Top 5 Practices To Avoid During Overseed Preparations

By Brian Whitlark and Dr. David Kopec, Plant Specialist, University of Arizona
October 12, 2011

Overseeding preparations are nearly complete for this golf course. Light verticutting opened up the turf canopy and only moderate scalping occurred. 

 

Golf course superintendents are in the midst of preparing the bermudagrass for overseeding right now in the desert southwest.  The following summary points highlight the top 5 practices to avoid during overseeding preparations. 

  1. Aggressive verticutting Stolons may be severed when verticut blades are set at a depth below 0.125.  When verticutting alone does not stand the turf up properly, try brushing after verticutting and follow with another mower pass or possibly a second light vertical mowing.  Next summer, you will regret injuring stolons in the fall in quest of perfect seed-to-soil contact.
  2. Spray a growth regulator prior to raising heights This practice results in tight, dense turf that will need excessive verticutting and scalping that otherwise would be unnecessary.  Raise heights, then apply the growth regulator immediately prior to scalping.
  3. Excessive scalpingAvoid scalping in excess of 50% of the mowing height at overseeding.  For example, if the fairway mowing height is 0.500 inches at overseeding, do not scalp any lower than 0.250 inches.  With this in mind, it is always best to raise mowing heights several weeks prior to overseeding for more effective scalping.  If you are like many superintendents this year, the bermudagrass may have just filled in prior to overseeding.  If this is the case, do not scalp lower than 0.300 in.
  4. Apply excessive nitrogen rates immediately prior to overseedingNitrogen (N) applied in an effort to fill bare ground prior to overseeding, can create horizontal stolons that may fill in the voids, but these stolons will have little or no carbohydrates to store for winter.  It is likely that these plants will not survive the winter.  It is best to discontinue N inputs 3-4 weeks prior to overseeding.
  5. Heavy topdressing on greens following seedingA “sand blanket” applied up to 3/16 of an inch may work well with Tifdwarf or Tifgreen 328 greens; however, lighter rates should be used on the ultradwarf bermudagrasses.  Sand, applied at this depth on the ultradwarfs, places the crown of the overseeded turf too high in relation to the deeper bermudagrass stolons.  As a result, the mat formed from cool season grasses will delay bermudagrass recovery the following year.

 

Source: Brian Whitlark, bwhitlark@usga.org 

              Dr. David Kopec, dkopec@ag.arizona.edu 

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