Late summer is Time for Controlling Dallisgrass

Dallisgrass (Paspalum dilatatum) is a difficult-to-control, rhizomatous, perennial grassy weed commonly found in warm-season golf course turf and lawns.

  • What to look for:
    • Coarse-textured, clump forming grass
    • Leaves ¼ to ½ inch wide
    • Distinctive greyish-green color
    • Can be found throughout the south and well north into the transition zone
  • Tough to control:
    • Dallisgrass spreads via short, thick rhizomes, and to a lesser extent by seed
    • A perennial regrowing from crowns and short rhizomes, so preemergence herbicides won’t work
    • Most POST herbicides don’t translocate effectively through rhizomes
    • Most POST herbicides can damage desired turf at rates and number of applications required to control Dallisgrass
  • Tribute Total®is highly effective on Dallisgrass:
    • Safe for use in bermudagrass and zoysia
    • Initial application should be made in in late summer/early fall when the dallisgrass is actively growing and not under drought stress
    • For most successful control make a second application 4-6 weeks later when the dallisgrass begins to recover
    • A third application may be needed in the spring if regrowth
    • Combine with two spray adjuvants to maximize control:
      • Ammonium Sulfate (spray grade) at 1.5 – 3.0 lbs/A
      • Methylated Seed Oil (MSO) – (containing at least 80% MSO) – 0.5-1.0% volume:volume of spray mixture
  • Need more info? – Read and follow all label directions, see the attached information and contact your Bayer Area Sales Manager if you need assistance

 

Dallisgrass

Dallisgrass in low-cut bermudagrass (Bayer)

 

Dallisgrass in bermudagrass controlled by Tribute Total

Dallisgrass in bermudagrass controlled by Tribute Total (Bayer) )

 

  Dallisgrass solution sheet
Laurence Mudge

by Laurence Mudge , Green Solutions Team Manager

Friday, July 24, 2020