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Target Pests


For Use In

Dithiopyr can be used on established grasses including, bentgrass, bluegrass, fescue, ryegrass, bermuda, St. augustine, and zoysia. It is important that grasses are fully established before using Dithiopyr.,


Apply Quali-Pro Dithiopyr 40 WSB in early spring or summer for best results. 

Long grasses should have 7.5 oz of Dithiopyr per acre applied for total pre-emergent weed control.

Short length grasses need applications of 15 oz of Dithiopyr per acre for pre-emergent control of weeds

Mix needed rate of Dithiopyr with sufficient water to get even coverage.

After application it is necessary to irrigate 1/2 inch of water for best results.

Coverage Area

Each 20oz of Dithiopyr 40 WSB will provide pre-emergent weed control for up to 4 acres.

Time to Kill

This product is for pre emergent control of weeds. It will only prevent weeds from growing not actively kill them.

Active Ingredient

Dithiopyr 40%

How To

Quali-Pro Dithiopyr 40 WSB must be activated to be effective. Activationis achieved by watering-in from rainfall or irrigation (1/2 inch or more).Time applications to ensure that activation occurs before the tillering stageof crabgrass development or prior to germination of all other weeds.

Dithiopyr 40 WSB Pre Emergent

Product Q & A

Solutions ()

Dithiopyr 40 WSB Pre Emergent

For early post-emergent control of crabgrass and preemergent control of over 40 grassy and broadleaf weeds in established lawns, golf courses, field-grown nurseries, landscape ornamentals and more.
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Customer Reviews

  • Dithiopyr 40 WSB Pre Emergent
    By Bojidar Savov on 5/10/2013
    Work well for my lawn. Goog seller.



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