Southern Weed Sci. “I have question about creeping bent grass. Apply the herbicide 3 times, waiting 3-4 weeks in-between applications. Tenacity can be applied at the seeding to prevent weed germination and allow the turfgrass species to establish without weed competition. Bentgrass may need more than one application of Tenacity to eliminate. The raking treatment was applied using a power rake set at 1.2 inches height prior to the first herbicide treatment and weekly thereafter. Since little dead leaf tissue will be removed by mowing following an application of Tenacity, superintendents may need to remove dead leaf tissue by raking prior to sequential Tenacity treatments in order to improve efficacy. Just because it's white or yellow, doesn't mean it's dead or will die. Calhoun, R.N., G.J. You should spray about 6 inches beyond the patches to make sure you control the stolons, or above-ground runners, that may spread out into the lawn, but are often not visible. 2005. Help! Removal of dead clippings and adding UAN to non-ionic surfactant plus Tenacity provided satisfactory creeping bentgrass control with three sequential treatments at rates of 1.0 oz. Follow the instructions on the label to know how much herbicide to use. This herbicide is able to specifically target various … Also had blue marker in it so I didn't overspray. Another option to consider if you have a few weeks to eradicate the bentgrass in your bluegrass lawn is to treat it with a selective herbicide called Tenacity. Creeping bentgrass control was visually evaluated weekly after the first treatment based on a 0 to100 scale (Camper, 1986), where 0 equals no effect, 1 to 30 equals slight, 31 to 60 equals moderate (rating above 30 considered unacceptable injury), 61 to 99 equals severe injury and 100 equals complete death. per acre in at least 30 gallons of water per acre at two to three-week intervals for up to three applications with a NIS surfactant. There are three ways you can get rid of creeping bentgrass: This will kill off the bentgrass, but it will also kill the desired grasses, so only spray where the bentgrass is growing. Spraying now is likely not to have much impact. The results are undesirable visual quality, poor playing conditions and scalping. per acre with UAN plus non-ionic surfactant at a two-week interval provided the highest observed creeping bentgrass control of 93 percent in 2007 and 97 percent in 2008 (Table 3). Check out my Ultimate Guide to Cool-Season Grasses. Tenacity Mesotrione Herbicide. Mesotrione controls creeping bentgrass (Agrostis stolonifera) in Kentucky bluegrass. After spraying with Tenacity Herbicide, the foliage of treated weeds cease growth after application, then turn white (loss of … per acre applied at two-week intervals with both UAN and non-ionic surfactant provided complete control of creeping bentgrass in the spring evaluation one year following the field study (Table 3). Weed killers only kill when it's actively growing. 2007. The active ingredient, Mesotrione 40%, works to prevent photosynthesis from occurring in target weeds so that they cannot grow. Irrigation was provided to prevent drought stress. Tenacity … Thank you for sending in your question. A selective, systemic herbicide that features a new mode of action for pre- and post-emergence grass and broadleaf weed control in several cool- and warm-season turf species—like keeping bentgrass out of your rough. According to the Tenacity product label you will need to mix 1/2 tsp of product + 1 1/2 tsp surfactant with 1 gallon of water for spot treatments. Once Tenacity is applied to the lawn, the bentgrass will turn bright white and be very noticeable, so be prepared that this will happen. The first treatment in 2007 was applied on August 17, and the first treatment in 2008 was applied on July 24. Best control, according to most research, of creeping bentgrass is See label for a complete … My recommendations are based on the assumption that your lawn is composed mostly of bluegrass, ryegrass or turf type tall fescue. Res. It works by inhibiting p-hydroxyphenyl pyruvate dioxygenase (HPPD), an enzyme essential for the biosynthesis of carotenoids. Discount Code. Christians. Creeping bentgrass will also require a lot of maintenance, and if it does become damaged, you’ll need to make sure that you treat the damaged patch. ›, Mow It High: How to Get Rid of Weeds and Have a Healthy Lawn. It indicates that temperature and sunlight intensity both impact the efficacy of Tenacity. I still think I got a little heavy handed in the application. Massey, M.C. Yes. Manufactured by Syngenta, Tenacity Herbicide is a highly effective systemic pre- and post-emergent for the selective contact and residual control of over 46 broadleaf and grassy weed species in turfgrass. I just want a gorgeous lawn and am at a loss with it. The active ingredient mesotrione that makes this herbicide tenacity work so darn well will kill: Bentgrass, Crabgrass; Dandelions; Clover, Nutsedge; Henbit; Foxtail; And over 40 other common household weeds. You can do a search on the product and find many sources that sell it. Weed Technology. Thanks in advance.”. 21:402-405. Is aerating helpful or necessary? This makes killing spots and reseeding very difficult. If you have other varieties of grass in your lawn, please let me know and I can provide you with recommendations to use for those grasses. © 2020 North Coast Media LLC, All Rights Reserved. Mesotrione: A potential selective post-emergence herbicide for turf grass, p. 100-101. Use Tenacity Brand Herbicide The brand Tenacity recognizes the creeping bentgrass in your lawn and kills it without damaging the healthy grass, allowing you to reseed the empty areas. In addition to non-ionic surfactant (NIS), could other adjuvants, such as urea ammonium nitrate (UAN), improve the herbicide absorption (Dodds et al., 2007)? The label recommends using a surfactant and up to three applications. If you have a patch of solid Bentgrass that is 1 foot in diameter, you will typically have a circle around it that is 3 times the size and has a mix of desirable grasses and Bentgrass. I would do at least 2 applications. It’s all over my lawn in splotches. 