Use of Mefluidide for Turf Overseeding

Eggens, J. L.; Wright, C. P. M.; Carey, K.

doi:10.21273/hortsci.24.2.300

Cited by 3 publications

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“…Petrovic et al (1985) found no suppression of AB seedheads by EP. Eggens et al (1989) observed 4 wk of growth suppression in CB and improved turfgrass quality while reporting severe injury in AB. The introduction of EP in…”

Section: Introductionmentioning

confidence: 95%

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Maximizing seedhead suppression of Poa annua L. in Michigan through use of growing degree‐days to predict optimum application timing for ethephon and ethephon plus trinexapac‐ethyl

Calhoun¹,

Frank

2022

Intl Turfgrass Soc Res J

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Research was conducted from 2002 to 2006 to determine optimum application timings for the chemical seedhead suppression of annual bluegrass (AB) [Poa annua L. var. reptans (Hauskins) Timm.] by single applications of the plant growth regulators ethephon (EP) (2-chloroethylphosphonic acid) or EP plus trinexapac-ethyl (TE) [4-(cyclopropyl-alpha-hydroxymethylene)-3, 5-dioxo-cyclohexanecarboxylic acid ethyl ester]. The objectives were to evaluate AB seedhead suppression from single applications of EP and EP plus TE, and to evaluate the simple average-calculated growing degree-days (GDD) and Baskerville-Emin GDD models for their reliability to predict best application timing dates from year to year. Plots were established on a 10-to 15-yr-old AB fairway maintained at 1.5 cm and receiving 0.5 to 0.6 cm daily automatic irrigation throughout the growing season and 120 kg N ha -1 yr -1 from 2002 to 2006. The soil type is a Marlette sandy loam (fine-loamy, mixed, semiactive, mesic Oxyaquic Glossudalf). Plant growth regulators were applied at 3.74 and 0.08 kg a.i. ha -1 for EP and TE, respectively, between 24 March and 13 May. Ethephon interacted with application timing in 2002 and 2003. Ethephon plus TE interacted with application timing in 2004, but not 2005 or 2006. Ethephon and EP plus TE did not provide less than 10% seedhead cover in 2003 or 2006, respectively.For EP and EP plus TE, application timing affected seedhead control in 3 of 5 yr.Abbreviations: AB, annual bluegrass; CB, creeping bentgrass; GDD, growing degree-days; GDD -5 , growing degree days with a base temperature of -5 ˚C; EP, ethephon; PGR, plant growth regulator; TE, trinexapac-ethyl.

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Section: Introductionmentioning

confidence: 95%

“…Eggens et al. (1989) observed 4 wk of growth suppression in CB and improved turfgrass quality while reporting severe injury in AB. The introduction of EP in 1999 renewed interest in research on the chemical suppression of AB seedheads (Askew et al., 2006; Borger, 2008; Gelertner & Stowell, 2001; Kane & Miller, 2003; Kopec et al., 2004).…”

Section: Introductionmentioning

confidence: 99%

Maximizing seedhead suppression of Poa annua L. in Michigan through use of growing degree‐days to predict optimum application timing for ethephon and ethephon plus trinexapac‐ethyl

Calhoun¹,

Frank

2022

Intl Turfgrass Soc Res J

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“…With widespread use of creep ing bentgrass on golf greens and fairways, the ability to control or eliminate annual bluegrass in bentgrass swards has become increasingly important. Cultural practices, particularly mowing practices (Latham, 1985;Pierce et al, 1987) and application of growth regulators (Turgeon, 1974;Eggens et al, 1988), may be useful in this regard. Nitrogen source may also affect the competitive bal ance between annual bluegrass and creeping bentgrass.…”

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confidence: 99%

Nitrate and Ammonium Nitrogen Effects on Growth of Creeping Bentgrass and Annual Bluegrass

Eggens

Wright

Carey

1989

horts

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Five cultivars of creeping bentgrass (Agrostis palustris Huds. ‘Emerald’, ‘Penncross’, ‘Penneagle’, ‘Prominent’, and ‘Seaside’) and annual bluegrass (Poa annua L.), a weed, were grown in pot culture in silica sand and supplied with nutrient solutions in which 0%, 25%, 50%, 75%, or 100% of the N (210 mg·liter−1) was and the remainder was . Growth rate, as measured by new leaves and tillers, and final size, as measured by leaf width, leaf number, tiller number, and cover, were significantly different among species and cultivars and among N ratios. All species/cultivars produced their best growth with some mixture of and . Annual bluegrass grew better in high- conditions, while the bentgrass cultivars grew as well or better in high conditions. There were significant differences among the bentgrass cultivars in their sensitivity to N source, with ‘Penncross’ being the most sensitive and ‘Seaside’ the least.

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Conversion of Fairway‐Height Perennial Ryegrass Turf to Kentucky Bluegrass without Nonselective Herbicides

Kraft

Keeley

2004

Agronomy Journal

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Many golf course superintendents wish to convert perennial ryegrass (Lolium perenne L.) fairways to other cool‐season species such as Kentucky bluegrass (Poa pratensis L.) because of the former's high fungicide requirement. However, interseeding into a mature turfgrass stand often results in poor seedling survival because of competition from the existing stand. The objective of this research was to evaluate methods for enhancing Kentucky bluegrass (KB) establishment when interseeded into a mature perennial ryegrass fairway turf. Core aeration, scalping, plant growth regulators (PGRs), postseeding low mowing (PSLM), high seeding rates, and multiple seedings were used singly and in factorial combinations. Postseeding low mowing (0.6 cm twice weekly for 4 wk) and high seeding rates [196 kg pure live seed (PLS) ha−1] were most effective in enhancing KB establishment. Plots receiving PSLM averaged 31.9% KB 21 months after seeding (MAS) compared with 18.1% in non‐PSLM plots. Seeding KB at 196 kg PLS ha−1, both fall and spring, resulted in an average of 29.8% KB 21 MAS while seeding at 98 kg PLS ha−1, in the fall only, resulted in only 19.7% KB. A single preseeding core aeration or scalping treatment did not increase KB establishment, nor did preseeding applications of the PGR trinexapac‐ethyl [4‐(cyclopropyl‐α‐hydroxy‐methylene)‐3,5‐dioxo‐cyclohexane‐carboxylic acid ethyl ester]. Mefluidide {–[2,4‐dimethyl‐5‐[[(trifluoromethyl)‐sulfonyl]amino]phenyl] acetamide} increased KB establishment at 6 MAS, but the effect was gone by 21 MAS. Where nonselective herbicides are not used, fastest conversion to KB will occur with a combination of PSLM and high seeding rates.

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Use of Mefluidide for Turf Overseeding

Cited by 3 publications

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Maximizing seedhead suppression of Poa annua L. in Michigan through use of growing degree‐days to predict optimum application timing for ethephon and ethephon plus trinexapac‐ethyl

Maximizing seedhead suppression of Poa annua L. in Michigan through use of growing degree‐days to predict optimum application timing for ethephon and ethephon plus trinexapac‐ethyl

Nitrate and Ammonium Nitrogen Effects on Growth of Creeping Bentgrass and Annual Bluegrass

Conversion of Fairway‐Height Perennial Ryegrass Turf to Kentucky Bluegrass without Nonselective Herbicides

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