How SedgeHammer Herbicide Works

SedgeHammer is a water-soluble granule formulation that is mixed with water and applied to target plants with a sprayer. SedgeHammer is a member of the sulfonylurea family, an ALS (acetolactate) enzyme inhibiting herbicide. The active ingredient is absorbed into leaf tissue as quickly as 24 to 48 hours after application, then translocated through the plant’s vascular system. The herbicide quickly inhibits amino acids, halting cell division and plant growth in both roots and shoots, causing eventual death in target plants.

A nonionic surfactant is an additive that aids the penetration of SedgeHammer into the plant tissue. Surfactants are not only used in horticulture but are commonly used in many cleaning products. Their properties enable the herbicide to “sheet” or spread across the surface of a plant or weed. It is always recommended that a surfactant be used to help SedgeHammer penetrate the waxy layer of the nutsedge leaf. The surfactant also aids in dispersing the water droplets evenly across the leaf tissues and facilitates adsorption into the vascular system of the plant.

SedgeHammer Target Weeds

Purple Nutsedge, Yellow Nutsedge, Kyllinga

WEEDS CONTROLLED WITH SEDGEHAMMER: Purple Nutsedge, Yellow Nutsedge, Green Kyllinga, Annual Kyllinga, Cocklebur, common Sunflower, common Ragweed, giant Ragweed, Pigweed, Velvetleaf, Horsetail

Target Uses of SedgeHammer

SedgeHammer Herbicide is a selective, post-emergent herbicide concentrate designed specifically to kill nutsedge and other broadleaf weeds without injury to turfgrasses, established ornamentals, shrubs, or trees. SedgeHammer can be used in both warm-season and cool-season turfgrasses, landscaped areas, and other non-crop areas.

SedgeHammer will not prevent germination of most labeled target weeds. Rather, it should be applied to actively growing weeds. If turfgrass or nutsedge is under stress, poor control may result. Also, desirable turfgrass, ornamentals, and trees should be well established before application. Do not apply to edible plants or gardens.

*Note that weeds can develop resistance to herbicides. To minimize the potential for resistance development and/or to control resistant weed biotypes, use a variety of cultural, mechanical, and chemical weed control tactics. Rotate with herbicides having other modes of action.

ACTIVE INGREDIENT: 1.33 oz. bottle - Halosulfuron-methyl 75%

SedgeHammer Application Instructions

SedgeHammer is a powder concentrate to be diluted with water and applied with a pump sprayer. SedgeHammer should not be applied with hose-end sprayers since they are far less accurate than hand pump sprayers. When applying, spray the weeds thoroughly and wet the entire leaf surface of the undesirable plants. For best results, spray nutsedge after it has reached the 3 to 8 leaf stage of growth.

SedgeHammer often works with one application, but depending on the size and age of the nutsedge a second treatment may be required 6 to 10 weeks after the initial treatment. See “Other Tips” below for more information.

Mixing Instructions, 1.33 oz container:

Using included spoon, measure .9 grams (one spoonful) and pour into 1 gallon of water. Measure level scoops only (not rounded).

*Swirl or mix the solution thoroughly.  The 0.9 grams will cover 1000 sq. ft. One full bottle (1.33 oz.) makes approx. 40 gallons of finished solution.
*Add 2 teaspoons of a nonionic surfactant (spreader sticker) and swirl gently until mixed.

For best results, add a surfactant that is specifically made for horticultural purposes and labeled for use with an herbicide. Use only surfactants that contain at least 80 percent active material. Do not exceed the recommended amount of surfactant due to potential turf injury at higher rates.

*While spraying, periodically swirl or shake the mixture to keep the product evenly distributed in the water.
*Do not store the mixed solution as it will degrade and become ineffective.

Each 1.33 oz. bottle makes 40 gallons of finished solution. Each gallon of finished solution covers approximately 1,000 square feet. In high volume broadcast applications, each 1.33 oz. bottle covers 1-2 acres.

Standard Application Dilution rates / Mixing Ratios for SedgeHammer:
*1.33 oz. bottle – Use 0.9 g (one spoonful) in 1-2 gallons of water with 2 teaspoons of a nonionic surfactant. 

Broadcast applications (1.33 oz. bottle only):

*2/3 oz. in sufficient water for uniform application per acre – light infestations
*1 1/3 oz. in sufficient water for uniform application per acre – heavy infestations
*Do not exceed 4 applications per acre per season. Do not exceed 1 quart of surfactant per acre. Mix only what is needed at the time of application. Do not store unused solution.

SedgeHammer is for use in the following areas:

Commercial and residential turf and other non-crop sites including: airports, cemeteries, fallow areas, golf courses, landscaped areas, public recreation areas, residential property, roadsides, school grounds, sports fields, landscaped areas with established woody ornamentals, fairgrounds, race tracks, tennis courts, campgrounds, and rights-of-way

Tolerant Turfgrasses – Cool-Season: creeping Bentgrass, Kentucky Bluegrass, fine Fescue, tall Fescue, perennial Ryegrass; Warm-Season: Bahiagrass, Bermudagrass, Buffalograss (Sedgehammer+ only), Centipedegrass, Seashore pasapalum, St. Augustinegrass, Kikuyugrass, Zoysiagrass

Indoors

SedgeHammer is not labeled for indoor use of any kind.

Outdoors

See general mixing instructions, mixing rates, and application details above.

Established woody ornamentals in landscaped areas – Apply as a post-directed spray. Avoid contact of this product to leaves of desirable plants since foliar injury, discoloration or death may result.

SedgeHammer Features

• May be tank mixed with Glyphosate herbicides in areas such as rights-of-way or fallow land.
• Scoop included with 1.33 oz. bottle.
• Superior control of yellow and purple nutsedge.
• People and pets may return to treatment area once spray is dry.
• Labeled for use in a variety of warm and cool weather turfgrasses.

Extra Tips for Using SedgeHammer

• For best results, do not mow turf for 2 days before or 2 days after application.
• SedgeHammer is effective if no rainfall occurs within 3 hours, but best results are obtained with no rainfall or irrigation for at least 4 hours.
• Use only in established turfgrass: allow turf to develop a good root system and uniform stand before application.
• Results may take 5-7 days to begin to appear.
• Do not apply when turfgrass or nutsedge is under stress.
• Do not apply when temperatures exceed 85 degrees F.
• Do not apply to golf course putting greens.
• For transplanted woody ornamentals, allow 3 months after transplanting before applying this product.
• When using in fallow areas, allow 4 weeks between application and transplanting of woody ornamentals or seeding or sodding of turfgrass.
• SedgeHammer may remain active in the soil up to 3 years after application.
• Store concentrate under cool, dry conditions.

Compare to: ProSedge Herbicide