Featured Article | GreenCast | Syngenta

Reclaim your course from tough weeds

By Lane Tredway, technical services manager, Syngenta

Controlling grassy weeds is difficult, especially if preemergent herbicides weren’t applied or fail to provide acceptable control. Very few options are available for post-emergent control of grassy weeds in certain warm-season grasses like bermudagrass and zoyisagrass turf. Without viable options for control, many turf areas have been taken over by undesirable weeds.

Manuscript® herbicide is a powerful option for controlling tropical signalgrass, crabgrasses, dallisgrass and other weeds in bermudagrass and zoysiagrass turf. Its active ingredient pinoxaden works through the ACCase mode of action, which has a unique control spectrum thanks to its phenylpyrazoline chemistry. The Manuscript formulation also includes a safener to further enhance turf safety, enabling applications near ornamental beds and shrubs. Manuscript is also packaged with Adigor™ surfactant, which was specifically designed to maximize Manuscript absorption and translocation in target weeds.

Manuscript at a glance

Turf species
  • Bermudagrass
  • Zoysiagrass
  • St. Augustinegrass (sod only)
Target weeds
  • Bull/thin paspalum
  • Tropical signalgrass
  • Tropical carpetgrass
  • Crabgrass (large and smooth)
  • Bahiagrass
  • Dallisgrass
  • Suppression of torpedograss and seashore paspalum
Use sites All turf sites except putting greens
Recommended uses
  • Two applications on a 14- to 21-day interval
  • 28-day interval for St. Augustinegrass
  • On bermudagrass and zoysiagrass, make a sequential application of Monument® 75 WG herbicide to control sedges, prostrate spurge and other secondary weeds

Two spot-treatment applications at 9.6 fl. oz./10,000 ft.2 on a 14- to 21-day interval provide consistent control of mature weeds — even in the summer, when other chemistries often struggle. For best results, Manuscript should be applied in 40 gallons of water per acre with 0.5% v/v of Adigor. Target weeds should be actively growing – in other words, not under stress from drought or other factors – to maximize absorption and translocation of the active ingredient.

Watch the following video from GCSAA TV about the efficacy of Manuscript:

Golf course superintendents using Manuscript have successfully reclaimed bermudagrass areas that had become completely overtaken by tropical signalgrass. Since Manuscript provides effective control in the summer, when bermudagrass is growing most aggressively, superintendents can use fertility and cultural practices to encourage bermudagrass growth back into the voids where weeds were established.

Manuscript vs. untreated grass
Manuscript was mixed with MSO at 0.5% v/v and applied twice on a 14-day interval. Source: Granada Golf Course, Coral Gables, Florida, 2014.

Manuscript does not control goosegrass, so the triple threat combination of Tenacity®, Princep® Liquid and Pennant Magnum® herbicides are recommended as part of a comprehensive weed control program.

When controlling tropical signalgrass or goosegrass, sedges and broadleaf weeds can often move in quickly and compete against desirable turf. Monument 75 WG herbicide is a great choice for follow-up applications, and has been shown to further enhance bermudagrass or zoysiagrass regrowth by eliminating these sources of competition.

For more information and trial data, visit GreenCastOnline.com/Manuscript.

Performance assessments are based upon results or analysis of public information, field observations and/or internal Syngenta evaluations. Trial reflects treatment rates commonly recommended in the marketplace.

©2019 Syngenta. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties and/or may have state-specific use requirements. Please check with your local extension service to ensure registration and proper use. Adigor™, GreenCast®, Manuscript®, Monument®, Pennant Magnum®, Princep®, Tenacity® and the Syngenta logo are trademarks of a Syngenta Group Company. All other trademarks are property of their respective owners.