1. “New” Herbicide Options for Sports Fields Tim R. Murphy The University of Georgia 2003 GTA Conference

2. Bermudagrass - The Big Three  Non-Overseeded Simazine (Princep, Wynstar, etc.) MSMA or DSMA 2,4-D (possibly a 2-way or three-way)

3. “Newer” Herbicides  TranXit - SU  Manor - SU  Corsair - SU  Revolver - SU  Monument – SU  Velocity – Not an SU, but similar MOA, not currently labeled on sports fields

4. “Newer” Herbicides  Speed Zone Broadleaf  Speed Zone - Southern  Power Zone Broadleaf  Drive (not real new, but underutilized0

5. TranXit – Griffin LLC  Poa control before overseeding DNAs, Dimension, Kerb, Rubigan  Poa control in non-overseeded bermuda, centipede and zoysia Triazines, Kerb, Diquat  Spring transition aid in overseeded bermuda Manor, Revolver, Monument, Kerb, Embark  LABELED on SPORTS FIELDS

6. Weeds Controlled by TranXit  annual bluegrass  ryegrass spp.  little barley  tall fescue  blue-eyedgrass  rough bluegrass  common chickweed  shepherd’s-purse  henbit  field pansy  cutleaf eveningprimrose  spotted spurge  pennywort (dollarweed)

7. TranXit  Rimsulfuron 25DF  Sulfonylurea  2.0 to 4.0 ozs. product/acre  Chemically degraded, more rapid under alkaline or acid conditions  T1/2 in soil is 1.7 to 4.3 days

8. Georgia Experiments - Griffin  ‘Tifway’ bermudagrass, 0.75 in. ht.  Overseeded Oct. 17, 2000  ‘TourStar’ perennial ryegrass blend  Irrigated site  25 gpa

9. Herbicide Rates  TranXit – 1, 2, 4 and 8 oz./acre  Dimension 1EC – 2.0 qts./acre  Barricade 65DG – 0.75 lbs./acre  Balan 2.5G – 80 lbs./acre

10. Perennial ryegrass density. * * *

11. Poa annua control. * * *

12. TranXit did not injure Tifway bermudagrass applied: a)4, 2 or 1 wk in advance of overseeding b)Tank-mixed with Rubigan c)Applied after Dimension, Barricade or Balan were applied 6 WBO

13. Manor, Blade  Metsulfuron 60 DF  Excellent option for ‘Pensacola’ bahiagrass and broadleaf control in warm-season turfgrasses  Do not use on bahiagrass  Low rate - < 1.0 oz. product/acre  Use with nonionic surfactant  LABELED on SPORTS FIELDS

14. Corsair - Riverdale  Chlorsulfuron 75%  Used primarily for spot control of clumpy tall fescue in bermuda - works slowly  Repeat application in 60 d  LABELED on SPORTS FIELDS

15. Overseeded Bermudagrass  Preemergence options for Poa annua Kerb - 60 to 90 days or charcoal Dimension – 8 wks Barricade – 8 wks Balan – low rate, 6 weeks Rubigan, Patchwork – cost limits use to greens Prograss – greenup issue

16. New Poa annua Options in Overseeded Bermudagrass  TranXit – rimsulfuron, t1/2 = 1.7 to 3.4 days  Revolver – foramsulfuron, t1/2 = 1 to 12 days LABELED ON SPORTS FIELDS?????????  Persistence is less in acid than alkaline soils

17. Revolver – Bayer Environ. Sciences  Foramsulfuron - 0.19SC, POST  First liquid sulfonylurea, no NIS required  4.4 to 26.2 fl. ozs. product/acre (use high rate for centipede suppression and goosegrass)  t1/2 in soil is 1 to 12 days  Chemically degraded, more rapid under alkaline or acid conditions

18. Revolver  Poa control before overseeding [2 WBS] DNAs, Dimension, Kerb, Rubigan, TranXit  Poa control in non-overseeded bermuda and ‘Meyer’ zoysia Triazines, Kerb, Diquat  Spring transition aid in overseeded bermuda Manor, TranXit, Monument, Kerb, Embark  NON-RESIDENTIAL USE ONLY

19. Weeds Controlled by Revolver  annual bluegrass  ryegrass spp.  little barley  tall fescue  rough bluegrass  bentgrass  henbit  bentgrass  goosegrass

20. Goosegrass Control - Griffin  ‘Tifway’ bermudagrass, 0.75 in. ht.  Irrigated site  25 gpa  Revolver: 17.4, 26.2 fl. ozs./ac  MSMA + Sencor: 2.7 pts. + 2.7 ozs./ac  Illoxan: 1.4 qts./ac  Applied 6-12 and 6-19, 2002  2 to 3 tiller goosegrass

21. Goosegrass control with Revolver. 2002.

22. Poa annua Control - Griffin  ‘Tifway’ bermudagrass, 0.625 in. ht.  Irrigated site  25 gpa  Revolver: 8.8, 17.4 fl. ozs./ac – appl. 2 or 1 WBS  TranXit: 2.0 oz./ac – appl. 2 WBS  Prograss: 1.0 gal./ac – 6 WPS  “Sunrise Primo’ seeded 11-01-2002

