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Lowmow Kentucky Bluegrass Variety Performance for Fairways Researchers: Chicago District Golf Assoc. Derek Settle, Tim Sibicky, Nick DeVries Paragraph 1 by Peter Westfall, 2011 student intern, Purdue University Goal: Evaluate Kentucky bluegrass variety performance under fairway conditions in Chicago. Location: Sunshine Course’s 3 Kentucky bluegrass fairway in play – Lemont, Illinois Background: Dr. Cale Bigelow, my turfgrass professor at Purdue, always told me that Kentucky Bluegrass (KBG) is the Cadillac of lawn grass in the Midwest, and when you’re buying a Cadillac what’s one of the most important details that you can choose? Color. Now, with all the advancements in turf cultivar research you can choose the color of your KBG just like you can choose the color of your Cadillac that sits in the driveway. Whether you’re looking for a nice dark green, almost blue or maybe a more yellow green for your golf course or home lawn, KBG has a color for you. For example, based on visual color data collected in midJune we found one cultivar worthy of a 9 and it was Moonbeam. Moonbeam was “…developed by Pure Seed Testing and tested as Y2K136. A cross between Midnight and Moonlight Kentucky bluegrasses, Moonbeam is an incredibly dark green bluegrass that is darker green than both its parents” (Rose AgriSeed Inc.). This explains its dark green, almost blue color. In contrast, we found Julia to be the lightest green with an average visual color rating of 4.3. On fairways, Kentucky bluegrass offers value with less input compared to creeping bentgrass. For example, inputs of fungicides will be much lower for dollar spot (Sclerotinia homoeoecarpa). Additionally, Kentucky bluegrass has excellent resistance to brown patch (Rhizoctonia solani). However, vulnerabilities still exist such as poor greenup ability in spring. Additionally, newer varieties must have resistance summer patch (Magnaporthe poae), a root disease associated summers that are both hot and wet – like 2010 and 2011. Brief Material and Methods: A total of 52 varieties were seeded in 5 ft. by 10 ft. plots on 2 July, 2009 using a randomized complete block design with 3 replications. The trial’s proximity near a building reduces air movement and was selected to favor disease development. Hand seeding took place at a rate of 2 lbs per 1000 ft 2 . Plots were managed at a height of 0.75 inch, irrigated as needed, and fertilized annually with 2 lbs N per1000 sq. ft. Monthly data in 2011 included, visual quality, visual color, NDVI, herbicide tolerance, weed encroachment and spring greenup.

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Low‐mow Kentucky Bluegrass Variety Performance for Fairways Researchers: Chicago District Golf Assoc. ‐ Derek Settle, Tim Sibicky, Nick DeVries Paragraph 1 by Peter Westfall, 2011 student intern, Purdue University 

 Goal: Evaluate Kentucky bluegrass variety performance under fairway conditions in Chicago.   Location: Sunshine Course’s 3 Kentucky bluegrass fairway in play – Lemont, Illinois   Background: Dr. Cale Bigelow, my turfgrass professor at Purdue, always told me that Kentucky Bluegrass (KBG) is the Cadillac of lawn grass in the Midwest, and when you’re buying a Cadillac what’s  one  of  the most  important  details  that  you  can  choose?    Color.    Now, with  all  the advancements  in turf cultivar research you can choose the color of your KBG  just  like you can choose the color of your Cadillac that sits  in the driveway.   Whether you’re  looking for a nice dark green, almost blue or maybe a more yellow green for your golf course or home lawn, KBG has a color for you.  For example, based on visual color data collected in mid‐June we found one cultivar worthy  of  a  9  and  it was Moonbeam.   Moonbeam was  “…developed  by  Pure  Seed Testing and tested as Y2K‐136.  A cross between Midnight and Moonlight Kentucky bluegrasses, Moonbeam  is an  incredibly dark green bluegrass  that  is darker green  than both  its parents” (Rose Agri‐Seed Inc.).  This explains its dark green, almost blue color.  In contrast, we found Julia to be the lightest green with an average visual color rating of 4.3.   

