Postemergence Control of Annual Bluegrass (Poa annua spp. reptans) in Creeping Bentgrass (Agrostis stolonifera) Turf1

2003 ◽  
Vol 17 (4) ◽  
pp. 770-776 ◽  
Author(s):  
PAUL B. WOOSLEY ◽  
DAVID W. WILLIAMS ◽  
A. J. POWELL
Keyword(s):  
Creeping Bentgrass ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Annual Bluegrass

Absorption, Translocation, and Metabolism of Amicarbazone in Annual Bluegrass (Poa annua), Creeping Bentgrass (Agrostis stolonifera), and Tall Fescue (Festuca arundinacea)

Weed Science ◽  
2013 ◽  
Vol 61 (2) ◽  
pp. 217-221 ◽  
Author(s):  
Jialin Yu ◽  
Patrick E. McCullough ◽  
William K. Vencill
Keyword(s):  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Creeping Bentgrass ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Physiological Effects ◽  
Cool Season ◽  
Foliar Absorption ◽  
Annual Bluegrass

Amicarbazone controls annual bluegrass in cool-season turfgrasses but physiological effects that influence selectivity have received limited investigation. The objective of this research was to evaluate uptake, translocation, and metabolism of amicarbazone in these species. Annual bluegrass, creeping bentgrass, and tall fescue required < 3, 56, and 35 h to reach 50% foliar absorption, respectively. At 72 h after treatment (HAT), annual bluegrass and creeping bentgrass translocated 73 and 70% of root-absorbed14C to shoots, respectively, while tall fescue only distributed 55%. Annual bluegrass recovered ≈ 50% more root-absorbed14C in shoots than creeping bentgrass and tall fescue. Creeping bentgrass and tall fescue metabolism of amicarbazone was ≈ 2-fold greater than annual bluegrass from 1 to 7 d after treatment (DAT). Results suggest greater absorption, more distribution, and less metabolism of amicarbazone in annual bluegrass, compared to creeping bentgrass and tall fescue, could be attributed to selectivity of POST applications.

Annual Bluegrass (Poa Annua) Control in Creeping Bentgrass (Agrostis Stolonifera) Putting Greens with Bispyribac-sodium

2007 ◽  
Vol 21 (2) ◽  
pp. 426-430 ◽  
Author(s):  
Travis C. Teuton ◽  
Christopher L. Main ◽  
John C. Sorochan ◽  
J. Scott McElroy ◽  
Thomas C. Mueller
Keyword(s):  
Creeping Bentgrass ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Putting Greens ◽  
Annual Bluegrass

scholarly journals Effects of Rolling and Sand Topdressing on Dollar Spot Severity in Fairway Turfgrass

2019 ◽  
Vol 29 (4) ◽  
pp. 394-401 ◽  
Author(s):  
Thomas O. Green ◽  
John N. Rogers ◽  
James R. Crum ◽  
Joseph M. Vargas ◽  
Thomas A. Nikolai
Keyword(s):  
Cost Saving ◽  
Creeping Bentgrass ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Mixed Stand ◽  
Dollar Spot ◽  
Annual Bluegrass ◽  
Spot Activity ◽  
Effective Cost

Results suggest that sand topdressing was more consistent at reducing dollar spot (Clarireedia jacksonii) in fairway turfgrass more so than rolling. This practice could be an effective cost-saving alternative to reduce frequent fungicide applications. Research was conducted from 2011 to 2014 on a simulated golf fairway and examined dollar spot severity responses in a mixed-stand of creeping bentgrass (Agrostis stolonifera) and annual bluegrass (Poa annua ssp. reptans) to sand topdressing and rolling. Treatments consisted of biweekly sand topdressing, rolling at three frequencies (one, three, or five times weekly), a control, and three replications. Infection was visually estimated. Sand topdressing significantly (P < 0.05) reduced disease up to 50% at the peak of the dollar spot activity in 2011, 2013, and 2014. Results on the effects of rolling on dollar spot were inconsistent.

Nitrogen Influences Bispyribac-Sodium Efficacy and Metabolism in Annual Bluegrass (Poa annua) and Creeping Bentgrass (Agrostis stolonifera)

2011 ◽  
Vol 25 (3) ◽  
pp. 385-390
Author(s):  
Patrick E. McCullough ◽  
Stephen E. Hart ◽  
Thomas Gianfagna ◽  
Fabio Chaves
Keyword(s):  
Nitrogen Fertilization ◽  
Laboratory Experiments ◽  
Field Experiments ◽  
Creeping Bentgrass ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Annual Bluegrass ◽  
Increased Sensitivity ◽  
Sodium Metabolism ◽  
Nitrogen Treatments

Field and laboratory experiments were conducted in New Jersey to investigate the influence of nitrogen on annual bluegrass and creeping bentgrass metabolism and responses to bispyribac-sodium. In field experiments, withholding nitrogen during the test period increased sensitivity of both grasses to bispyribac-sodium, and grasses fertilized biweekly had darker color on most rating dates. Nitrogen generally increased annual bluegrass tolerance to bispyribac-sodium at 74 g ha−1but not at 148 g ha−1. Creeping bentgrass was influenced by nitrogen at both herbicide rates. In laboratory experiments, weekly nitrogen treatments increased14C-bispyribac-sodium metabolism in both grasses compared to unfertilized plants. Annual bluegrass metabolized approximately 50% less herbicide regardless of nitrogen regime compared to creeping bentgrass. Overall, routine nitrogen fertilization appears to improve annual bluegrass and creeping bentgrass tolerance to bispyribac-sodium, which may be attributed to higher metabolism.

