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QUALI-PRO

Dithiopyr 40 WSB Pre Emergent Herbicide

Dithiopyr 40 WSB is a pre-emergent herbicide that controls annual grasses and broadleaf weeds in various areas. It is safe to apply to residential lawns and ornamental landscapes.

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Dithiopyr 40 WSB Product Page
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Dithiopyr 40 WSB Pre Emergent Herbicide, manufactured by Quali-Pro, is an effective pre-emergent herbicide used to prevent unsightly vegetation from growing on turfs and lawns. 

It uses the active ingredient Dithiopyr to control common annual grasses and broadleaf weeds such as crabgrass and carpetweed.

Dithiopyr 40 WSB Pre Emergent Herbicide can be used on golf courses and residential properties to keep the turf looking healthy and beautiful. The herbicide comes in 5-ounce water-soluble packets and is compatible with various liquid fertilizers and pesticides for enhanced lawn care. Apply Dithiopyr 40 WSB Pre Emergent Herbicide for beautiful landscapes and ornamental lawns.

Tools Needed

You will need a professional skid sprayer since Dithiopyr 40WSB is meant for large-area treatments.

How to Use

Spraying Dithiopyr 40WSB with a Spray Rig

  • Step 1: Determine how much Dithiopyr WSB you need by measuring the square footage of the treatment area. To do this, measure the treatment area's length and width in feet, then multiply them together (length X width = square footage). Dithiopyr WSB comes in water-soluble pouches. Dithiopyr is really only meant for large areas, as one 5 oz. packet mixed with water can treat 10,890 sq. ft.
  • Step 2: Fill your sprayer halfway with water and then add the appropriate amount of Dithiopyr for your application to the spray tank. Fill the sprayer the rest of the way with the required amount of water and then agitate the sprayer to ensure the product is well-mixed.
  • Step 3: Apply the product as a spot treatment to your lawn and make sure the nozzle is pointed as close down to the turf as possible to avoid drift. Use a cone fan nozzle spray setting for uniform coverage. Apply to wet and make repeat applications 3 to 4 months apart for extended pre-emergent weed control.

Where to Use

Dithiopyr 40 WSB Pre Emergent Herbicide can be applied to established residential and commercial lawns, commercial sod farms, non-croplands, industrial properties, ornamental plants, as well as landscape, field-grown, and container materials. When applied to golf courses, Dithiopyr 40 can be applied to fairways, roughs, and tee boxes.

When to Use

This product is only effective when applied before the seed's germination. For crabgrass control, apply Dithiopyr 40 WSB during the spring or early summer.

Safety Information

Dithiopyr 40 WSB Pre Emergent Herbicide is safe to use around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) before mixing or applying this product.

Allow treated areas to completely dry before allowing people and pets to reenter.

Special Considerations

Four 5-ounce water-soluble packets come in one Dithiopyr 40 WSB Pre Emergent Herbicide bag. Dithiopyr 40 WSB Pre Emergent Herbicide will not kill targeted weeds after emerging from the ground unless it is applied to control Crabgrass before the stem begins to form.

