Now You Seed It, Now You Don’t

By Larry Gilhuly, director, Northwest Region
May 24, 2011

Spring is the time of year when all plants like to return to normal and strut their stuff.  In the world of turfgrass, no grass seems to enjoy the spring more than the hated/loved Poa annua.  In the Pacific Northwest (commonly referred to as Poa annua central) this grass has received its signal from nature with full bloom occurring all over the region.  However, a recent visit to Palouse Ridge Golf Course at Washington State University (WSU) shows at least one very impressive method to eliminate the seeds and dramatically reduce the overall Poa annua populations on fairways.

Researchers at WSU have now completed two years of research on a plot of Kentucky bluegrass fairway that was inundated with Poa annua.  As can be noted in the photo, various combinations of mesotrione (Tenacity), ethofumesate (Prograss), bispyribac-sodium (Velocity) and prodiamine (Barricade) are producing very good results, and not just with Poa annua.  Todd Lupkes, CGCS, reports that this combination also has been very effective in removing most broadleaf weeds and several persistent grassy weeds.  For an outstanding PowerPoint presentation on this research at WSU, see the 2010 Turfgrass Research Highlights  to view all of the results with these various products.  For those interested in reducing this grass from their fairways, tees or roughs, the information and results are very impressive.  For those not so inclined, read on.

Although the removal of Poa annua is not an option for most golf courses in the Pacific Northwest, the troublesome issue of seedheads on greens has once again hit with a vengeance.  Chemical control has helped by using Proxy, but the perpetual rain that seemed to never end in March, April and early May has lessened the results with this material this year.  In its place, many superintendents are getting good results with the old-time combination of light vertical mowing and brushing.  Both passive and power brush units are producing acceptable results at many courses, with various brushes beginning to make a comeback to battle this issue.  For more on this topic, please see Bring Back Brushing by Brian Whitlark in the March 25, 2011 Green Section Record.

As a final note, remember that Poa annua seedheads will not last forever, and we will be in the middle of the summer in the blink of an eye.  Then we can talk about bentgrass seed.

 

Source:  Larry Gilhuly, lgilhuly@usga.org 

 

Partner Links
AmEx image
AmEx image
AmEx image
AmEx image
Chevron
   

The USGA and Chevron have committed to using the game of golf to encourage students in science, technology, engineering and math (STEM) disciplines. This commitment has led to the creation of extensive golf-focused STEM teaching tools, and has resulted in charitable contributions to support golf-related programs through Eagles for Education™

At U.S. Open Championships the Chevron STEM ZONE™ is an interactive experience highlighting the science and math behind the game of golf through a variety of hands-on exhibits and experiments.

The partnership has also produced educational materials such as the Science of Golf video series and a nationally-distributed newspaper insert which are provided to teachers as tools to enhance existing curriculum in schools. These lessons teach the science behind the USGA’s equipment testing, handicapping, and agronomy efforts.

For more interactive experiences featuring golf-focused STEM lessons, visit the partnership homepage.


Chevron image
Rolex
   

Rolex has been a longtime supporter of the USGA and salutes the sportsmanship and great traditions unique to the game. This support includes the Rules of Golf where Rolex has partnered with the USGA to ensure golfers understand and appreciate the game.

As the official timekeeper of the USGA and its championships, they also provide clocks throughout host sites for spectator convenience.

For more information on Rolex and their celebration of the game, visit the Rolex and Golf homepage.



Rolex image
IBM
   

IBM has partnered with the USGA to bring the same technology, expertise, and innovation it provides to businesses all over the world to the USGA and golf's national championship.

IBM provides the information technology to develop and host the U.S. Open’s official website, www.usopen.com, as well as the mobile apps and scoring systems for the three U.S. Open championships. These real-time technology solutions provide an enhanced experience for fans following the championship onsite and online.

For more information on IBM and the technology that powers the U.S. Open and businesses worldwide, visit http://www.usopen.com/IBM

AmEx image
Lexus
   

Lexus is committed to partnering with the USGA to deliver a best-in-class experience for the world’s best golfers by providing a fleet of courtesy luxury vehicles for all USGA Championships.

At each U.S. Open, Women’s Open and Senior Open, Lexus provides spectators with access to unique experiences ranging from the opportunity to have a picture taken with both the U.S. Open and U.S. Women’s Open trophies to autograph signings with legendary Lexus Golf Ambassadors in the Lexus Performance Drive Pavilion.

For more information on Lexus, visit http://www.lexus.com/

AmEx image
American Express
   

Together, American Express and the USGA have been providing world-class service to golf fans since 2006. By creating interactive U.S. Open experiences both onsite and online, American Express enhances the USGA’s effort to make the game more accessible and enjoyable for fans.

For more information on American Express visit www.americanexpress.com/entertainment


AmEx image