Use of Quinclorac for Large Crabgrass (<i>Digitaria sanguinalis</i>) Control in Newly Summer-Seeded Creeping Bentgrass (<i>Agrostis stolonifera</i>)

Hart, Stephen E.; Lycan, Darren W.; Murphy, James A.

doi:10.1614/wt-03-106r

Cited by 17 publications

(22 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At 4 WAS, mesotrione applied at 0 and 2 WAS reduced ground cover 19 and 28% from the nontreated check, respectively. Similar reductions in creeping bentgrass density have been reported with quinclorac during establishment (Hart et al 2004). Despite significant injury from mesotrione, creeping bentgrass ground cover was similar or greater than the nontreated control from 8 to 20 WAS.…”

Section: Resultssupporting

confidence: 79%

Creeping Bentgrass, Perennial Ryegrass, and Tall Fescue Tolerance to Topramezone During Establishment

Johnston

McCullough

2016

Weed technol.

View full text Add to dashboard Cite

Topramezone controls weeds in tolerant, cool-season turfgrasses, but injury potential during establishment has received limited investigation. The objectives of this research were to evaluate the tolerance of ‘Penn A-4’ creeping bentgrass, ‘Manhattan V' perennial ryegrass, and ‘Titan' tall fescue to topramezone at 18.5, 37, or 74 g ae ha−1during establishment. Grasses were seeded in strips in October, and treatments were applied at 0, 2, 4, or 6 wk after seeding (WAS). Perennial ryegrass and tall fescue had minimal (≤ 8%) injury from all treatments, and ground cover was greater or equal to the nontreated at all application timings. Topramezone applied 4 WAS at 37 and 74 g ha−1injured creeping bentgrass 16 and 23% at 2 wk after treatment, respectively. However, all other topramezone rates and timings caused < 10% injury. Mesotrione at 175 g ai ha−1injured creeping bentgrass 14 to 43% at all timings and was more injurious than topramezone. Mesotrione applied at 2, 4, or 6 WAS controlled lesser swinecress ≥ 99% at 20 WAS, whereas applications on the day of seeding provided 71% control. All topramezone treatments provided poor control (< 70%) of lesser swinecress at 20 WAS. Overall, perennial ryegrass and tall fescue are tolerant to topramezone during establishment at the rates tested. Seedling creeping bentgrass has better tolerance to topramezone from 18.5 to 74 g ha−1, than to mesotrione at 175 g ha−1and may provide end-users an HPPD inhibitor for use during establishment.

show abstract

Section: Resultssupporting

confidence: 79%

Creeping Bentgrass, Perennial Ryegrass, and Tall Fescue Tolerance to Topramezone During Establishment

Johnston

McCullough

2016

Weed technol.

View full text Add to dashboard Cite

show abstract

“…However, siduron applied in the June seeding of 2011 as well as July seedings of both years resulted in 20 to 82% crabgrass cover, compared to ≤4% crabgrass cover in the mesotrione‐ or quinclorac‐treated plots (Table 2). Hart et al (13) showed similar results on newly‐seeded creeping bentgrass where sequential applications of quinclorac consistently provided effective weed control and turf safety.…”

Section: Effects Of Sequential Herbicide Applications On Tall Fescue mentioning

confidence: 84%

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

Sousek

Gaussoin

Patton

et al. 2014

Applied Turfgrass Science

View full text Add to dashboard Cite

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.

show abstract

“…Quinclorac is a quinolinecarboxylic acid herbicide that causes cyanide accumulation in susceptible grasses, leading to phytotoxicity, root and shoot growth inhibition, and eventual necrosis (Ferrell et al, 2003;Grossman, 1998;Koo et al, 1994;Senseman, 2007). Quinclorac has been shown to provide effective POST control of smooth crabgrass in various cool-and warm-season turfgrasses (Chism and Bingham, 1991;Dernoeden et al, 2003;Enache and Ilnicki, 1991;Hart et al, 2004;Johnson, 1994aJohnson, , 1994bJohnson, , 1995Johnson, , 1996Reicher et al, 1999); however, turfgrass injury after treatment with quinclorac has been reported to vary considerably. For example, Johnson (1997) reported as high as 65% centipedegrass [Eremochloa ophiuroides (Munro) Hack] injury after treatment with quinclorac at 0.84 kgÁha -1 .…”

mentioning

confidence: 99%

Efficacy of Two Dithiopyr Formulations for Control of Smooth Crabgrass [Digitaria ischaemum (Schreb) Schreb. ex Muhl.] at Various Stages of Growth

Brosnan¹,

Breeden²,

McCullough³

2010

horts

View full text Add to dashboard Cite

Although dithiopyr has been used for smooth crabgrass [Digitaria ischaemum (Schreb) Schreb. ex Muhl.] control for many years, data describing the efficacy of a new, water-based formulation of dithiopyr for smooth crabgrass control are limited. Research was conducted in Knoxville, TN, and Griffin, GA, evaluating water-based and wettable powder dithiopyr formulations at 0.56 and 0.43 kg·ha−1 for smooth crabgrass control when applied at the pre-emergence (PRE), one- to two-leaf (1LF), one- to two-tiller (1TL), and greater than three-tiller (3TL) stages of growth. These treatments were compared with quinclorac (0.84 kg·ha−1) applied at the same POST timings (i.e., 1LF, 1TL, and 3TL). When applied PRE, all dithiopyr treatments provided greater than 85% smooth crabgrass control at the end of the trial in both locations. At the 1LF stage, both rates and formulations of dithiopyr provided greater than 93% smooth crabgrass control at 4 weeks after application and greater than 77% at the end of the trial. Applied at the 1TL stage in Tennessee, no differences in smooth crabgrass control were detected between quinclorac and any dithiopyr treatment at the end of the trial; when applied in Georgia at the 1TL stage, quinclorac provided greater smooth crabgrass control at the end of the trial than either rate or formulation of dithiopyr. Although no differences were detected between any dithiopyr treatment and quinclorac applied at the 3TL stage in Tennessee, smooth crabgrass control at the end of the trial measured less than 70% for all treatments. At the end of the trial in Georgia, smooth crabgrass control with quinclorac (91%) was greater than both formulations of dithiopyr. These findings suggest that both the wettable powder and water-based formulations of dithiopyr can be used to effectively control smooth crabgrass at the PRE and 1LF stages of growth, but quinclorac should be selected over dithiopyr for control of tillering smooth crabgrass plants. Turfgrass managers should implement smooth crabgrass control measures at PRE and 1LF timings, because erratic responses can be observed with both dithiopyr and quinclorac applications to smooth crabgrass after tillering. Chemical names used: dithiopyr (S,S-dimethyl 2-(difluoromethyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-3,5-pyridinedicarbothioate); quinclorac (3,7-dichloro-8-quinolinecarboxylic acid).

show abstract

Use of Quinclorac for Large Crabgrass (Digitaria sanguinalis) Control in Newly Summer-Seeded Creeping Bentgrass (Agrostis stolonifera)

Cited by 17 publications

References 7 publications

Creeping Bentgrass, Perennial Ryegrass, and Tall Fescue Tolerance to Topramezone During Establishment

Creeping Bentgrass, Perennial Ryegrass, and Tall Fescue Tolerance to Topramezone During Establishment

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

Efficacy of Two Dithiopyr Formulations for Control of Smooth Crabgrass [Digitaria ischaemum (Schreb) Schreb. ex Muhl.] at Various Stages of Growth

Contact Info

Product

Resources

About