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SYNGENTA

Reward Herbicide

Reward Herbicide is a fast-acting and broad-spectrum landscape and aquatic herbicide that controls nuisance submerged, emergent, and floating weeds as well as weeds along the edge of sensitive water bodies.

As low as $124.99
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Reward Landscape Aquatic Herbicide product page
Min : 124.99 - Max : 277.25
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Price as of
12/13/25
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Reward Herbicide, manufactured by Syngenta, is a professional non-selective herbicide that kills unwanted land and aquatic weeds and algae without toxicity to the environment or aquatic life.

While systemic herbicides are slowed by cold weather, Reward Herbicide will remain effective. If you are looking for fast aquatic weed control that's easy on the surroundings and protects and beautifies your water body, this product is the way to go.

Reward Herbicide delivers complete elimination against a broad spectrum of weeds, including poa annua, chickweed, and more. It has minimum application rates for more affordable and effortless control. Even during cold winter, the visible burndown from this product is apparent in a matter of days.

Tools Needed

You will need a handheld pump sprayer, backpack sprayer, or professional skid sprayer. 

How to Use

Applying Reward Herbicide

  • Step 1: Determine how much Reward Herbicide to use by measuring the square footage of the treatment area. To do this, measure the treatment areas' length and width in feet, then multiply them together for land applications (length X width = square footage). For aquatic applications, you will need to calculate the surface area by measuring the length, width, and volume of your water body, then multiplying them together (length X width X depth = water volume). For pump sprayer or backpack sprayer spot applications on landscapes, use 0.75 oz of Reward Herbicide with a nonionic surfactant in 1 gallon of water to cover 1,000 sq. ft. For aquatic spot treatment sprays with a skid sprayer, use 2 quarts of product plus a non-ionic surfactant per 100 gallons of water. Apply at a rate of 1 gallon per surface acre at a depth of 4 feet.
  • Step 2: For pump sprayer or backpack sprayer applications, add one-third to one-fourth of the water to the spray tank first, then add the correct amount of Reward Herbicide. When applying Reward Herbicide, always mix it with an approved surfactant such as Alligare 90 at a rate of 0.33 oz. per finished gallon. Add the rest of the water to the sprayer and mix well.
  • Step 3: Using a fan spray nozzle, apply the Reward Herbicide to the target areas until completely wet, but do not spray to the point of runoff. Additional applications may be needed if treating densely packed weeds or mats. If needed, make another application within 2 weeks. 

Where to Use

Spraying pond weeds with Reward Herbicide

Reward Herbicide can be used on land or in various aquatic areas. On land, it can be applied along roadsides, fence lines, parks, golf courses, farmyards, storage areas, and dry non-flooding areas. Approved aquatic areas are ponds, drainage ditches, canals, streams, rivers, and other still or slow-moving bodies of water.

When to Use

Apply on actively growing weeds when water temperatures have reached or exceeded approximately 50 degrees Fahrenheit, typically during the spring or early summer.

Safety Information

Reward Herbicide is safe to use around pets, livestock animals, and children when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and using this product.

Do not graze livestock on treated turf or feed treated thatch to livestock.

Do not allow people or pets to enter treated areas until 24 hours have passed after application. 

Special Considerations

Visual results from Reward Herbicide may occur in a few hours under optimal conditions or take a couple of days under cloudy, overcast conditions.

More Information
Restricted Use No
Shipping Restrictions CT, NY
Availability Online
Signal Word CAUTION
Keith's Pro Tip "Reward Herbicide is a non-selective herbicide and will kill most vegetation types it comes in contact with. To protect wanted vegetation, do not make applications during windy weather and adjust the spray nozzle for a stream spray for a more concentrated application."
Target Pests Multi Annual Bluegrass, Brome, Buttercup, Carolina Geranium, Cattail, Henbit, Little Barley, Pennywort, Rescuegrass, Six Weeks Fescue, Algae, Bladderwort, Brazilian Elodea, Coontail, Duckweed, Elodea, Frogs Bit, Hydrilla, Naiad, Pondweed, Salvinia, Water Hyacinth, Water Lettuce, Watermilfoils
Time to Kill Reward Landscape & Aquatic Herbicide begins killing weeds within minutes after application but can take up to several weeks to get complete control depending on the target weed.
Chemical Type Herbicide
Formulation Emulsifiable Concentrate (EC)
Application Methods Broadcast Spray, Spot Treatment
Product Drawbacks Reward Herbicide requires mixing with a non-ionic surfactant for best results.
Active Ingredient Diquat dibromide 37.3%
Application Equipment Backpack Sprayer, Pump Sprayer, Spray Rig
Mix Rate For landscape spot treatments, use 0.75 oz of Reward Herbicide with a nonionic surfactant in 1 gallon of water. For spot treatments of aquatic weeds, mix 2 quarts of Reward plus a non-ionic surfactant per 100 gallons of water.
Use Sites Outdoors
Yield Coverage area of Reward Landscape & Aquatic Herbicide will vary depending on the application at a maximum of 1 gallon per acre.
EPA Registration No. 100-1091
Shelf Life Reward Herbicide will last 3 to 5 years in storage when stored in a cool dry place.
Comparable Products Diquat Dibromide Herbicide
Children or pets? Yes
Property Characteristics None
AvailabilityOnline
Restricted UseNo
BrandSYNGENTA
Keith's Pro Tips"Reward Herbicide is a non-selective herbicide and will kill most vegetation types it comes in contact with. To protect wanted vegetation, do not make applications during windy weather and adjust the spray nozzle for a stream spray for a more concentrated application."
Product DrawbacksReward Herbicide requires mixing with a non-ionic surfactant for best results.
Target PestsReward Landscape & Aquatic Herbicide can control Algae, Bladderwort, Brazilian Elodea, Cattails, Coontail, Duckweed, Elodea, Frog's Bit, Hydrilla, Naiad, Pennywort, Pondweeds, Salvinia spp, Water Hyacinth, Water Lettuce, and Watermilfoils.
Application EquipmentBackpack Sprayer, Pump Sprayer, Spray Rig
Application MethodsBroadcast Spray, Spot Treatment
Active IngredientDiquat dibromide 37.3%
Product TypeHerbicide
FormulationEmulsifiable Concentrate (EC)
Application RateFor landscape spot treatments, use 0.75 oz of Reward Herbicide with a nonionic surfactant in 1 gallon of water. For spot treatments of aquatic weeds, mix 2 quarts of Reward plus a non-ionic surfactant per 100 gallons of water.
Shelf LifeReward Herbicide will last 3 to 5 years in storage when stored in a cool dry place.
YieldCoverage area of Reward Landscape & Aquatic Herbicide will vary depending on the application at a maximum of 1 gallon per acre.
Use SitesOutdoors
Time to KillReward Landscape & Aquatic Herbicide begins killing weeds within minutes after application but can take up to several weeks to get complete control depending on the target weed.
Comparable ProductsDiquat Dibromide Herbicide
Incompatible Home SidingBrick, Hardie Plank, Stone Veneer, Stucco, Wood, Vinyl
EPA Registration #100-1091

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