Tall Fescue Seedling Tolerance to Carfentrazone, Bromoxynil, Quinclorac, and Siduron

McElroy, J. Scott; Breeden, Gregory K.

doi:10.21273/hortsci.41.1.252

Cited by 6 publications

(5 citation statements)

References 15 publications

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“…However, sethoxydim at both a low and high application rate resulted in ≥30% injury at 28 DAA in both years and significantly reduced overall tall fescue quality, and therefore sethoxydim is not recommended for use in turf areas containing tall fes-cue. Tall fescue tolerance to topramezone and quinclorac was similar to that in previous research on tall fescue seedlings or during establishment (Johnston et al, 2016;McElroy & Breeden, 2006;Willis et al, 2006). In addition, the low tolerance of tall fescue to sethoxydim was similar to previous research with sethoxydim (Brewster & Spinney, 1989;Peters et al, 1989).…”

Section: Turf-type Tall Fescuesupporting

confidence: 88%

Herbicide tolerance in 11 grass species for minimal‐to‐no‐mow golf course rough

Patton

Braun

Bearss

et al. 2021

Agrosystems Geosci & Env

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Research was conducted to determine the tolerance of 11 grass species used in minimal-to-no-mow turf areas to three postemergence herbicides applied at one-and twofold the maximum label rates in 2018 and 2019. Grasses were transplanted into field plots in West Lafayette, IN, in 2018 and 2019, allowed time to establish (∼1−2 mo), and then either treated with one application of quinclorac, sethoxydim, and topramezone at two rates or not treated. All 11 grass species had acceptable tolerance (≤20% injury) to quinclorac applied at 0.845 kg acid equivalent (a.e.) ha -1 . Quinclorac at 1.69 kg a.e. ha -1 produced moderate injury (≥21% injury) on only little bluestem [Schizachyrium scoparium (Michx.) Nash.], prairie dropseed [Sporobolus heterolepis (A. Gray) A. Gray], and switchgrass (Panicum virgatum L.). Strong creeping red fescue (Festuca rubra L. ssp. rubra Gaudin), which had ≤5% injury from all three herbicides, exhibited the greatest tolerance among grass species tested.With the exception of strong creeping red fescue, sethoxydim significantly injured all other grass species. Injury from topramezone varied among grass species and herbicide rates. Grasses tolerant (≤20% injury) to topramezone at both rates were big bluestem (Andropogon gerardii Vitman), broomsedge bluestem (Andropogon virginicus L.), indiangrass [Sorghastrum nutants (L.) Nash], strong creeping red fescue, and tall fescue [Festuca arundinacea Schreb.; syn. Schedonorus arundinaceus (Schreb.) Dumort., nom. cons.]. Tolerance among species was variable to quinclorac, sethoxydim, and topramezone, and thus turf managers should first identify desired grass species prior to herbicide application. INTRODUCTIONGolf course turf surrounding the putting green, tee, and fairway of each hole is called "rough" (Beard & Beard, 2005).Golf courses typically have two different rough areas: a primary rough, which is mown between 3.8 and 10.2 cm and causes moderate difficulty in golfer strokes, and a secondary Abbreviations: a.e., acid equivalent; DAA, days after application.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Turf-type Tall Fescuesupporting

confidence: 88%

Herbicide tolerance in 11 grass species for minimal‐to‐no‐mow golf course rough

Patton

Braun

Bearss

et al. 2021

Agrosystems Geosci & Env

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“…Quicksilver (carfentrazone, Group 14 [protoporphyrinogen oxidase inhibitor], FMC Specialty Solutions, Philadelphia, PA) and Tenacity (mesotrione, Group 27 [4‐hydroxyphenylpyruvate dioxygenase inhibitor], Syngenta Crop Protection, Greensboro, NC) are conventional herbicides but have been classified as “reduced risk” by the USEPA's Conventional Reduced Risk Pesticide Program (Fishel, 2013). Quicksilver is labeled for use on several cool‐season turfgrasses and has postemergence activity on many broadleaf weeds (McElroy and Breeden, 2006). Tenacity was introduced as a novel herbicide to control creeping bentgrass infestations in cool‐season turfgrass and turns affected plants a bleached white color following application (Beam et al, 2006).…”

