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.

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 Cool-season Turfgrass Response to Bispyribac-Sodium

HortScience ◽  
2005 ◽  
Vol 40 (5) ◽  
pp. 1552-1555 ◽  
Author(s):  
Darren W. Lycan ◽  
Stephen E. Hart
Keyword(s):  
Perennial Ryegrass ◽  
Tall Fescue ◽  
Field Experiments ◽  
Poa Pratensis ◽  
Creeping Bentgrass ◽  
Kentucky Bluegrass ◽  
Cool Season ◽  
Severe Stunting ◽  
Annual Bluegrass ◽  
Fine Fescue

Previous research has demonstrated that bispyribac-sodium can selectively control established annual bluegrass (Poa annua L.) in creeping bentgrass (Agrostis stolonifera L.). Annual bluegrass is also a problematic weed in other cool-season turfgrass species. However, the relative tolerance of other cool-season turfgrass species to bispyribac is not known. Field experiments were conducted at Adelphia, N.J., in 2002 and 2003 to gain understanding of the phytotoxic effects that bispyribac may have on kentucky bluegrass (Poa pratensis L.), perennial ryegrass (Lolium perenne L.), tall fescue (Festuca arundinacea (L.) Schreb.), and chewings fine fescue (Festuca rubra L. subsp. commutata Gaud.). Single applications of bispyribac at 37 to 296 g·ha–1 were applied to mature stands of each species on 11 June, 2002 and 10 June, 2003. Visual injury was evaluated and clippings were collected 35 and 70 days after treatment (DAT). Visual injury at 35 DAT increased as bispyribac rate increased. Kentucky bluegrass was least tolerant to bispyribac with up to 28% injury when applied at 296 g·ha–1. Injury on other species did not exceed 20%. Initial injury on perennial ryegrass, tall fescue, and chewings fine fescue was primarily in the form of chlorosis, while kentucky bluegrass exhibited more severe stunting and thinning symptoms. Bispyribac at rates from 74 to 296 g·ha–1 reduced kentucky bluegrass clipping weights by 19% to 35%, respectively, as compared to the untreated control at 35 DAT in 2002. Initial visual injury on perennial ryegrass, tall fescue, and chewings fine fescue dissipated to ≤5% by 70 DAT. However, recovery of kentucky bluegrass was less complete. These studies suggest that bispyribac-sodium has potential to severely injure kentucky bluegrass. Injury on perennial ryegrass, tall fescue, and chewings fine fescue appears to be less severe and persistent; therefore, bispyribac can be used for weed control in these species. Chemical names used: 2,6-bis[(4,6-dimethoxy-2-pyrimidinyl)oxy]benzoic acid (bispyribac-sodium).

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.

Role of Endothall in the Control of Annual Bluegrass in Turf

Weed Science ◽  
1972 ◽  
Vol 20 (6) ◽  
pp. 562-565 ◽  
Author(s):  
A. J. Turgeon ◽  
W. F. Meggitt ◽  
Donald Penner
Keyword(s):  
Poa Pratensis ◽  
Organic Matter Content ◽  
Creeping Bentgrass ◽  
Kentucky Bluegrass ◽  
Matter Content ◽  
Sand Culture ◽  
Annual Bluegrass ◽  
Underlying Soil ◽  
Sand Cultures

Endothall (7-oxabicyclo[2.2.1]heptane-2,3-dicarboxylic acid) was evaluated for controlling annual bluegrass(Poa annuaL.) infestations in Kentucky bluegrass(Poa pratensisL.) and creeping bentgrass(Agrostis stoloniferaL.) turfs. Growth of annual bluegrass was selectively suppressed by three applications of 0.6 kg/ha of endothall, two or three applications of 1.1 and 2.2 kg/ha, and one application of 4.5 kg/ha made to the single plant sand cultures. Field treatments were variable and seasonably dependent. Endothall selectively killed annual bluegrass when applied to roots in sand culture at a concentration of 2.7 × 10−4molar. A granular formulation of endothall provided selective control of annual bluegrass in field and greenhouse studies. High watering frequency prior to application, low organic matter content of the underlying soil, and predominance of the annual biotype of annual bluegrass enhanced the selective action at the lowest rates of endothall application.

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.

THE RESPONSE OF SOME KENTUCKY BLUEGRASS CULTIVARS TO COMPETITIVE STRESS FROM ANNUAL BLUEGRASS

1979 ◽  
Vol 59 (4) ◽  
pp. 1123-1128
Author(s):  
J. L. EGGENS
Keyword(s):  
Competitive Ability ◽  
Poa Pratensis ◽  
Kentucky Bluegrass ◽  
Poa Annua ◽  
Growth Chamber ◽  
Annual Bluegrass ◽  
Short Day

The ability of seven Kentucky bluegrass (Poa pratensis L.) cultivars to compete against annual bluegrass (Poa annua L.) under greenhouse and growth chamber conditions was evaluated. Under natural long days from June to November in the greenhouse and under a 15-h daylength in the growth chamber, annual bluegrass produced significantly more tillers than each of the Kentucky bluegrass cultivars. Under short day condition (10 h) in the growth chamber, the number of innovations produced by Sydsport Kentucky bluegrass was not significantly different from annual bluegrass. Under natural daylength of February and March in the greenhouse, the number of innovations produced by Baron, Glade and Sydsport Kentucky bluegrass cultivars was not significantly different from that produced by annual bluegrass. A method to evaluate the competitive ability of Kentucky bluegrass under daily 2-cm mowing height is described.

scholarly journals Postemergence Control of Annual Bluegrass with Mesotrione in Kentucky Bluegrass

HortScience ◽  
2012 ◽  
Vol 47 (4) ◽  
pp. 522-526 ◽  
Author(s):  
Joshua J. Skelton ◽  
William Sharp ◽  
Bruce E. Branham
Keyword(s):  
Environmental Conditions ◽  
Poa Pratensis ◽  
Kentucky Bluegrass ◽  
Field Trials ◽  
Poa Annua ◽  
Annual Bluegrass ◽  
Air Temperatures ◽  
Significant Application ◽  
Levels Of Control

Six field trials were conducted in 2009 and 2010 to study postemergence control of annual bluegrass (Poa annua L. var. Hausskn Timm) in kentucky bluegrass (Poa pratensis L.) with mesotrione. Mesotrione was applied at 11 different rate and application intervals to an area of kentucky bluegrass that was naturally infested with annual bluegrass. Mesotrione rates of 56 g·ha−1 applied two or three times per week for a total of 10 applications or 84 g·ha−1 applied two times per week for a total of seven applications provided consistent control of annual bluegrass but required significant application labor and resulted in minor kentucky bluegrass injury. Other treatments that required fewer applications, 110 g·ha−1 applied twice per week for five applications or 186 g·ha−1 per week for three applications, also achieved high levels of control under high air temperatures, but control levels can vary significantly as temperatures fluctuate and seasons change. Mesotrione can successfully control annual bluegrass in kentucky bluegrass when frequent applications at low rates are applied or when environmental conditions are conducive to control.

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