Evaluation of fungicide and plant growth regulator tank-mix programmes on dollar spot severity of creeping bentgrass

2006 ◽  
Vol 25 (9) ◽  
pp. 1032-1038 ◽  
Author(s):  
M.A. Fidanza ◽  
H.C. Wetzel ◽  
M.L. Agnew ◽  
J.E. Kaminski
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Creeping Bentgrass ◽  
Dollar Spot

Reducing Populations of Annual Bluegrass and Roughstalk Bluegrass in Creeping Bentgrass Fairways: A Nutritional Approach

1999 ◽  
Vol 13 (4) ◽  
pp. 829-834 ◽  
Author(s):  
Gregory E. Bell ◽  
Edward Odorizzi ◽  
T. Karl Danneberger
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Creeping Bentgrass ◽  
Field Studies ◽  
Golf Course ◽  
Irrigation Regime ◽  
Annual Bluegrass ◽  
Putting Green ◽  
And Control

Two field studies, a seeded study and a golf course study, were conducted to compare competition among creeping bentgrass, annual bluegrass, and roughstalk bluegrass when subjected to common weed control practices and foliar applications of iron and magnesium. A research site was selected for the seeded study and divided into 10 whole plots receiving irrigation at either 50 or 100% evapotranspiration deficit. Each whole plot was further divided into subplots receiving one of seven treatments: bensulide, ethofumesate, trinexapac-ethyl, foliar Mg, foliar Fe, foliar Mg plus foliar Fe, and control. The site was seeded to a mixture of creeping bentgrass, annual bluegrass, and roughstalk bluegrass in September 1995, and treatments began in March 1996. Annual bluegrass was reduced 29% in plots treated with foliar Fe and 65% in plots treated with foliar Fe plus foliar Mg. Roughstalk bluegrass was significantly reduced in seeded plots treated with foliar iron (50%), plant growth regulator (75%), and foliar iron plus foliar magnesium (100%). Annual bluegrass and roughstalk bluegrass proportions were not affected by irrigation regime. In a second study, the most effective treatment, foliar magnesium plus foliar iron, was tested on a working golf course fairway and on a practice putting green beginning April 1997 and ending November 1997. Treatments on the golf course fairway and practice putting green were ineffective due to the established, perennial nature of the annual bluegrass biotypes on these sites. Further research is required to improve the efficacy of nutritional treatments on these perennials.

scholarly journals Plant Growth Regulator Effects on Bacterial Etiolation of Creeping Bentgrass Putting Green Turf Caused by Acidovorax avenae

Plant Disease ◽  
2016 ◽  
Vol 100 (3) ◽  
pp. 577-582 ◽  
Author(s):  
Joseph A. Roberts ◽  
David F. Ritchie ◽  
James P. Kerns
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Creeping Bentgrass ◽  
High Rate ◽  
Turf Quality ◽  
Putting Green ◽  
Turfgrass Quality ◽  
Multiple Field ◽  
Ga Biosynthesis

Bacterial etiolation, caused by Acidovorax avenae, is a widespread problem in creeping bentgrass putting green turf. The symptoms normally appear as abnormally elongated turfgrass stems and leaves. Observations at multiple field sites suggest the involvement of plant growth regulators (i.e., GA-biosynthesis inhibitors) commonly applied to turf, alluding to a phytohormone imbalance caused by the bacterium. A 2-year field study examined the effects of trinexapac-ethyl, flurprimidol, and paclobutrazol on bacterial etiolation severity caused by A. avenae. Trinexapac-ethyl applied at 0.05 kg a.i. ha−1 every 7 days and 0.10 kg ha−1 every 14 days increased etiolation compared with all other treatments in both years. Flurprimidol and paclobutrazol were not different from the control but high-rate applications caused phytotoxicity that lowered turf quality early in 2014. When the etiolated turfgrass was removed with mowing, turfgrass treated with trinexapac-ethyl exhibited the highest turfgrass quality on most rating dates. Results from this work illustrate that using plant growth regulator materials with different modes of action is a solution to managing creeping bentgrass growth while limiting the potential for bacterial etiolation outbreaks.

scholarly journals Effect of the Growth Regulator Proxy on Creeping Bentgrass Fairway Turf

2000 ◽  
Vol 18 (1) ◽  
pp. 53-58
Author(s):  
John Stier ◽  
Zac Reicher ◽  
Glenn Hardebeck
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Untreated Control ◽  
Creeping Bentgrass ◽  
Golf Course ◽  
Turf Quality ◽  
Quality Ratings

Abstract Proxy is a newly-labeled plant growth regulator (PGR) for use on golf course and commercial turfgrass areas. Four rates of Proxy (ethephon), 2.3, 3.6, 4.6, and 9.1 kg ai/ha (2.0, 3.2, 4.1, and 8.2 lb ai/A,) were compared to Primo (trinexapac-ethyl) at 1.0 kg ai/ha (0.9 lb ai/A) and an untreated control for clipping reduction and effects on aesthetics of creeping bentgrass maintained as fairway turf. Treatments were applied three times at 28-day intervals during 1998 at locations in Indiana and Wisconsin. Proxy was as effective at reducing clipping yields as Primo, although the magnitude of effects varied between the two locations. In general, Proxy was more likely to reduce turf quality and color than Primo. All rates of Proxy reduced clipping weights similarly, but low rates were less likely to reduce color or quality ratings. Turf density was not affected by Proxy or Primo. Effects of Proxy on creeping bentgrass occurred within two weeks after application and generally dissipated within four weeks, whereas Primo effects occurred within one week after application and generally dissipated within three weeks. Turf quality was occasionally reduced following application of Proxy.

Influence of plant growth regulator and rhizobial inoculation on nodulation and soybean nitrogen contant

2007 ◽  
Vol 35 (2) ◽  
pp. 993-996 ◽  
Author(s):  
Sulejman Redžepović ◽  
Sanja Sikora ◽  
Josip Čolo ◽  
Mihaela Blažinkov ◽  
Marija Pecina
Keyword(s):  
Plant Growth ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Rhizobial Inoculation
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