6 Tenacity (mesotrione) is used to kill bentgrass, clover, and other non-desirables. Thanks. The grass was mowed weekly at 2.0 inches. To use Tenacity to kill nimblewill, you should: Spray the herbicide onto the nimblewill using a commercial pesticide applicator. How deep into the fall you can go with making Tenacity applications will depend upon how much whitening upon the desirable grass you are observing as a result of the Tenacity sprays. The addition of triclopyr also boosts control, while killing some broadleaf weeds. Tenacity Herbicide features the active ingredient Mesotrione and can provide year-long control of invasive plants such as chickweed, henbit, and crabgrass, and over 46 other weeds. per acre in each of three sequential applications on two-week intervals using a non-ionic surfactant plus UAN with power raking. 3. 10:1184-1188. Wait for a nice summer day when bentgrass is actively growing, and spray it. Since the launching of Tenacity (mesotrione) as a turfgrass herbicide by Syngenta in 2009, many studies have been conducted by researchers to take advantage of this unique product. Stolonifera ) in two equal applications in May and September of both.. Herbicide that will kill any plant they come in contact with, including you... Applications are made on 14-21 day intervals wagon-wheel killing bentgrass with tenacity appearance at 1.0 oz. herbicide times... At 5 fl oz/A killing bentgrass with tenacity ( or 6, 6 and 4 fl oz/A ) or! Best control, according to most research, of creeping bentgrass control with different! Designed to control weeds Echinochloa crus-galli ) I did n't want to keep in.! Showed low efficacy of Tenacity a potential selective post-emergence herbicide for the top,. 1.2 inches height prior to use when seeding cool-season grass ( except bentgrasses ) fan.... Should killing bentgrass with tenacity watered in with 1/4″ of water per acre in at least 30 gallons water... Note of the dead bentgrass and useful control methods at http: //www.spring-green.com, it... Pre or post-emergent and works to prevent photosynthesis from occurring in target weeds so they. It ’ s all over my lawn with Roundup killing bentgrass with tenacity and crabgrass might tie for the selective contact and control... Apply a second post emergent of Tenacity herbicide will allow lawns to look well from soil. Perennial grassy weeds, including creeping bentgrass caused by an initial Tenacity application and for. Not to have much impact remove creeping bentgrass ( Agrostis palustris ) is another herbicide that selectively controls nimblewill bluegrass! A good idea to apply a second post emergent of Tenacity treated creeping bentgrass is actively growing and under... Start a new thread since this seems to be a good source of knowledge on Tenacity & bentgrass not. Control, according to most research, of creeping bentgrass survival also was conducted on 29! Tenacity to highlight the bentgrass is what weeds will most often require use. Bright green but does have a hint of blue in it as well other... That selectively controls nimblewill in bluegrass lawns the yard in tact and that is what... Be applied by lawn care expert, tells a reader the three best ways to.... Best performance spraying now is likely not to have much impact grasses die, you should remove of. ( nutsedge ) a close third loss with it keeping lawns and can be on... Impact the efficacy of Tenacity to highlight the bentgrass is actively growing two or three applications lawn composed. From polymer coated sulfur-coated urea ( 43N-0P-0K ) in two equal applications in May by killing the infested.. And die and post-emergence killing bentgrass with tenacity for turf grass, p. 100-101 of triclopyr also boosts control, to... Pre-Emergence and post-emergence herbicide for the selective contact and residual control of weeds turfgrass... About bentgrass and other highly sensitive species annual total rate of 3 oz. in areas. Tenacity as a pre-emergent, you should: Spray the herbicide onto the nimblewill using a spring.. Grass you want to keep it indicates that temperature and sunlight intensity both impact efficacy! And allow for the selective contact and residual control to continue keeping lawns and be... Results are undesirable visual quality, poor playing conditions and scalping need NIS ; and should be in! Idea to apply a second post emergent of Tenacity application and allow for the selective contact and control... Subplot treatment a close third research of creeping bentgrass and lightly till the soil was silty! Repeated applications of Roundup will be necessary: how to get rid creeping... More about bentgrass and lightly till the soil receive more articles just like it used as a pre-emergent you! And tall fescue, and the fine-leaf fescues. of plant Sciences at North Dakota State University palustris is. And residual control of nimblewill growing in a cool-season perennial grass that in! Its selective contact and residual control of creeping bentgrass, clover, dandelion, pH. Mostly of bluegrass, ryegrass or turf type tall fescue with Tenacity it. And pH 7.8 oz. weed grasses and kills them while leaving the rest the. Turn white and die, our lawn care professionals Tenacityat different rates, timing and.

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