Breeden, Gregory K.

Brosnan, James T.

Samples, Thomas J.

English

University of Tennessee, Knoxville: Trace

University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Commercial Horticulture UT Extension Publications 9-29-2011 W269 Weed Control in Centipedegrass Gregory K. Breeden James T. Brosnan Thomas J. Samples Follow this and additional works at: https://trace.tennessee.edu/utk_agexcomhort  Part of the Agricultural Science Commons Recommended Citation "W269 Weed Control in Centipedegrass," Gregory K. Breeden, James T. Brosnan, and Thomas J. Samples, Version 3.0 , https://trace.tennessee.edu/utk_agexcomhort/37 The publications in this collection represent the historical publishing record of the UT Agricultural Experiment Station and do not necessarily reflect current scientific knowledge or recommendations. Current information about UT Ag Research can be found at the UT Ag Research website. This Turf is brought to you for free and open access by the UT Extension Publications at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Commercial Horticulture by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact trace@utk.edu. W269Weed Control in Centipedegrass (Eremochloa ophiuroides)Gregory K. Breeden, Assistant Specialist – Turfgrass Weed ScienceJames T. Brosnan, Ph.D., Assistant Professor – Turfgrass Weed ScienceThomas J. Samples, Ph.D., Professor – Turfgrass SciencePlant SciencesIntroductionCentipedegrass (Eremochloa ophiuroides) is a perennial warm-season turfgrass used on parks, golf  course roughs, cemeteries, roadsides and lawns throughout the southeastern United States. Compared to several other warm-season species, centipedegrass requires less nitrogen fertility and maintenance due to its relatively slow rate of growth. New cultivars (e.g., TifBlair) with improved cold tolerance have been developed for use in the Turfgrass Transition Zone. For more information on centipedegrass varieties acclimated to Tennessee, see UT Extension publication W159-C, Turfgrass Selection: Centipedegrass. Despite these advantages, controlling weeds in centipedegrass can be challenging, in that this species is intolerant of many herbicides commonly used for broadleaf and grassy weed control in turfs.Centipedegrass Life Cycle and Growth  in TennesseeCentipedegrass green-up begins in late spring with maximum growth occurring during the summer months. Leaves turn yellow then brown as plants enter winter dormancy. The species exhibits slow vertical growth and does not perform well at mowing heights less than 1 inch. Centipedegrass tolerates drought and has limited shade tolerance.Centipedegrass IdentificationCentipedegrass leaves end in a boat-shaped tip and plants have a membranous ligule with fine hairs (Figure 1). Centipedegrass, like St. Augustinegrass (Stenotaphrum secundatum), has aboveground runners or stolons. However, leaves of centipedegrass are arranged alternately along stolons, while those on St. Augustinegrass are arranged on opposite sides of the stolon (Figure 2).Figure 1. Boat-shaped tip of centipedegrass.Figure 2. Centipedegrass stolon.Weed Control Options in CentipedegrassCentipedegrass is intolerant of many herbicides used for broadleaf and grassy weed control in other turfs. Table 1 contains a list of herbicides labeled for use on established centipedegrass turf. If  applied according to label instructions, the potential for injuring centipedegrass with most of these herbicides is very low. However, some herbicides are labeled for use on centipedegrass at certain application rates only. The injury potential of these herbicides is considered medium to high. Always be sure to apply any herbicide at labeled rates with calibrated equipment to reduce the chance of undesirable turfgrass injury. Final ThoughtsCentipedegrass is commonly used on parks, golf  course roughs, cemeteries, roadsides and lawns in the Turfgrass Transition Zone. When managed properly centipedegrass forms a dense turf that competes well against weed infestation. However, should a herbicide application be needed for weed control, be sure to select a product labeled for use on centipedegrass, as many other herbicides can cause undesirable