Bispyribac-Sodium Application Regimes for Annual Bluegrass (Poa annua) Control on Creeping Bentgrass (Agrostis stolonifera) Putting Greens

2010 ◽  
Vol 24 (3) ◽  
pp. 332-335 ◽  
Author(s):  
Patrick E. McCullough ◽  
Stephen E. Hart
Keyword(s):  
Field Experiments ◽  
Creeping Bentgrass ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Putting Greens ◽  
Annual Bluegrass ◽  
Turf Quality

Bispyribac-sodium effectively controls annual bluegrass in creeping bentgrass fairways but efficacy on putting greens may be affected by management differences and thus, application regimes may need to be modified for effective annual bluegrass control. To test this hypothesis, field experiments investigated various bispyribac-sodium application regimens for annual bluegrass control on creeping bentgrass putting greens. Bispyribac-sodium regimes totaling 148, 222, and 296 g ha−1controlled annual bluegrass 81, 83, and 91%, respectively, over 2 yr. Pooled over herbicide rates, bispyribac-sodium applied two, three, and six times controlled annual bluegrass 78, 83, and 94%, respectively. The most effective bispyribac-sodium regime was 24.6 g ha−1applied weekly, which controlled annual bluegrass 90% after 8 wk with acceptable levels of creeping bentgrass discoloration. After 8 wk, all regimes reduced turf quality as a result of voids in turf following annual bluegrass control; regimes with six applications reduced turf quality the most.

scholarly journals First Report of Brown Ring Patch Caused by Waitea circinata var. circinata on Poa annua and Agrostis stolonifera in New Jersey

Plant Disease ◽  
2011 ◽  
Vol 95 (1) ◽  
pp. 78-78 ◽  
Author(s):  
E. N. Njambere ◽  
B. B. Clarke ◽  
S. A. Bonos ◽  
J. A. Murphy ◽  
R. Buckley ◽  
...  
Keyword(s):  
New Jersey ◽  
Creeping Bentgrass ◽  
The United States ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Its Sequencing ◽  
First Report ◽  
Annual Bluegrass ◽  
Pathogenicity Tests ◽  
Waitea Circinata

Waitea circinata var. circinata was first reported as the causal agent of brown ring patch on annual bluegrass (Poa annua L.) in the United States in 2007 (2). In early April to mid-June of 2009, circular to irregularly shaped yellow rings resembling symptoms of this disease were observed on an annual bluegrass putting green at Rutgers University in North Brunswick, NJ. Severely infected foliage eventually turned brown as the disease progressed. During the same time period, similar disease symptoms were observed on creeping bentgrass (Agrostis stolonifera L.) from a golf course in Bedminster Township, NJ. The disease reappeared in both locations in April of 2010. Five additional samples with similar symptoms on creeping bentgrass and annual bluegrass were received at Rutgers Diagnostic Laboratory from Paramus, Madison, Allamuchy, and Farmingdale, NJ between late April and early May of 2010. Portions of diseased leaf and sheath tissue that displayed symptoms of the disease were disinfested for 1 min in 0.5% NaOCl, rinsed with sterile distilled water, and plated on potato dextrose agar (PDA) amended with 50 mg/liter of streptomycin sulfate. At the first sign of fungal growth, single hyphal tips were transferred to PDA. After 1 week at 25°C, white-to-orange mycelial colonies formed in culture and eventually turned brown with age. Minute sclerotia (≤3 mm), which followed the same color development pattern, formed within 10 days. These features are consistent with those described of W. circinata var. circinata (2,3). The internal transcribed spacer (ITS) region of the ribosomal RNA gene was amplified using primer pair ITS1/ITS4 and sequenced with ITS4 (GenBank Accession Nos. HQ166065 to HQ166071). BLASTn analysis of the ITS sequences showed a 99 to 100% similarity to W. circinata var. circinata sequences deposited in GenBank (1,2). Pathogenicity tests were conducted in 2010 using 6-week-old creeping bentgrass seedlings cv. Declaration inoculated with colonized oat grain that had been autoclaved and then infested with the Bedminster Township isolate. Eight colonized oat grains were uniformly spread around the crowns of seedlings grown in 10-cm-diameter pots. Control plants were treated with autoclaved grain. Plants were incubated at 25°C and high humidity maintained by misting the plants three times per day. Within 3 days postinoculation, foliage near infested grain turned chlorotic. All foliage in pots became completely blighted and spherical orange-brown sclerotia were observed on leaf sheaths by the eighth day. W. circinata var. circinata was consistently reisolated from inoculated plants (as confirmed by isolate morphology and ITS sequencing) but not from control plants. The ITS sequence data, morphological characters of the isolates, and pathogenicity tests demonstrate that W. circinata var. circinata is present in New Jersey. To our knowledge, this is the first report of W. circinata var. circinata infecting turfgrass in New Jersey. References: (1) C. M. Chen et al. Plant Dis. 93:906, 2009. (2) K. A. de la Cerda et al. Plant Dis. 91:791, 2007. (3) T. Toda et al. Plant Dis. 89:536, 2005.

