1 / 37

Weed Management on Athletic Fields

Weed Management on Athletic Fields. Tim R. Murphy Crop and Soil Sciences The University of Georgia. Athletic Field - Agronomic Problems. Excessive wear and damage Lack of recovery time Compaction Poor drainage. Athletic Fields - People Problems.

cedric-valenzuela
Download Presentation

Weed Management on Athletic Fields

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Weed Management on Athletic Fields Tim R. Murphy Crop and Soil Sciences The University of Georgia

  2. Athletic Field - Agronomic Problems • Excessive wear and damage • Lack of recovery time • Compaction • Poor drainage

  3. Athletic Fields - People Problems • Lack of equipment, personnel, chemicals, irrigation (MONEY) • Poor maintenance practices • Untrained maintenance personnel • Constant use schedules • Low budgets - high expectations

  4. Hit or Miss Or A Planned Program

  5. 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

  6. Georgia Posting Rule • Chapter 40-21-5 • Administered by Georgia Department of Agriculture • 24 hour re-entry restriction for all pesticides • Contact Georgia Department of Agriculture for additional information

  7. Bermudagrass Athletic Fields

  8. Bermudagrass Athletic Fields

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

  10. Bermudagrass - Summer • Use MSMA for postemergence control of weedy grasses • 2 appl. for crabgrass, 7 to 10 day interval • 3 appl. for dallisgrass and bahiagrass, 5 day interval • Will help on nutsedge control

  11. Non-overseeded Bermudagrass - Winter • Simazine or atrazine • Apply 1.0 lb. ai/acre in November • Repeat in January if necessary • Will control annual bluegrass, common chickweed, lawn burweed, henbit, etc. • Poor control of wild garlic/onion and perennial broadleaf weeds

  12. Summer or Winter • Use 2,4-D alone or in 2-way or 3-way herbicides for wild/garlic onion and broadleaf weed control. • Can be used on overseeded fields after 3 to 4 mowings on perennial ryegrass • Tank-mix in summer with MSMA (do compatibility test) (Quadmec, Trimec Plus) • Avoid green-up and hot summer day applications

  13. Athletic Fields - Preemergence Herbicides • Be careful on severely damaged fields • Most PRE herbicides affect root development from stolon nodes • Select oxadiazon products • Does not affect root development from stolon nodes • On non-damaged healthy fields numerous herbicides may be used

  14. Dinitroanilines • Benefin - Balan • Oryzalin - Surflan • Pendimethalin - Pendulum • Prodiamine - Barricade • Trifluralin – an a.i. in Team • Used on most cool- and warm-season turfgrasses • Shoot and root absorbed, no translocation • Inhibit cell division

  15. Dithiopyr • Dimension • MOA is similar to dinitroanilines • Shoot and root absorbed, no translocation • Inhibit cell division (tubulin formation)

  16. DNA Root inhibition Dimension on bermudagrass Surflan on St. Augustinegrass pendimethalin on zoysiagrass Swollen, club shaped roots prevent “rooting down”

  17. More Practical Tips • Observe posting regulation • Water-in (0.5 inch) all preemergence herbicides • Make applications on off-days, or off-times • Use a 20 to 40 gpa spray volume • Avoid post-herbicide use at air temperatures > 90 F. and during spring transition

  18. Problem Athletic Field Weeds • Annual Bluegrass • Goosegrass, Crabgrass • Dallisgrass • Sedge(s)

  19. Annual Bluegrass • Fall preemergence • late-Nov. - atrazine, simazine • mid-Jan. - atrazine, simazine, Sencor, Kerb • Dormant period - Roundup Pro, Finale

  20. Non-Overseeded Bermudagrass • Numerous PRE and POST options for annual bluegrass • Triazines – standard, but resistance increasing • Kerb – works, costly, lateral run-off • Pre’s – work, but DNA resistance is here • Glyphosate – works, partial dormancy • Diquat – ineffective

  21. Crabgrass • Mid-Feb. - March - apply Pre • repeat 8 wks later if 1/2 rate is used • Summer - MSMA • repeat 2x, 7 day interval, will not control goosegrass • Summer - Drive • one application, apply to seedling or big crabgrass, control of 1 to 4 tiller crabgrass is not consistent, will not control goosegrass

  22. Goosegrass • Mid-Feb. - March - apply Pre • repeat 8 wks later if 1/2 rate is used • Summer - MSMA + Sencor • repeat 2x, 7 day interval, controls crabgrass • Summer - Sencor • repeat in 7 d, fair control crabgrass, more injury than MSMA alone

  23. 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 • Monument - yellow, purple, annual sedges • Pennant - yellow, annual sedges

  24. Green (perennial) kyllinga

  25. Kyllinga spp. (Kyllinga spp.) • Sedge family • Annuals and perennials • Reproduce by seed and rhizomes • No tuber formation • Thrive in wet soils • Increasing in severity • Lack of MSMA use??

  26. Kyllinga spp. - Control • Image • Image + MSMA • Manage • Monument • Continued applications of MSMA/DSMA • Repeat applications will be needed

  27. MSMA, DSMA, CMA • Organic arsenicals • Post only, no soil activity • Crabgrass, other annual grasses • Weak on goosegrass • Nutsedge • Dallisgrass - tough to control

  28. Dallisgrass Control with MSMA • Apply during good growing conditions • 2 to 3 applications • 5 to 7 days apart • Stay on schedule!!! • Avoid temperatures over 900 F. • Need 24 hour rainfree period

  29. Dallisgrass Control with MSMA • 1976 - late July • 1977 - August 1 • 7 day intervals

  30. Overseeded Bermudagrass • It sure is pretty but……. • Cost and difficulty of controlling annual bluegrass increases • Perennial ryegrass becomes a weed during transition • Usually chemical removal is required • Broadleaf and wild garlic control • No problem • Delay application until after 2 to 4 mowings

  31. Overseeded Bermudagrass • Options for annual bluegrass • Kerb - 60 to 90 days (or charcoal) • Dimension – 8 wks • Barricade – 8 wks, not recommended on label • Balan – low rate, 6 weeks • Rubigan – cost limits use to greens • Prograss – greenup issue • TranXit and Revolver – 2 weeks before seeding

  32. Bermudagrass Transition Issues • Heat tolerance of ryegrass • Renegade ryegrass • Poa trivialis liveslonger than expected • Competition to bermudagrass • Long-term effects on bermudagrass • When do you accelerate transition?

  33. Bermudagrass Growth • When do you accelerate transition? • Minimal root growth < 50 F. soil temp. • Optimum root growth 75-85 F. soil temp. • Shoot growth ceases < 55 F. air temp. • Optimum shoot growth 80-95 F. • Need night air temps. of mid-60s F.

  34. Accelerating Transition • Delay application until bermudagrass is in active spring growth. • Know 30 day forecast • No green-brown-green!! (on most sites) • Need green-green

  35. Slow – 4 to 6 wks Kerb Embark (repeats) Cultural techniques Fast – 10 to 30 days Katana TranXit Manor Revolver Momentum Battalion Bermudagrass Transition Options

  36. Health and vigor of bermudagrass is exceedingly important to a smooth transition.

  37. Questions ????????

More Related