Slide Presentation

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AUTHOR
Dr. Tim R. Murphy
The University of Georgia
Crop and Soil Sciences

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TABLE OF CONTENTS
  1. Weed Control in Sod Production Fields
  2. Weed Problems in Sod
  3. Cultural Control
  4. Hit or Miss vs. Planned Program
  5. PrePlant Weed Control
  6. Roundup Rate and Bermudagrass Control
  7. Bermuda Control with Roundup - 1 yr.
  8. Bermudagrass Control with Roundup (averaged across Tifway, Tifgreen, Tifdwarf, Ormond)
  9. 'Newer' Sod Herbicides
  10. 'Newer' Sod Herbicides
  11. Envoy (Valent)
  12. Envoy - Bermuda Suppression
  13. Envoy
  14. Bermuda Suppression with Envoy - 1998
  15. Bermudagrass Suppression -1998
  16. Bermudagrass Suppression -1998
  17. Centipede Injury - Envoy - 1998
  18. Sethoxydim (Vantage) - Centipedegrass
  19. Vantage - Centipedegrass
  20. Vantage - Bahiagrass Suppression
  21. Lontrel - DowAgrosciences
  22. Turfgrass Tolerance to Lontrel
  23. Confront - DowAgrosciences
  24. Turfgrass Tolerance to Confront
  25. Confront
  26. Drive - TopPro
  27. Drive - TopPro
  28. Manor, Blade
  29. Corsair - Riverdale
  30. Prompt - TopPro
  31. Kerb - Rohm & Haas
  32. TURFGRASS TOLERANCE TO HERBICIDES
  33. TURFGRASS TOLERANCE TO HERBICIDES
  34. TURFGRASS TOLERANCE TO HERBICIDES
  35. At-Sprigging Options
  36. Ronstar 2G and 50WSP - At Sprigging
  37. Atrazine and Simazine - At Sprigging
  38. TOLERANCE OF NEWLY-SPRIGGED CENTIPEDEGRASS TO ATRAZINE AND SIMAZINE
  39. The majority of herbicides used in turfgrasses for preemergence annual grass control are dinitroanilines and dithiopyr
  40. DNA and Dimension root inhibition
  41. Root Inhibition
  42. Sedge Herbicides - Turfgrasses
  43. Tufted Lovegrass
  44. Tufted Lovegrass in zoysia - Arkansas
  45. Tufted Lovegrass - Eragrostis pectinacea
  46. Tufted Lovegrass
  47. Tufted Lovegrass
  48. UGA Turf Weed Science Web Page
  49. UGA Weed Science Web Site



SLIDE CONTENTS
  1. Weed Control in Sod Production Fields Tim R. Murphy The University of Georgia
  2. Weed Problems in Sod Intensive irrigation and fertility effects Effect of herbicides on sod Row crop weeds Common bermudagrass control Row crop vs. turf herbicides Same ai and formulation
  3. Cultural Control Avoid over-irrigation Install drainage if needed Properly mow on schedule Will control most tall-growing broadleaf weeds Maintain pH and fertility Control insects and diseases Know weed spectrum
  4. Hit or Miss Vs. Planned Program
  5. PrePlant Weed Control Essential for common bermudagrass control Will require one fallow season Roundup Pro Still the best herbicide unless fumigation is used Repeat applications will be needed
