EPA approves Vexis® Herbicide Granular for sedge, kyllinga control

October 16, 2019 -  By

Managing herbicide-resistant weeds while controlling tough sedges and kyllingas just got easier: The U.S. EPA has approved Vexis® Herbicide Granular from PBI-Gordon.

Vexis is a selective, post-emergent herbicide that provides excellent control of:

Sedges, Kyllingas, and Rushes:

  • Yellow nutsedge
  • Purple nutsedge
  • Annual sedges (including ALS-resistant sedges)
  • Cockscomb kyllinga
  • Green kyllinga
  • False green kyllinga
  • Path rush

Broadleaf Weeds:

  • Buckhorn plantain
  • Common chickweed
  • Dollarweed (pennywort)
  • False dandelion
  • Florida betony
  • Ground ivy
  • Hairy bittercress
  • Henbit
  • Virginia buttonweed

Vexis gives turf professionals an important new tool in managing herbicide resistance. Vexis contains a proprietary new active ingredient, pyrimisulfan, which is in the sulfonanilide chemical class. It is in the Weed Science Society of America’s Group 2 and the Herbicide Resistance Action Committee B class acetolactate synthase (ALS) inhibitors. For example, although Vexis is an ALS-inhibitor, it has exhibited activity against weeds that have developed resistance to other ALS-inhibiting herbicides such as sulfonylureas.

Yellow Nutsedge Trial

Yellow nutsedge testing at Virginia Tech. Photo: PBI Gordon Graphic: PBI Gordon

Photo and data courtesy of Virginia Tech Golf Course, 2015. (Click image to enlarge.)

False Green Kyllinga Trial

False green kyllinga. Photo: Rutgers Univerity. Graphic: PBI-Gordon

Photo and data courtesy of Rutgers University, 2018. (Click image to enlarge.)

Vexis is labeled for use on:

Warm-Season Turfgrasses:

  • Bermudagrass (common or hybrid)
  • Bahiagrass
  • Buffalograss
  • Centipedegrass
  • Kikuyugrass
  • Seashore paspalum
  • St. Augustinegrass (including improved varieties, such as floratam and bitterblue)
  • Zoysiagrass

Cool-Season Turfgrasses:

  • Bentgrass (mowed over ½ inch)
  • Fine and tall fescues
  • Kentucky bluegrass
  • Perennial ryegrass

Application Sites:

  • Golf course tees, fairways, and roughs
  • Residential turf
  • Commercial
  • Parks
  • Schools
  • Cemeteries
  • Sports facilities
  • Athletic fields
  • Sod farms

Vexis is a low-rate, non-phenoxy, granular product that will be sold in a 2 lb. shaker can or in a 15 lb. bag. It can be applied to either wet or dry turf. The product’s application rate is 2.5 – 5.5 lb. per 1,000 sq. ft. (100 – 240 lb. per acre). Retreatment after 30 days is allowed, up to 8.26 lb. per 1,000 sq. ft. per year (360 lb. per acre). The maximum annual use rate is 8.26 lb. per 1,000 sq. ft. (360 lb. per acre).


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