The Fate of Late‐Fall‐Applied Nitrogen in Creeping Bentgrass and Annual Bluegrass

cftm ◽  
2018 ◽  
Vol 4 (1) ◽  
pp. 1-5
Author(s):  
Kevin W. Frank ◽  
Thomas A. Nikolai ◽  
Aaron Hathaway ◽  
Zhu Williams
Keyword(s):  
Creeping Bentgrass ◽  
Annual Bluegrass ◽  
Late Fall ◽  
Applied Nitrogen

scholarly journals Genetic Variation Among Colletotrichum graminicola Isolates from Four Hosts Using Isozyme Analysis

Plant Disease ◽  
2004 ◽  
Vol 88 (4) ◽  
pp. 402-406 ◽  
Author(s):  
B. J. Horvath ◽  
J. M. Vargas
Keyword(s):  
Genetic Variation ◽  
Genetic Distance ◽  
Geographic Origin ◽  
Creeping Bentgrass ◽  
Genetic Distances ◽  
Colletotrichum Graminicola ◽  
Annual Bluegrass ◽  
Close Relationship ◽  
Host Origin ◽  
Serious Disease

Anthracnose basal rot (ABR) is a serious disease of turfgrasses that is caused by the pathogen Colletotrichum graminicola. The relationships of isolates causing ABR on turfgrasses to those causing disease on important crop hosts (maize, sorghum) remain unresolved. Genetic variation among isolates from annual bluegrass, creeping bentgrass, maize, and sorghum was evaluated based on host origin and geographic origin. Isozymes were used to estimate the genetic variation of the isolates. Five enzyme systems comprising 16 alleles from 5 loci were used. Allele frequencies, genetic distance, and linkage disequilibrium values were calculated for isolates based on both host and geographic origin. Isolates from creeping bentgrass and annual bluegrass were the most closely related based on Nei's genetic distance, while isolates from maize and sorghum were the most distantly related, consistent with their known species-level relationship. Isolates from annual bluegrass and creeping bentgrass had different genetic distances to isolates from both maize and sorghum. Annual bluegrass isolates from different geographic regions had the smallest genetic distance values observed in this study, indicating a very close relationship regardless of geographic origin. Based on these data, it appears that host origin, not geographic origin, plays a more important role in the genetic diversity of these fungi.

Monthly Flurprimidol Applications Reduce Annual Bluegrass Populations in a Creeping Bentgrass Fairway

2007 ◽  
Vol 4 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Cale A. Bigelow ◽  
Glenn A. Hardebeck ◽  
B. Todd Bunnell
Keyword(s):  
Creeping Bentgrass ◽  
Annual Bluegrass

Physiological Responses of Annual Bluegrass and Creeping Bentgrass to Contrasted Levels of O2 and CO2 at Low Temperatures

Crop Science ◽  
2009 ◽  
Vol 49 (2) ◽  
pp. 671-689 ◽  
Author(s):  
Yves Castonguay ◽  
Guillaume Thibault ◽  
Philippe Rochette ◽  
Annick Bertrand ◽  
Sophie Rochefort ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Physiological Responses ◽  
Creeping Bentgrass ◽  
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.

Plant Growth Regulators Applied in Winter Improve Annual Bluegrass (Poa annua) Seedhead Suppression on Golf Greens

2017 ◽  
Vol 31 (5) ◽  
pp. 701-713 ◽  
Author(s):  
Shawn D. Askew
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Treatment Program ◽  
Creeping Bentgrass ◽  
Late Winter ◽  
Floral Initiation ◽  
Early Application ◽  
Golf Greens ◽  
Annual Bluegrass