  6. Roundup Rate and Bermudagrass Control DAT = Days after Treatment
  7. Bermuda Control with Roundup – 1 yr.
  8. Bermudagrass Control with Roundup (averaged across Tifway, Tifgreen, Tifdwarf, Ormond) Applied in late May, late June and Mid-August. Mowed at 1.0 inch. Rated June of year after application
  9. “Newer” Sod Herbicides Envoy - centipedegrass Lontrel Confront Drive Manor, Blade Corsair
  10. “Newer” Sod Herbicides Prompt 5L Label changes for Kerb
  11. Envoy (Valent) SLN Georgia Label Centipede sod farms only Suppresses bermudagrass Controls annual grasses Not for use on seed fields Apply 3 wks after green-up Delay mowing 7 days before and after
  12. Envoy - Bermuda Suppression Two applications at 34.0 fl. oz./acre Four applications at 17.0 fl. oz./acre 1st - 3 to 6 inch bermuda growth 2nd, 3rd, 4th - 3 to 3 inch bermuda growth Also controls most other annual grasses
  13. Envoy Clethodim 0.94 lbs./gal. - EC 17.0 to 34.0 fl. oz./acre Add nonionic surfactant at 0.25% v/v
  14. Bermuda Suppression with Envoy - 1998 Established centipedegrass Natural common bermudagrass infestation Mowing height - 1.0 inch 1st applic. - June 23; 2nd applic. - July 15 Irrigated site Nonionic surfactant (NIS) added to Envoy
  15. Bermudagrass Suppression -1998
  16. Bermudagrass Suppression -1998
  17. Centipede Injury - Envoy - 1998
  18. Sethoxydim (Vantage) - Centipedegrass Controls annual grasses Suppresses bahiagrass and bermudagrass No annual bluegrass control No nutsedge (nutgrass) control
  19. Vantage - Centipedegrass No COC needed Established Seedling - 3 in. stolon growth Delay mowing 7 d before and after application
  20. Vantage – Bahiagrass Suppression 2.25 pts./acre Delay mowing – 7 d before and after application Repeat application - 10 to 14 days Bahia must be actively-growing
  21. Lontrel - DowAgrosciences 3.0 lb./gal. clopyralid Highly active on legumes and aster weeds Also controls curly dock, smartweed Rate 1/4 to 1.0 pt./acre High rate needed for smartweed Will not control dichondra (ponyfoot)
  22. Turfgrass Tolerance to Lontrel
  23. Confront - DowAgrosciences Triclopyr + clopyralid (2.25 + 0.75 lbs./gal.) Amine formulation Active on wide range of broadleaf weeds Clopyralid highly active on asters and legumes Triclopyr controls chickweeds, henbit, mat lippia, lambsquarters, Va. Pepperweed, shepherdspurse
  24. Turfgrass Tolerance to Confront
  25. Confront Use 1.0 to 2.0 pts./acre Use on healthy, well established turf Delay reseeding for 3 weeks Mow seedling turf 2 to 3 times before application Needs 6 hour rain-free period
  26. Drive - TopPro Quinclorac 75 DF Add crop oil concentrate (2.0 pts./acre) Labeled on tall fescue, Ky. Bluegrass, zoysiagrass, bermudagrass DO NOT use on centipedegrass or St. Augustinegrass
  27. Drive - TopPro May be used before or after sprigging zoysiagrass Controls crabgrass (except smooth), white clover, hop clovers, speedwell, dollarweed Torpedograss - requires 2 to 3 applications Will not control goosegrass Use with extreme caution near tomatoes, bell peppers, etc.