23. Effect of Revolver on Ryegrass Establishment. 2002/3.

24. Effect of Revolver on Poa annua control. 2002/3.

25. Monument– Syngenta  Trifloxysulfuron-sodium 75 WDG, POST  0.1 to 0.56 ozs. product/acre (use higher rates for sedges and Poa annua)  t1/2 in soil is 5 to 15 days  Chemically degraded, more rapid under alkaline or acid conditions  Add NIS at 0.25% v/v

26. Monument  Poa control in non-overseeded bermuda and zoysia Triazines, Kerb, Diquat, Revolver, TranXit  Spring transition aid in overseeded bermuda Manor, TranXit, Monument, Kerb, Embark, Revolver  Broadleaf weed and sedge control (winter and summer)  NON-RESIDENTIAL USE ONLY

27. Weeds Controlled by Monument  annual bluegrass  ryegrass spp.  little barley  rough bluegrass  torpedograss  tall fescue  henbit  dichondra  Va. Buttonweed  nutsedge (yellow and purple)  green kyllinga  carpetweed  spotted spurge

28. Monument Transition Project - 2001  GA Station  Perennial ryegrass – ‘Sunrise Primo’  ‘Tifway’ bermudagrass  0.75 in. clip height  2 appl. – 5/16 and 6/14  25 gpa  0.25% v/v NIS with all herbicides except Kerb

29. Monument – One Appl. (5/16/01)

30. Monument – Two Appl. (5/16 + 6/14/01)

31. MONUMENT – One Appl. (5/16/01) MON 0.1MON 0.3Kerb 1.5UTC

32. Monument – Two Appl. (5/16 + 6/14/01) MON 0.1MON 0.3TranXit 2UTC

33. Turf17-03: Photo April 9, 2003, NIS left, MSO right Velocity, 1.3 fb 1.3 oz/ac 2/18 + 3/03 3/03 + 3/21

34. Other Herbicides in Development  Flazasulfuron (Katana) -ISK BioSciences Sulfonylurea  Sulfosulfuron (Battalion) – Monsanto Sulfonylurea  Fluroxypyr (Spotlight) – DowAgroSciences Pyridine

35. Flazasulfuron (Katana) -ISK BioSciences  Bermuda, zoysia, centipede  St. Augustine and cool-seasons not tolerant  Spring transition aid, seedling crabgrass (<4-lf), nutsedge and kyllinga, numerous broadleaf weeds

36. Sulfosulfuron (Battalion)- Monsanto  Bermuda (most tolerant), St. Augustine, centipede, zoysia  Cool-season tolerance is low and highly rate dependent  Spring transition aid, nutsedges, kyllinga

37. Fluroxypyr (Spotlight) - DowAgroSciences  Cool-season tolerance is good  Warm-season tolerance is low and highly rate dependent  May see as an ingredient in other 2- and 3-way broadleaf control herbicides

38. New PBI Gordon Broadleaf Herbicides Herbicidecarfentrazone2,4-DMCPAMCPPdicamba lbs. ai/gallon Power Zone0.04--2.2 a 0.440.22 Speed Zone0.051.53 a --0.480.14 Speed Zone (Southern) 0.040.52 a --0.20.05 a Ester

39. Carfentrazone  Triazolinone family  Post, contact activity, cell membrane disrupter  Rapidly absorbed, only limited translocation  No soil activity t 1/2 - 2.5 to 4 d non-mobile  Negligible volatility

40. Why add carfentrazone?  Better activity in cool weather  Faster development of control symptoms hours vs. days complete control in 7 to 14 days  Better activity on spurges

41. White Clover Control – Griffin - 2001

42. Tall Fescue Injury – Griffin - 2001

43. Common Bermuda Injury – Griffin - 2001

44. New PBI Gordon Broadleaf Herbicides TurfgrassPowerZoneSpeedZoneSpeedZone –South. Ky. BluegrassXXX Tall FescueXXX Fine FescueXXX RyegrassXXX BermudagrassXXX CentipedegrassX St. AugustineX Sea. PaspalumX ZoysiaXXX

45. PowerZone & SpeedZone Formulations  Repeat appl. in 2 to 6 wks if needed  Newly seeded delay appl. until after 2 nd mowing  Newly sodded, sprigged or plugged delay appl. for 3 to 4 weeks  Avoid green-up appls. on St. Aug.

46. PowerZone & SpeedZone Formulations  Avoid appl. at air temps. > 90 F.  Can reseed 2 weeks after application  Do not mow 1 to 2 d before or after application  Needs 24 hr rain-free period

47. Drive - BASF  Quinclorac 75 DF  Add crop oil concentrate (2.0 pts./acre)  Labeled on tall fescue, zoysiagrass, bermudagrass established, at seeding/sprigging, during “grow-in”

48. Drive - BASF  Controls crabgrass, white clover, hop clovers, speedwell, dollarweed  Torpedograss - requires 2 to 3 applications  Will not control goosegrass or annual bluegrass  Use with extreme caution near tomatoes, bell peppers, etc.

49. Practical Tips  Use only labeled herbicides  Get the right equipment  Train your applicator  Calibrate all equipment  Control weeds during the off-season or off-times

50. www.georgiaturf.com A pretty d--- good web page for turfgrasses!!