Effect of Paclobutrazol and Flurprimidol on Suppression ofPoa annuaspp.reptansin Creeping Bentgrass (Agrostis stolonifera) Greens

1995 ◽  
Vol 9 (1) ◽  
pp. 182-186 ◽  
Author(s):  
B. Jack Johnson ◽  
Tim R. Murphy
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Creeping Bentgrass ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Annual Bluegrass ◽  
Final Treatment

Plant growth regulators paclobutrazol and flurprimidol were evaluated for suppression ofPoa annuaspp.reptans, a perennial biotype of annual bluegrass, in a creeping bentgrass green. Paclobutrazol at 0.6 kg ai/ha applied on Mar. 15, followed by 0.3 kg/ha on Apr. 29, 0.6 kg/ha on Oct. 1, and 0.3 kg/ha on Nov. 12 for each of 2 yr suppressedP. annuaspp.reptans28% approximately 4 mo after the final treatment. When paclobutrazol was applied at 0.3 kg/ha in each of four applications during the same period, suppression was similar to that with the higher rate 1 and 2 mo after final treatment but declined to 7% by 4 mo. Suppression ofP. annuaspp.reptansfrom flurprimidol applied four times during each of 2 yr was 22 to 27% 1 mo after final treatment but no suppression was noted 2 mo after the final treatment. Maximum creeping bentgrass injury was less than 20% when either paclobutrazol or flurprimidol was applied in the spring. However, creeping bentgrass injury was approximately 30% in the fall when either chemical was applied in the spring and repeated in October at 0.6 kg/ha.

Temperature Influences Creeping Bentgrass (Agrostis stolonifera) and Annual Bluegrass (Poa annua) Response to Bispyribac-Sodium

2006 ◽  
Vol 20 (3) ◽  
pp. 728-732 ◽  
Author(s):  
Patrick E. McCullough ◽  
Stephen E. Hart
Keyword(s):  
New Jersey ◽  
New Brunswick ◽  
Creeping Bentgrass ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Growth Chamber ◽  
Annual Bluegrass ◽  
Temperature Regimes ◽  
Leaf Chlorosis ◽  
Research Complex

Bispyribac-sodium is a POST herbicide that selectively controls annual bluegrass in creeping bentgrass, but inconsistent results with seasonal applications are believed to occur from temperature influences on bispyribac-sodium efficacy. Growth chamber experiments at the New Jersey Experimental Greenhouse Research Complex, New Brunswick, NJ, investigated three temperature regimes on ‘L-93’ creeping bentgrass and annual bluegrass responses to bispyribac-sodium. Annual bluegrass and creeping bentgrass exhibited contrasting responses to bispyribac-sodium as temperature increased from 10 to 30 C. Regressions of 4 week after treatment (WAT) data revealed as temperature increased from 10 to 30 C, required bispyribac-sodium rates for 50% clipping reduction (CR50) of annual bluegrass decreased from 85 to 31 g ai/ha and required rates for 50% leaf chlorosis decreased from greater than 296 to 98, indicating increased herbicidal efficacy at higher temperatures. In contrast, required bispyribac-sodium rates for creeping bentgrass CR50increased from 200 to greater than 296 as temperature increased from 10 to 30 C. Bispyribac-sodium discolored creeping bentgrass 0 to 20% at 20 and 30 C and discoloration increased 10 to 50% at 10 C. Thus, warmer temperatures (20 and 30 C) increase bispyribac-sodium efficacy for annual bluegrass control with minimal bentgrass discoloration; however, cooler temperatures (10 C) have minimal efficacy on annual bluegrass and increase bentgrass chlorosis.

Selectivity of Endothall in Turf

Weed Science ◽  
1972 ◽  
Vol 20 (6) ◽  
pp. 557-561 ◽  
Author(s):  
A. J. Turgeon ◽  
Donald Penner ◽  
W. F. Meggitt
Keyword(s):  
Dicarboxylic Acid ◽  
Poa Pratensis ◽  
Creeping Bentgrass ◽  
Kentucky Bluegrass ◽  
Agrostis Stolonifera ◽  
Poa Annua ◽  
Selective Action ◽  
Annual Bluegrass ◽  
Morphological Differences

Absorption, translocation, metabolism, and action of 7-oxabicyclo[2.2.1]heptane-2,3-dicarboxylic acid (endothall) in annual bluegrass (Poa annua L.), Kentucky bluegrass (Poa pratensis L. ‘Merion’), and creeping bentgrass (Agrostis stolonifera L. ‘Penncross’) were studied. Selective action on annual bluegrass from root applications of endothall was attributed to differences in absorption and action of the herbicide. Morphological differences among species, spray retention, and endothall action contributed to selectivity following foliar applications.

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