  28. 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 only 0.25 to 0.5 oz/acre on centipede Use with nonionic surfactant
  29. Corsair - Riverdale Chlorsulfuron 75% Used primarily for spot control of clumpy tall fescue in bermuda, zoysia, centipede, St. Augustine, Ky. Bluegrass – works slowly Avoid transition applications on centipede, zoysia, St. Augustine Repeat application in 60 d Add NIS at ¼ to 1/3 fl. oz./gallon of spray mix
  30. Prompt - TopPro Pre-mix of bentazon+atrazine (2.5 lbs./gal. each) Labeled for bermuda, centipede, St. Augustine, zoysia (some injury to bermuda) Good option for yellow nutsedge, kyllinga, globe sedge, and numerous broadleaf weeds May be used 10 d after sprigging 2.4 pts./acre, repeat 7 to 10 d later for sedges
  31. Kerb – Rohm & Haas Label expanded to include centipede, St. Augustine and zoysia Perennial ryegrass removal – apply at 50% green-up growth stage Poa annua control during winter months Needs rainfall or irrigation event (0.25 in.) within 24 to 48 hrs
  32. TURFGRASS TOLERANCE TO HERBICIDES HERBICIDE CENTIPEDE BERMUDA ATRAZINE T D BENTAZON T T BENTAZON + ATRAZINE T S-I MSMA/DSMA S T SETHOXYDIM T S
  33. TURFGRASS TOLERANCE TO HERBICIDES HERBICIDE CENTIPEDE BERMUDA 2,4-D I-T T MCPP T T DICAMBA I-T T 2,4-D+MCPP +DICAMBA S-I I-T MCPP+2,4-D +DICAMBA I-T T
  34. TURFGRASS TOLERANCE TO HERBICIDES HERBICIDE CENTIPEDE BERMUDA IMAZAQUIN T T HALOSULFURON T T TRICLOPYR + CLOPYRALID T I METRIBUZIN NR T SETHOXYDIM T S
  35. At-Sprigging Options Ronstar 2G - bermuda, zoysia, paspalum Ronstar 50WSP - bermuda Atrazine - centipede, St. Augustine, zoysia Simazine - centipede, St. Augustine, zoysia
  36. Ronstar 2G and 50WSP - At Sprigging 2G - 100 to 150 lbs./acre 50WSP - 4.0 to 6.0 lbs./acre Apply immediately before or after sprigging Pre-sprigging (1 day before sprigging slightly safer than post-sprigging) Irrigate ASAP for best results
  37. Atrazine and Simazine - At Sprigging Centipede, St. Augustine, zoysia Atrazine - labeled up to April 15 Simazine - labeled up to June 1 Do not apply within 30 days before lifting Apply 2 days after lifting sod on old beds - FL Apply 7 to 10 days after sprigging - FL
  38. TOLERANCE OF NEWLY-SPRIGGED CENTIPEDEGRASS TO ATRAZINE AND SIMAZINE
  39. The majority of herbicides used in turfgrasses for preemergence annual grass control are dinitroanilines and dithiopyr DNA’s Barricade Pendulum Surflan Balan Treflan Dimension Best used on established turf. Mitotic inhibitors. Relatively immobile in the soil Minimal use in sod fields
  40. DNA and Dimension root inhibition pendimethalin on zoysiagrass Dimension on bermudagrass Surflan on St. Augustinegrass Swollen, club shaped roots
  41. Sedge Herbicides - Turfgrasses Basagran T/O - yellow, annual sedges Manage - yellow, purple, annual sedges MSMA/DSMA - yellow, purple, annual sedges Image - yellow, purple, annual sedges Pennant - yellow, annual sedges 2,4-D - yellow, very poor activity
  42. Tufted lovegrass
  43. Tufted lovegrass in zoysia - Arkansas
  44. Tufted Lovegrass – Eragrostis pectinacea Summer annual – reproduces by seed Difficult to control Ineffective herbicides MSMA Illoxan Princep Fusilade T/O Drive Kerb Asulox Pennant
  45. Tufted Lovegrass Herbicide Options Atrazine, 1.5 lbs. ai/acre Pre (April) fb 6 wks later - > 95% Oxadiazon, 2.0 lbs. ai/acre Pre (April) fb 10 wks later - > 65% Acclaim Extra , 32 fl. oz./acre Late June – 90% control
  46. Tufted Lovegrass Herbicide Options Vantage, 1.0 pt./acre Late May - > 90% control Envoy, 1.0 pt./acre Late May - > 90% control Roundup Pro, 10.0 fl. oz./acre Early July – 100% control
  47. UGA Turf Weed Science Web Page www.georgiaturf.com 193 weed species 30 popular articles UGA turf weed science recommendations links to herbicide labels, MSDS
  48. UGA Weed Science Web Site www.gaweed.com Covers all crops including turf and ornamentals Weed Identification Currently has over 40 PowerPoint slide sets that can be downloaded PLEASE USE IT!!!!!!!!!!!!!!!!