AvailabilityOnline
Restricted UseNo
Shipping Restrictions
* = not registered** = restricted use
20 Ounce: AK*, AL*, AR*, AZ*, CA*, CO*, CT*, DE*, FL*, GA*, ID*, IL*, IN*, LA*, MA*, MD*, ME*, MI*, MN*, MO*, MS*, MT*, NC*, ND*, NE*, NH*, NJ*, NM*, NV*, NY*, OK*, OR*, PA*, SC*, SD*, TN*, TX*, UT*, VA*, VT*, WA*, WI*
BrandQUALI-PRO
Keith's Pro Tips"For maximum results when using Dithiopyr 40 WSB Pre Emergent Herbicide, ensure there are no existing weeds present because pre-emergent will not be able to control established weeds."
Product DrawbacksDithopyr 40 WSB will not control weeds that have already emerged. If your target weed has already appeared, you will need to use a post-emergent herbicide.
Target PestsAnnual bluegrass, Barley, Barnyardgrass, Bittercress, Black Medic, Brome, Buttercup Oxalis, Carolina eranium, Carolina Geranium, Carpetweed, Chickweed, Common Lespedeza, Common Purslane, Corn Speedwell, Creeping Woodsorrel, Crowfootgrass, Dallisgrass, Garden Spurge, Giant Foxtail, Goosegrass, Green Foxtail, Henbit, Kikuyugrass, Large Crabgrass, London Rocket, Marestail, Mary's Grass, Mustard, Parsley-Piert, Pineappleweed, Prostrate Knotweed, Prostrate Kotweed, Prostrate Spurge, Purple Coneflower, Redroot Pigweed, Sandbur, Shepherdspruce, Smooth Crabgrass, Smutgrass, Southern Crabgrass, Spotted Spurge, Wild Oat Ryegras, Yellow Foxtail, and Yellow Sorrel.
Application EquipmentBackpack Sprayer, Gloves, Pump Sprayer, Spray Rig
Application MethodsBroadcast Spray, Spot Treatment
Active IngredientDithiopyr 40%
Product TypeHerbicide
FormulationWater-Soluble Powder
Application RateA 5 oz. Water Soluble Packet of Dithiopyr 40WSB will treat 10,890 sq. ft in at least 25 gallons of water per acre or minimum of 1 gallon per 1,000 sq. ft.
Shelf LifeDithiopyr 40 WSB Pre Emergent Herbicide will last for up to 1 to 2 years when stored according to the product label. Store Dithiopyr in a cool, dry storage areas using the original container.
Yield1 packet of Dithiopyr 40 WSB Pre Emergent Herbicide will treat up to 10,890 square feet, or 0.46 ounces per 1,000 square feet.
Use SitesOutdoors
Time to KillDithiopyr 40 WSB Pre Emergent Herbicide prevents the growth of weeds by killing the seeds.
Comparable ProductsBalan 2.5 G Pre Emergent Herbicide
Incompatible Home SidingMetal
EPA Registration #53883-374
More Information
Restricted Use No
Shipping Restrictions AK, AL, AR, AZ, CA, CO, CT, DE, FL, GA, ID, IL, IN, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OK, OR, PA, SC, SD, TN, TX, UT, VA, VT, WA, WI
Availability Online
Signal Word CAUTION
Keith's Pro Tip "For maximum results when using Dithiopyr 40 WSB Pre Emergent Herbicide, ensure there are no existing weeds present because pre-emergent will not be able to control established weeds."
Time to Kill Dithiopyr 40 WSB Pre Emergent Herbicide prevents the growth of weeds by killing the seeds.
Chemical Type Herbicide
Formulation Water-Soluble Powder
Application Methods Broadcast Spray, Spot Treatment
Product Drawbacks Dithopyr 40 WSB will not control weeds that have already emerged. If your target weed has already appeared, you will need to use a post-emergent herbicide.
Active Ingredient Dithiopyr 40%
Application Equipment Backpack Sprayer, Gloves, Pump Sprayer, Spray Rig
Mix Rate A 5 oz. Water Soluble Packet of Dithiopyr 40WSB will treat 10,890 sq. ft in at least 25 gallons of water per acre or minimum of 1 gallon per 1,000 sq. ft.
Use Sites Outdoors
Yield 1 packet of Dithiopyr 40 WSB Pre Emergent Herbicide will treat up to 10,890 square feet, or 0.46 ounces per 1,000 square feet.
EPA Registration No. 53883-374
Shelf Life Dithiopyr 40 WSB Pre Emergent Herbicide will last for up to 1 to 2 years when stored according to the product label. Store Dithiopyr in a cool, dry storage areas using the original container.
Comparable Products Balan 2.5 G Pre Emergent Herbicide
Children or pets? No
Property Characteristics None

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