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Expert Tips for Weed Management on Putting Greens

Discover effective strategies for managing weeds on putting greens, including preemergence and postemergence control methods for common culprits like annual bluegrass, goosegrass, crabgrass, and broadleaf weeds. Learn about herbicides and best practices to protect your greens.

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Expert Tips for Weed Management on Putting Greens

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  1. Weed Management on Putting Greens Dr. Tim R. Murphy Extension Weed Specialist University of Georgia Griffin

  2. Problem Putting Green Weeds • Annual Bluegrass - annual and perennial • Goosegrass • Crabgrass • occasional broadleaf weeds • nutsedge(s)

  3. Bermudagrass Greens • Preemergence crabgrass and goosegrass • Bensulide (Bensumec, Pre-San, Betasan • Dithiopyr (Dimension) • Bensulide + oxadiazon (Scotts Goosegrass/Crabgrass Control)

  4. Bermudagrass Greens • Postemergence crabgrass and goosegrass • Diclofop (Illoxan), goosegrass only • MSMA/DSMA - low rates, repeat applications, very risky, avoid air temperatures > 85 F.

  5. Bermudagrass Greens • Preemergence annual bluegrass control • Pronamide (Kerb) , apply 60 to 90 days before overseeding, activated charcoal is used when applications made < 90 days before overseeding • Fenarimol (Rubigan), apply 2 to 3 applications, last application 14 days before overseeding perennial ryegrass (30 days on P. trivialis), apply low rate in Jan.-Feb, for extended control

  6. Creeping Bentgrass Greens • Preemergence crabgrass and goosegrass • Bensulide (Bensumec, Pre-San, Betasan • Dithiopyr (Dimension) • Bensulide + oxadiazon (Scotts Goosegrass/Crabgrass Control)

  7. Creeping Bentgrass Greens • Postemergence crabgrass and goosegrass • No herbicides labeled for this use • Low tolerance of creeping bentgrass • MSMA/DSMA - very risky • Acclaim Extra - too injurious

  8. Creeping Bentgrass Greens • Annual bluegrass control • Paclobutrazol (Scotts TGR, Trimmit) • a plant growth regulator that inhibits gibberellin biosynthesis • Poa more sensitive than bentgrass • apply in spring after bentgrass growth has resumed • works slowly, repeat applications needed • fall + spring applications needed for P. annua var. reptans

  9. Perennial Poa Treatments (Johnson and Murphy, 1995) • TGR applied Oct. 1 + Nov 12 fb Mar 15 + May 1 for 2 yr suppressed Poa 28% 4 MAT • TGR at 0.5 + 0.25 fb 0.5 + 0.25 lbs. Ai/acre • Cutless at same dates and rates suppressed Poa 6% 4 MAT

  10. Perennial Poa Treatments (Johnson and Murphy, 1996)

  11. Perennial Poa Suppression

  12. Maximum Bentgrass Injury

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