un manejo exitoso.


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Bagavathiannan, MV, Norsworthy, JK (2014) Do roadside herbicide applications select for resistance in johnsongrass populations? Proc South Weed Sci Soc 67:105
Barnes, JW, Oliver, LR (2004) Cloransulam antagonizes annual grass control with aryloxyphenoxypropionate graminicides but not cyclohexanediones. Weed Technol 18:763772
Blackshaw, RE, Harker, KN, Clayton, GW, O'Donovan, JT (2006) Broadleaf herbicide effects on clethodim and quizalofop-P efficacy on volunteer wheat (Triticum aestivum). Weed Technol 20:221226
Bourgeois, L, Kenkel, NC, Morrison, IN (1997) Characterization of cross-resistance patterns in acetyl-CoA carboxylase inhibitor resistant wild oat (Avena fatua). Weed Sci 45:750755
Bridges, DC, Chandler, JM (1987) Influence of johnsongrass (Sorghum halepense) density and period of competition on cotton yield. Weed Sci 35:6367
Burke, IC, Clewis, SB, Wilcut, JW (2001) Annual grass control with Select and Cadre. Proc South Weed Sci Soc 54:169
Burke, IC, Wilcut, JW (2003) Physiological basis for antagonism of clethodim by imazapic on goosegrass (Eleusine indica (L.) Gaertn.). Pestic Biochem Physiol 76:3745
Burke, IC, Wilcut, JW, Cranmer, J (2006) Cross-resistance of a johnsongrass (Sorghum halepense) biotype to aryloxyphenoxypropionate and cyclohexanedione herbicides. Weed Technol 20:571575
Damalas, CA, Eleftherohorinos, IG (2001) Dicamba and atrazine antagonism on sulfonylurea herbicides used for johnsongrass (Sorghum halepense) control in corn (Zea mays). Weed Technol 15:6267
Ferreira, KL, Burton, JD, Coble, HB (1995) Physiological basis for antagonism of fluazifop-P by DPX-PE350. Weed Sci 43:184191
Franz, JE, Mao, MK, Sikorski, JA (1997). Glyphosate: a unique global herbicide. 1st edn. Washington, DC: American Chemical Society. Pp 315
Heap, I (2015) International Survey of Herbicide Resistant Weeds. Accessed March 2, 2015
Holshouser, DL, Coble, HD (1990) Compatibility of sethoxydim with five postemergence broadleaf herbicides. Weed Technol 4:128133
Hudetz, M, Foery, W, Wells, J, Soares, JE (2000) Trifloxysulfuron, a new low rate Novartis post-emergent herbicide for cotton and sugarcane. Proc South Weed Sci Soc 53:163166
Johnson, DB, Norsworthy, JK (2014) Johnsongrass (Sorghum halepense) management as influenced by herbicide selection and application timing. Weed Technol 28:142150
Johnson, DB, Norsworthy, JK, Scot, RC (2014a) Distribution of herbicide-resistant johnsongrass (Sorghum halepense) in Arkansas. Weed Technol 28:111121
Johnson, DB, Norsworthy, JK, Scot, RC (2014b). Herbicide programs for controlling glyphosate-resistant johnsongrass (Sorghum halepense) in glufosinate-resistant soybean. Weed Technol 28:1018
Johnson, WG, Li, J, Wait, JD (2003) Johnsongrass control, total nonstructural carbohydrates in rhizomes, and regrowth after application of herbicides used in herbicide-resistant corn (Zea mays). Weed Technol 17:3641
Keeley, PE, Thullen, RJ (1989) Growth and interaction of johnsongrass (Sorghum halepense) with cotton (Gossypium hirsutum). Weed Sci 37:339344
McWhorter, CG (1989) History, biology, and control of johnsongrass. Rev Weed Sci 4:85121
Myers, PF, Coble, HD (1992) Antagonism of graminicide activity on annual grass species by imazethapyr. Weed Technol 6:333338
Norsworthy, JK, Ward, SM, Shaw, DR, Llewellyn, RS, Nichols, RL, Webster, TM, Bradley, KW, Frisvold, G, Powles, SB, Burgos, NR, Witt, WW, Barrett, M (2012) Reducing the risks of herbicide resistance: best management practices and recommendations. Weed Sci 60(SI 1):3162
Riar, DS, Norsworthy, JK, Johnson, DB, Scott, RC, Bagavathiannan, M (2011) Glyphosate resistance in a johnsongrass (Sorghum halepense) biotype from Arkansas. Weed Sci 59:299304
Smeda, RJ, Snipes, CE, Barrentine, WL (1997) Identification of graminicide-resistant johnsongrass (Sorghum halepense). Weed Sci 45:132137
VanGessel, MJ (2001) Glyphosate-resistant horseweed from Delaware. Weed Sci 49:703705
Vidrine, PR, Reynolds, DB, Blouin, DC (1995) Grass control in soybean (Glycine max) with graminicides applied alone and in mixtures. Weed Technol 9:6872
Webster, TM (2013) Southern Weed Science Society Weed Survey. Pages 275287 in Proceedings of the Southern Weed Science Society Annual Meeting. Houston, TX: Southern Weed Science Society



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