On  fairways, Kentucky bluegrass offers value with  less  input compared to creeping bentgrass.  For  example,  inputs  of  fungicides  will  be  much  lower  for  dollar  spot  (Sclerotinia homoeoecarpa).  Additionally,  Kentucky  bluegrass  has  excellent  resistance  to  brown  patch (Rhizoctonia solani).  However, vulnerabilities still exist such as poor green‐up ability in spring.  Additionally, newer varieties must have resistance summer patch (Magnaporthe poae), a root disease associated summers that are both hot and wet – like 2010 and 2011. 

Brief Material and Methods: A total of 52 varieties were seeded in 5 ft. by 10 ft. plots on 2 July, 2009 using a randomized complete block design with 3 replications. The trial’s proximity near a building reduces air movement and was selected to favor disease development.  Hand seeding took place at a rate of 2 lbs per 1000 ft2.  Plots were managed at a height of 0.75 inch, irrigated as needed, and fertilized annually with 2  lbs N per1000 sq. ft. Monthly data  in 2011  included, visual quality, visual color, NDVI, herbicide tolerance, weed encroachment and spring green‐up. 

 

Table 1. Commercial Kentucky bluegrass varieties tested for fairway performance in Lemont, IL. 

Entry #, variety name  Commercial source Entry #, variety name Commercial source

1. Rhapsody  DLF  27. Blue Chip Jacklin Seed 

2. Rhythm  DLF  28. Everest Jacklin Seed 

3. Harmonie  DLF  29. Impact Jacklin Seed 

4. Julia  DLF  30. Limousine Jacklin Seed 

5. Julius  DLF  31. NuBlue Plus Jacklin Seed 

6. Moonlight SLT  Scotts  32. NuChicago Jacklin Seed 

7. Moonshine  Scotts  33. NuGlade Jacklin Seed 

8. 102S‐117  Scotts  34. Solar Eclipse Jacklin Seed 

9. Full Moon  Scotts  35. Sudden Impact Jacklin Seed 

10. Jumpstart  Scotts  36. Total Eclipse Jacklin Seed 

11. Prosperity  Scotts  37. Tsunami Jacklin Seed 

12. Moonbeam  Scotts  38. PST‐101‐92 Pure Seed Testing

13. Bewitched  Turf Merchants 39. PST‐103‐585 Pure Seed Testing

14. Bedazzled  Turf Merchants 40. PST‐101‐362 Pure Seed Testing

15. Blueberry  Turf Merchants 41. SR 2100 Seed Research

16. Blackberry  Turf Merchants 42. SR 2284 Seed Research

17. Bonaire  Turf Merchants 43. Touche Seed Research

18. Diva  ProSeeds  44. Arcadia Seed Research

19. Mystere  ProSeeds  45. Cheetah Seed Research

20. Princeton 105  ProSeeds  46. Kingfisher Seed Research

21. Guinness  ProSeeds  47. Bandera Seed Research

22. Ginney II  ProSeeds  48. Spitfire Seed Research

23. Alexa II  ProSeeds  49. Award Jacklin Seed 

24. Perfection  Allied Seed  50. Rugby II Jacklin Seed 

25. 4‐Season  Jacklin Seed 51. Angus Blue Turf Innovations

26. Beyond  Jacklin Seed 52. Rush Jacklin Seed 

 

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Images (2 with captions – also attached as full images) 

 Image 1. In March, spring green‐up of Kentucky bluegrass varieties was visibly different.  Sunshine Course, Lemont, IL.  Settle 3‐23‐11  

 Image 2.  By the end of June plots were reviewed with signs and variety differences were color, density and encroachment by crabgrass.  Sunshine Course, Lemont, IL.  Settle 6‐29‐11 

 

 Image 3.  In August dollar spot became obvious in certain Kentucky bluegrass varieties.  Sunshine Course, Lemont, IL.  Settle 8‐11‐11