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New Herbicide Options for Sports Fields

• Tim R. Murphy
• The University of Georgia

2003 GTA Conference
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Bermudagrass - The Big Three

• Non-Overseeded
• Simazine (Princep, Wynstar, etc.)
• MSMA or DSMA
• 2,4-D (possibly a 2-way or three-way)

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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

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Newer Herbicides

• Speed Zone Broadleaf
• Speed Zone - Southern
• Power Zone Broadleaf
• Drive (not real new, but underutilized0

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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

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Weeds Controlled by TranXit

• annual bluegrass
• ryegrass spp.
• little barley
• tall fescue
• blue-eyedgrass
• rough bluegrass

• common chickweed
• shepherds-purse
• henbit
• field pansy
• cutleaf eveningprimrose
• spotted spurge
• pennywort (dollarweed)

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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

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Georgia Experiments - Griffin

• Tifway bermudagrass, 0.75 in. ht.
• Overseeded Oct. 17, 2000
• TourStar perennial ryegrass blend
• Irrigated site
• 25 gpa

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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

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Perennial ryegrass density.



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Poa annua control.



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• 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

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Manor, Blade

• Metsulfuron 60 DF
• Excellent option for Pensacola bahiagrass and
  broadleaf control in warm-season turfgrasses
• Do not use on bahiagrass
• Low rate - lt 1.0 oz. product/acre
• Use with nonionic surfactant
• LABELED on SPORTS FIELDS

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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

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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

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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

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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

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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

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Weeds Controlled by Revolver

• annual bluegrass
• ryegrass spp.
• little barley
• tall fescue
• rough bluegrass
• bentgrass

• henbit
• bentgrass
• goosegrass

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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

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Goosegrass control with Revolver. 2002.
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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

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Effect of Revolver on Ryegrass Establishment.
2002/3.
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Effect of Revolver on Poa annua control. 2002/3.
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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

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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

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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

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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

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Monument One Appl. (5/16/01)
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Monument Two Appl. (5/16 6/14/01)
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MONUMENT One Appl. (5/16/01)
MON 0.1
MON 0.3
Kerb 1.5
UTC
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Monument Two Appl. (5/16 6/14/01)
MON 0.1
MON 0.3
TranXit 2
UTC
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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
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Other Herbicides in Development

• Flazasulfuron (Katana) -ISK BioSciences
• Sulfonylurea
• Sulfosulfuron (Battalion) Monsanto
• Sulfonylurea
• Fluroxypyr (Spotlight) DowAgroSciences
• Pyridine

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Flazasulfuron (Katana) -ISK BioSciences

• Bermuda, zoysia, centipede
• St. Augustine and cool-seasons not tolerant
• Spring transition aid, seedling crabgrass
• (lt4-lf), nutsedge and kyllinga, numerous
  broadleaf weeds

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Sulfosulfuron (Battalion)- Monsanto

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

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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

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New PBI Gordon Broadleaf Herbicides
Herbicide carfentrazone 2,4-D MCPA MCPP dicamba
lbs. ai/gallon lbs. ai/gallon lbs. ai/gallon lbs. ai/gallon lbs. ai/gallon
Power Zone 0.04 -- 2.2a 0.44 0.22
Speed Zone 0.05 1.53a -- 0.48 0.14
Speed Zone (Southern) 0.04 0.52a -- 0.2 0.05
aEster
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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

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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

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White Clover Control Griffin - 2001
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Tall Fescue Injury Griffin - 2001
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Common Bermuda Injury Griffin - 2001
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New PBI Gordon Broadleaf Herbicides
Turfgrass PowerZone SpeedZone SpeedZone South.
Ky. Bluegrass X X X
Tall Fescue X X X
Fine Fescue X X X
Ryegrass X X X
Bermudagrass X X X
Centipedegrass X
St. Augustine X
Sea. Paspalum X
Zoysia X X X
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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.

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PowerZone SpeedZone Formulations

• Avoid appl. at air temps. gt 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

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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

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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.

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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

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