Tough Weeds in Warm-season Lawns and Golf Turf

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Summer weed control in warm-season turf is difficult. Grassy and broadleaf weeds with differing lifecycles and susceptibility to herbicides can be present in warm-season turf. High temperatures and marginal drought stress can increase the chances of phytotoxicity of applied herbicides making summertime weed control complex.

  • Cultural control – maintaining a dense turf is critical for limiting weeds. If a site has constant problems with weeds or any other category of pest, evaluate the growing conditions for soil fertility, compaction, thatch, shade, drainage, etc., and mitigate as needed
  • Controlling sedgessedges in warm-season turf are highly variable, from perennial yellow and purple nutsedge to annual and perennial kylllinga’s
    • Envu’s newest herbicide Celsius® XTRA provides excellent control of sedges, plus all the other weeds that Celsius WG controls
    • Recent research from the University of Nebraska suggests earlier applications control sedges far more effectively than previously thought
    • Combine Celsius XTRA with Specticle® FLO to extend control of annual sedges
    • Tribute® Total also provides postemergence (POST) control of many annual and perennial sedges, many grassy weeds and broadleaf weeds
  • Broadleaf weed control optionsdoveweed, dollarweed, Virginia buttonweed and many other summer weeds can be difficult to control and will likely require repeat applications
  • Goosegrass, bull paspalum, dallisgrass, and other grasses
    • PRE application(s) of Ronstar® and/or Specticle FLO should control annual grasses but will have limited effect on perennial grassy weeds
    • Revolver®, Sencor®, Tribute Total, and Celsius WG are labeled for some use on grassy weeds, depending on the weed and turf species
    • POST goosegrass control with Tribute Total can vary greatly under different soil moisture levels. Research at University of Tennessee reported <25% goosegrass control under dry conditions (<12% VWC), while >80% goosegrass control occurred when soil remained moist (>20%). Drought conditions will also affect control from other postemergence herbicides on various weeds
  • Options of for St. Augustine lawns
    • Read all label precautions since St. Augustine can be susceptible to herbicide damage
    • Specticle is highly effective as a PRE and should be combined with POST for most effective long-term control
    • Celsius WG controls more than 125 broadleaf and grassy weeds in St. Augustinegrass lawns, eliminating the need for tank-mixing multiple herbicides
    • Celsius XTRA controls the same grassy and broadleaf weeds as Celsius WG plus nutsedges, Kyllingas and annual sedges with a single herbicide
  • Pay special attention to label precautions – effective summer weed control is difficult and comes with some risk of injury to turf, so read and follow all label instructions
  • Need more info? – Read and follow all label directions and contact your Envu area sales manager for assistance

Product

Revolver®

Tribute® Total

Celsius® WG

Celsius XTRA

Active Ingredients

Foramsulfuron

Thiencarbazone + Foramsulfuron +

Halosulfuron

Thiencarbazone + Iodosulfuron + Dicamba

Thiencarbazone + Iodosulfuron + Halosulfuron

Primary Target

Grasses

Difficult Grasses

Broadleaf Weeds

Broadleaf Weeds + Sedges

Secondary Target

Broadleaf Weeds

Sedges

Some Grasses

Some Grasses

Turf Species

Bermudagrass

Zoysiagrass

(including greens)

Bermudagrass

Zoysiagrass

St. Augustinegrass

Centipedegrass

Bermudagrass

Zoysiagrass

St. Augustinegrass

Centipedegrass

Bermudagrass

Zoysiagrass

pdf icon Lawn solution sheet - Dallisgrass - warm season
pdf icon Lawn solution sheet - Dollarweed - warm season
pdf icon Lawn solution sheet - Doveweed- warm season
pdf icon Lawn solution sheet - Sedge - warm season

Dollarweed in St. Augustine

Dollarweed in St. Augustine (Envu)

doveweed

Doveweed. (Envu)