turfgrass injury.This publication contains herbicide recommendations that are subject to change at any time. The recommendations in this publication are provided only as a guide. It is always the herbicide applicator’s responsibility, by law, to read and follow all current label directions for the specific herbicide being used. The label always takes precedence over the recommendations found in this publication. Always refer to the product label for specific information on proper product use, tank-mix compatibility and turfgrass tolerance. For more information on turfgrass weed control, visit the University of Tennessee’s turfgrass weed science website,  http://tennesseeturfgrassweeds.org.1.	 Preemergence	Herbicides	 	 	 	2.	 benefin	(Balan)	 2.5G	 1.5-3	lb	 Low	3.	 benefin	+	oryzalin	(XL	2G)	 2G	 2-3	lb	 Low	4.	 benefin	+	trifluralin	(Team	2G)	 2G	 1.5-3	lb	 Low	5.	 bensulide	(Bensumec)	 4FL	 7.6-12.4	lb	 Low	6.	 dimethenamid-P	(Tower)	 6EC	 0.98-1.5	lb	 Low	7.	 dithiopyr	(Dimension,	Dimension	Ultra)	 1EC,	40WP,	2EW,	others	 0.38-0.5	lb	 Low	8.	 indaziflam	(Specticle)	 20	WSP	 0.0313-0.0625	lb	 Medium	9.	 isoxaben	(Gallery)	 75DF	 0.5-1	lb	 Low	10.	 metolachlor	(Pennant	Magnum)	 	 1.24-2.48	lb	 Low	11.	 oryzalin	(Surflan)	 4AS	 1.5-2	lb	 Low	12.	 oxadiazon	+	prodiamine	(Regalstar	II)	 1.2G	 2.4	lb	 Medium	13.	 pendimethalin	(Pendulum	Aquacap,	others)	 3.8L,	others	 1.5-3	lb	 Low	14.	 prodiamine	(Barricade,	others)	 65WG,	4FL,	others	 0.38-1	lb	 Low	15.	 prodiamine	+	sulfentrazone	(Echelon)	 4SC	 0.57-0.75	lb	 Low	16.	 simazine	(Princep)	 4L,	90DF	 1-2	lb	 Low	17.	 	 	 	 	Table 1.1.	 Active	Ingredient	(Trade	Name	Ex.)	 Formulations	 Rate	ai/a	 Injury	Potential	to			 	 	 	 Established	Grass*	18.	 Postemergence	Herbicides	 	 	 	19.	 2,4-D	amine	 4L	 0.75-1	lb	 Medium	20.	 2,4-D	+	MCPP	or	MCPA	+	dicamba	(Three-way,	Trimec,	others)	 Various	 Various	 High	21.	 2,4-D	+	triclopyr	+	fluroxypyr	(Momentum	fx2)	 2.8L	 1	lb	 High		22.	 atrazine	(Aatrex,	Atrazine)	 4L,	90DF	 1-2	lb	 Low	23.	 bentazon	(Basagran	T/O,	Lescogran)	 4L	 1	lb	 Low	24.	 carfentrazone	(Quicksilver	T&O)	 1.9EC	 0.016-0.031	lb	 Low	25.	 carfetrazone	+	2,4-D	+	MCPP	+	dicamba	(Speedzone	Southern)	 0.81L	 0.55-1.39	lb			 Medium	26.	 carfentrazone	+	quinclorac	(SquareOne)	 70WDG	 0.53-0.79	lb	 Medium	27.	 chlorsulfuron	(Corsair,	Telar)	 75WDG	 0.75-4	oz	 Medium	28.	 clopyralid	+	triclopyr	(Confront)	 3L	 0.375-0.75	lb	 Medium	29.	 dicamba	(Banvel,	Vanquish,	others)	 4L	 0.25-0.5	lb	 Medium	30.	 flazasulfuron	(Katana)	 25WG	 0.0078-0.047	lb	 Low	31.	 halosulfuron	(SedgeHammer)	 75DF	 0.031-0.062	lb	 Low	32.	 imazaquin	(Image)	 70DG	 0.37-0.5	lb	 Medium	33.	 mesotrione	(Tenacity)	 4FL	 0.156-0.25	lb		 Low	34.	 metsulfuron	(Manor,	Blade)	 60DF	 0.15-0.3	oz	 High	35.	 metsulfuron	+	sulfentrazone	(Blindside)	 66WDG	 0.269-0.413	lb	 Medium-High	36.	 quinclorac	+	sulfentrazone	(Solitare)	 75WDG	 0.75-1.5	lb	 Medium-High	37.	 rimsulfuron	(Tranxit	GTA)	 25DF	 0.125-0.5	oz	 Medium	38.	 sethoxydim	(Segment)	 1EC	 0.28	lb.	 Medium	39.	 sulfentrazone	(Dismiss)	 4L	 0.125-0.375	lb	 Medium	40.	 sulfentrazone	+	imazethapyr	(Dismiss	South)	 4L	 0.29-0.45	lb	 High	41.	 sulfosulfuron	(Certainty)	 75WDG	 5.3-43	g	 Medium	42.	 thiencarbazone	+	iodosulfuron	+	dicamba	(Celsius)	 68WDG	 0.106-0.208	lb	 Medium	43.	 	 	 	 	W269   10/11   11-0180 Programs in agriculture and natural resources, 4-H youth development, family and consumer sciences, and resource development.University of Tennessee Institute of Agriculture, U.S. Department of Agriculture and county governments cooperating.UT Extension provides equal opportunities in programs and employment.1.	 Active	Ingredient	(Trade	Name	Ex.)	 						Formulations	 Rate	ai/a	 Injury	Potential	to			 	 	 	 Established	Grass*	Table 1. (continued)1.	 *Low	designates	the	herbicides	that	are	least	likely	to	cause	injury;	Medium	designates	herbicides	that	centipedegrass	is	less	tolerant	of	these	products;			 	High	designates	herbicdes	that	will	cause	some	level	of	injury

W269 Weed Control in Centipedegrass

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W269 Weed Control in Centipedegrass

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