Annual bluegrass seedhead suppression on golf greens by spring-applied plant growth regulators (PGR) has been erratic between years and locations. To effectively suppress annual bluegrass seedheads on greens, current information suggest ethephon must be applied before floral initiation. Rogue seedheads, however, can sometimes be found in late winter indicating that a variable proportion of annual bluegrass plants may induce floral initiation in winter. Studies were conducted in Blacksburg and Harrisonburg, VA at five separate sites between 2011 and 2012 to determine if winter applications of ethephon or mefluidide would improve annual bluegrass seedhead suppression when applied in advance of a spring, two-treatment program. A spring, two-treatment program of ethephon plus trinexapac-ethyl reduced annual bluegrass seedhead cover 22 to 55% depending on trial and less than similar mefluidide programs. Applying an early application of ethephon in January or February prior to the spring treatment program resulted in 5 to 7 times less seedhead cover at cover maxima than the spring treatment program alone. Ethephon did not injure creeping bentgrass and caused only slight and transient discoloration to annual bluegrass. Mefluidide injured both creeping bentgrass and annual bluegrass and reduced annual bluegrass population density in late spring. Programs that consisted of an early ethephon application, a spring treatment of triademifon, and two spring treatments of ethephon plus trinexapac ethyl improved seedhead suppression and turf quality but slightly increased annual bluegrass injury. Methiozolin suppressed annual bluegrass seedheads primarily through severe injury to annual bluegrass, which led to a decline in turfgrass quality and NDVI but a substantial increase in creeping bentgrass cover. Applying PGRs in winter is a novel concept and may substantially improve ethephon consistency and performance for annual bluegrass seedhead suppression on greens.

scholarly journals Fall Control of Japanese Beetle Grubs with Conventional and Experimental Formulations on Turfgrass in Wayne Pa, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 312-312
Author(s):  
P. R. Heller ◽  
R. Walker
Keyword(s):  
Soil Temperature ◽  
Treatment Time ◽  
Creeping Bentgrass ◽  
Product Distribution ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Japanese Beetle ◽  
Annual Bluegrass ◽  
Water Ph ◽  
Loam Soil

Abstract The turfgrass area consisted primarily of annual bluegrass (50%) and creeping bentgrass (50%). Treatment plots were 9 × 6 ft, arranged in a RCB design and replicated 3 times. Granular formulations were applied with a hand-held shaker and mixed with a fine grade top-dressing sand to facilitate product distribution. Liquid formulations were applied with a CO2 compressed air sprayer with 4 8004VS TeeJet nozzles mounted on a 6 ft boom, operating at 28 psi, and delivering 5 gal/1000 ft2. At treatment time (23 Aug) the following soil and environmental conditions existed: air temperature, 66°F; soil temperature at 1 inch depth, 70°F; soil temperature at 2 inch, 69°F; RH, 85%; amount of thatch, 0.125 inches; soil type, loam; soil particle size analysis: 37.0% sand, 45.0% silt, 18.0% clay; organic matter, 5.0%; soil moisture (oven baked), 31.6; water pH, 7.0; soil pH, 5.1; and overcast skies. Immediately after treatment the experimental area was irrigated with 0.5 inches of water. Posttreatment counts were made 49 DAT (11 Oct). Japanese beetle grub control was evaluated by removing four 0.087 ft2 sod samples from each replicate, and the total number of grubs were recorded and converted to a ft2 count. Sod samples were removed with a 4 inch diam cup cutter.

Geostatistical Analysis of Dollar Spot Epidemics Occurring on a Mixed Sward of Creeping Bentgrass and Annual Bluegrass

Crop Science ◽  
2007 ◽  
Vol 47 (3) ◽  
pp. 1206-1216 ◽  
Author(s):  
B. J. Horvath ◽  
A. N. Kravchenko ◽  
G. P. Robertson ◽  
J. M. Vargas
Keyword(s):  
Creeping Bentgrass ◽  
Geostatistical Analysis ◽  
Dollar Spot ◽  
Annual Bluegrass

THATCH CONTROL ON CREEPING BENTGRASS TURF

1980 ◽  
Vol 60 (4) ◽  
pp. 1209-1213 ◽  
Author(s):  
J.L. EGGENS
Keyword(s):  
Creeping Bentgrass ◽  
Annual Bluegrass ◽  
Putting Green ◽  
Nitrogen Treatments ◽  
Effective Treatments

The effectiveness of thatch control practices commonly employed in Ontario on Penncross creeping bentgrass turf maintained as a putting green was evaluated from July 1976 to October 1979. The most effective treatments were coring and vertical mowing followed by topdressing, and topdressing alone. The least amount of winter injury occurred in plots where coring was followed by topdressing. Coring reduced thatch accumulation more than did vertical mowing. Vertical mowing increased winter injury and annual bluegrass content in the plots more than did coring. Thatch accumulation was less at the 5-mm than at the 8-mm mowing height. Nitrogen treatments of 2 and 4 kg N∙100 m−2 did not influence thatch accumulation.

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