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“New” Herbicide Options for Sports Fields

“New” Herbicide Options for Sports Fields. Tim R. Murphy The University of Georgia. 2003 GTA Conference. Bermudagrass - The Big Three. Non-Overseeded Simazine (Princep, Wynstar, etc.) MSMA or DSMA 2,4-D (possibly a 2-way or three-way). “Newer” Herbicides. TranXit - SU Manor - SU

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“New” Herbicide Options for Sports Fields

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  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. 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) Weeds Controlled by TranXit

  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: • 4, 2 or 1 wk in advance of overseeding • Tank-mixed with Rubigan • 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. annual bluegrass ryegrass spp. little barley tall fescue rough bluegrass bentgrass henbit bentgrass goosegrass Weeds Controlled by Revolver

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

  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 0.1 MON 0.3 Kerb 1.5 UTC

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

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

  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 aEster

  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

  45. PowerZone & SpeedZone Formulations • Repeat appl. in 2 to 6 wks if needed • Newly seeded • delay appl. until after 2nd 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!!

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