Section: Treatment List Active Ingredients Application Rates and Application Dates For Trial 1 Conducted From The Fall Of 2015 Through Thmentioning

confidence: 99%

“…Quicksilver is labeled for use on several cool-season turfgrasses and has postemergence activity on many broadleaf weeds (McElroy and Breeden, 2006). Tenacity was introduced as a novel herbicide to control creeping bentgrass infestations in cool-season turfgrass and turns affected plants a bleached white color following application (Beam et al, 2006).…”

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confidence: 99%

Alternative and Low-Use-Rate Herbicides Offer Similar Levels of Weed Control to Current Standards in Turfgrass Lawns in the Upper Midwest

Hockemeyer

2019

Crop, Forage & Turfgrass Management

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Demand exists for effective selective herbicides that do not contain the active ingredient 2,4-D.• Multiple low-use-rate and biological-based herbicides provided effective weed control.• The 2,4-D-containing three-way Trimec 1000 consistently reduced weed populations more effectively than alternatives though alternative options exist for those customers concerned with the non-target impacts of 2,4-D. AbstractWeed control in turfgrass lawns is often reliant on herbicides containing the active ingredient 2,4-dichlorophenoxyacetic acid (2,4-D). Concerns over the widespread use of 2,4-D-based herbicides has led to the development of alternative herbicides with low use rates or classifications such as reduced risk or organic. The objective of this study was to test alternative herbicide products in the field and compare their efficacy to a standard three-way mixture containing 2,4-D, dicamba, and mecoprop. Nine different herbicides were tested for their efficacy over a 3-year period on a turfgrass lawn in Madison, WI. All treatments reduced weed cover compared with the non-treated control. The three-way standard herbicide Trimec 1000 consistently reduced weed populations most effectively. Low-userate products like Defendor and Turflon Ester Ultra and the mineral oil-based adjuvant Civitas WEEDfree all reduced weed populations to levels comparable to that of Trimec 1000. These results indicate that a small number of non-2,4-D options are available for effective weed control on cool-season turfgrasses in the upper Midwest.

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“…Mesotrione can be used for both PRE and POST control of grassy and broadleaf weeds during establishment of TF or KBG with limited impact on turf safety (5,6,10,15,19,25,26). Carfentrazone is labeled for creeping bentgrass ( Agrostis stolonifera L.), TF, KBG, or PRYE 1 WAE or more, and provides POST control of many broadleaf weeds (2,18). Aminocyclopyrachlor was labeled for applications at any time during seeding and establishment of cool‐season grasses, but was removed from the market in 2011 (3).…”

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confidence: 99%

Weed Control and Turf Safety of Single and Sequential Applications of Herbicides Over Spring Seedings

Sousek

Gaussoin

Patton

et al. 2014

Applied Turfgrass Science

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Weed control is important during establishment of cool‐season grasses, especially when seeded in spring near summer annual weed germination. Our objectives were to determine (i) turf safety and weed control from sequential applications of newly‐released herbicides on tall fescue at three seeding dates (May, June, July) and (ii) turf safety and weed control from newly‐released herbicides applied at seeding or shortly after emergence of spring‐seeded Kentucky bluegrass or tall fescue. No herbicides tested negatively affected turfgrass establishment and usually improved turf establishment by reducing weed competition. Mesotrione consistently provided effective weed control and turf cover from either single or sequential applications over different locations, years, seeding dates, and turf species. Quinclorac or siduron applied as single or sequential applications or quinclorac+carfentrazone as a single application provided effective weed control and turf cover depending on seeding date and application regime. Although spring seeding can be achieved with high maintenance, it is strongly recommended to seed cool season grasses at the optimal time from late summer to early fall.

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Tall Fescue Seedling Tolerance to Carfentrazone, Bromoxynil, Quinclorac, and Siduron

Cited by 6 publications

References 15 publications

Herbicide tolerance in 11 grass species for minimal‐to‐no‐mow golf course rough

Herbicide tolerance in 11 grass species for minimal‐to‐no‐mow golf course rough

Alternative and Low-Use-Rate Herbicides Offer Similar Levels of Weed Control to Current Standards in Turfgrass Lawns in the Upper Midwest

Weed Control and Turf Safety of Single and Sequential Applications of Herbicides Over Spring Seedings

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