‘Riviera’ Bermudagrass Response to Pre-seeding Applications of Sulfonylurea Herbicides

Willis, John B.; Ricker, Daniel; Askew, Shawn D.

doi:10.1094/ats-2008-0916-01-rs

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…Williams and Burrus (29) suggested that the most effective means of converting perennial ryegrass to seeded bermudagrass was to seed after applying either glyphosate or pronamide, which significantly reduced competition from the perennial ryegrass. Willis et al (31) found that applying sulfonylurea herbicides before seeding bermudagrass had minimal effects on the establishment of seeded bermudagrass. Although that study suggests that chemical transition and seeding could be accomplished simultaneously, this has not been tested as a viable means of establishing seeded bermudagrass during the dormant period.…”

Section: Background and Rationale For The Studymentioning

confidence: 99%

Seeded Bermudagrass Establishment in an Overseeded Perennial Ryegrass Stand as Affected by Transition Herbicide and Seeding Date

Jellicorse

Richardson

McCalla

et al. 2012

Applied Turfgrass Science

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It has been demonstrated that improved cultivars of seeded common bermudagrass (Cynodon dactylon L. Pers.) can be dormant‐seeded during the winter, providing an alternative approach to renovate damaged areas of turf. However, bermudagrass golf courses and athletic fields are often overseeded with a cool‐season grass such as perennial ryegrass (Lolium perenne L.) during the dormancy period and the overseeded grass may prevent or delay establishment of dormant‐seeded bermudagrass. The objective of this study was to determine if dormant seeding into an overseeded turf could be an effective means of bermudagrass establishment. ‘Riviera’ bermudagrass was seeded into a simulated overseeded turf on three different dates, including March (dormant seeding), April (spring seeding), and June (summer seeding) in 2008 and 2010 at Fayetteville, AR. In addition, five herbicides, including glyphosate, flazasulfuron, foramsulfuron, trifloxysulfuron, pronamide, and an untreated control, were applied to each of those seeding date treatments to alter the competition from the perennial ryegrass. Bermudagrass establishment was enhanced by herbicide application, but less affected by seeding date. Glyphosate applied before seeding provided the highest bermudagrass coverage compared to the other herbicide treatments and sulfonylurea herbicides were also effective at suppressing ryegrass competition compared to pronamide and untreated plots. Establishment of seeded bermudagrass into an overseeded stand of perennial ryegrass turf was improved with herbicide use, regardless of the seeding date. However, there was no advantage to dormant seeding bermudagrass into an overseeded turf.

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Section: Background and Rationale For The Studymentioning

confidence: 99%

Seeded Bermudagrass Establishment in an Overseeded Perennial Ryegrass Stand as Affected by Transition Herbicide and Seeding Date

Jellicorse

Richardson

McCalla

et al. 2012

Applied Turfgrass Science

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“…Researchers noted that trifloxysulfuron applied one week before seeding injured bermudagrass greater than 30% and reduced establish-ment (Willis et al, 2007). Foramsulfuron, metsulfuron, and sulfosulfuron were reported safe to apply one or three weeks after seeding but rimsulfuron caused significant bermudagrass injury (Willis et al, 2008). In Arkansas, injury to bermudagrass seedlings was reported from MSMA applications with flazasulfuron, foramsulfuron, metribuzin, or trifloxysulfuron, but injury was temporary and generally did not reduce overall bermudagrass establishment after 30 days (Richardson et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

Bermudagrass Reseeding Intervals for Rimsulfuron, Simazine, and Sulfosulfuron

McCullough¹,

Nutt²

2010

horts

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Turf managers may wish to reseed common bermudagrass [Cynodon dactylon (L.) Pers.] following weed control with rimsulfuron, simazine, or sulfosulfuron applications, but establishment may be affected by herbicide residual activity. Field experiments were conducted in Georgia to investigate bermudagrass reseeding intervals for these herbicides. Application timing before seeding reduced bermudagrass establishment more than herbicide rate. By four weeks after seeding, bermudagrass cover was 15%, 53%, 81%, and 90% of the untreated from herbicides applied zero, two, four, or six weeks before seeding, respectively. Simazine at 2.24 kg a.i./ha reduced bermudagrass cover more frequently than sulfosulfuron at 0.035 and 0.07 kg a.i./ha and rimsulfuron at 0.02 kg a.i./ha. Results suggest that common bermudagrass may be safely reseeded four to six weeks after rimsulfuron, simazine, or sulfosulfuron treatments, but applications made closer to the seeding date have the potential to significantly delay establishment.

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“…ex Muhl.) [27], annual bluegrass (Poa annua L.), and perennial ryegrass [11,15]. Furthermore, Brecke et al [25] reported that flazasulfuron 0.05 kg a.i.…”

Section: Weed Controlmentioning

confidence: 99%

Weed Control Efficacy and Citrus Response to Flazasulfuron Applied Alone or in Combination with Other Herbicides

Singh¹,

Ramirez²,

Jhala³

et al. 2012

AJPS

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Field experiments were conducted to evaluate the phytotoxicity of flazasulfuron on citrus species and efficacy on weeds when applied alone or in combination with other herbicides. Grapefruit was the most sensitive and tangerine was the least sensitive to flazasulfuron. Injury to grapefruit was 70% with the application of flazasulfuron at 0.20 kg a.i. ha -1 at 60 DAT and was reduced (5%) when flazasulfuron at 0.05 kg a.i. ha -1 was tank mixed with glyphosate at 0.84 kg a.i. ha -1 . Flazasulfuron alone at all rates did not control grass weeds and common ragweed. Florida/Brazil pusley was moderately controlled with high rates of flazasulfuron from 30 to 45 DAT; however, control did not exceed 75%. There was good control of Spanishneedles (78% -85%) and horseweed (73% -81%) with flazasulfuron at all rates at 30 DAT but control declined later in the season. Tank mix of flazasulfuron with glyphosate improved flazasulfuron efficacy on grass and broadleaf weeds. Flazasulfuron at 0.07 kg a.i. ha -1 plus glyphosate at 1.70 kg a.i. ha -1 was more effective in controlling grass weeds (83%) at 60 DAT and provided the highest control (79%) of Florida/Brazil pusley at 45 DAT. There was excellent control (75% to 94%) of Spanishneedles and adequate control of eastern black nightshade and common ragweed with flazasulfuron tank mixed with glyphosate or diuron. This study showed that flazasulfuron alone does not adequately control grasses and some broadleaf weeds in citrus and tank mixing it with glyphosate or diuron improved flazasulfuron's efficacy. However, injury to grapefruit was observed at rates which effectively controlled weeds. Further studies are needed to determine the most suitable flazasulfuron rate that could be used to manage weeds in grapefruit.

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‘Riviera’ Bermudagrass Response to Pre-seeding Applications of Sulfonylurea Herbicides

Cited by 4 publications

References 12 publications

Seeded Bermudagrass Establishment in an Overseeded Perennial Ryegrass Stand as Affected by Transition Herbicide and Seeding Date

Seeded Bermudagrass Establishment in an Overseeded Perennial Ryegrass Stand as Affected by Transition Herbicide and Seeding Date

Bermudagrass Reseeding Intervals for Rimsulfuron, Simazine, and Sulfosulfuron

Weed Control Efficacy and Citrus Response to Flazasulfuron Applied Alone or in Combination with Other Herbicides

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