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Prodiamine 65 WDG (Barricade Herbicide)

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Prodiamine 65 WDG is an excellent pre-emergent herbicide that is activated by water. It is easy to use, safe and effective. It provides excellent control for broadleaf and grassy weeds with a long-lasting residual to contain susceptible weeds and prevent new growth from occurring.

Target Pests

Same Exact Active as Barricade. Save Money Works Great! Prodiamine 65 WDG is perfect for controlling barnyardgrass bluegrass carpetwood chickenweed crabgrass crowfootgrass cupgrass foxtails goosegrass and broadleaf weeds.

For Use In

This product is safe to use on turfgrass plantings roadsides tank farms storage areas Christmas tree farms golf courses fields nurseries and lawns.


APPLICATION Apply Quali-Pro Prodiamine 65 WDG in a minimum of 20 gals./acre (0.5 gal./1000 sq. ft.) of carrier (water and/or fluid fertilizer) using a calibrated, low-pressure sprayer with 50 mesh or coarser screens. A broadcast boom or handheld wand designed for herbicide or insecticide application will provide the best results. Select nozzle pressure and gallonage to provide complete coverage.

For optimum weed control, Quali-Pro Prodiamine 65 WDG should be activated by at least 0.5 inch of rainfall or irrigation before weed seeds germinate and within 14 days following application. See the map below for approximate crabgrass seed germination dates.

Time to Kill

When used as directed Prodiamine should kill weeds quickly and leave a lasting residual allowing for you to wait to reapply the product in longer intervals.

Mix Rate

Mix Prodiamine at a rate of 1.0 to 2.3 lbs per acre or 0.4 oz to 0.83 per 1000 square feet. Apply at a rate of 20 gallons per acre.

Active Ingredient

Prodiamine 65.0%

How To

Application time for Pre-emergents

Pre-emergents  will not control weeds that have germinated prior to application. So you need to apply a pre-emergent 
several weeks before germination. If they are applied too soon before germination, the herbicide may lose its effectiveness. 
For the fall a good rule of thumb is to apply a pre-emergent the third week of August to mid-September.
Exact dates are hard because it has to do with location and the weather temperature at the time.

Prodiamine 65 WDG (Barricade Herbicide)

Product Q & A

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Browse 32 questions Browse 32 questions and 37 answers
Will this product work on Poa annua (seeds, not existing infestation)?
Bitty on Jul 17, 2017
BEST ANSWER: Yes, Prodiamine pre-emergent will work on all un-germinating seeds.
Can I apply this to an established St. Augustine lawn? Do I spray it on the entire lawn even on the good grass?
Ryan on Mar 31, 2017
BEST ANSWER: Yes, use an initial rate of 0.75-1.5 lbs./acre (0.28-0.55 oz./1000 sq. ft.) per application.
Do you water in the Prodiamine afterwards?
Barry G on Jan 7, 2018
BEST ANSWER: The Prodiamine is mixed with water and then sprayed as a liquid mixture.

If you are looking for a granular pre-emergent we offer Balan, and Barricade.

These both are applied as a granule and then watered in to activate.


I have an ATV mount 14 gallon 2.2 gal per minute sprayer - How much Prodiamine 65WDG do I put in the sprayer? Thanks - very confusing manual Bob
Bob W on Dec 5, 2017
BEST ANSWER: That’s a great question . I was assigned a contact by the company named Camille. She is out of One of their Texas Stores. . I emailed her what I was using and she calculated what I needed to add per gallon. It wasn’t very much and worked like a charm. I wish I still had that email with the calculation per gallon.
Is this effective for Dallisgrass? If not what is best pre emergent for Dallisgrass? I have 1 acre bermuda grass lawn in Texas.
Sean on Jun 12, 2017
BEST ANSWER: Yes, it will work for Dallisgrass if you can apply at the correct time. Postemergent The postemergent herbicides MSMA or CMA (such as Weed-Hoe or Weed-B-Gon Crabgrass Killer for Lawns) can be used by home gardeners to control clumps of dallisgrass growing in lawns. These herbicides are relatively selective and must be applied two to three times at 3-week intervals in the summer. The turfgrass and dallisgrass should be in good growing condition before application. Also, it is best if the turf is left unmowed for 2 weeks before the first application to create the maximum amount of leaf area for coverage by the herbicide spray. Withhold irrigation for 24 hours after application. Don�t apply these herbicides during extremely hot weather and check the label for rate adjustments during warm weather to minimize the risk of injuring the turfgrass. There are some restrictions on turfgrass types where these products can be used, such as on St. Augustinegrass.

Foramsulfuron (Revolver) is a new postemergent herbicide for control of cool-season grass weeds and turf species in warm season lawns. It can only be used in bermudagrass and zoysiagrass lawns and has good weed control activity on dallisgrass, but be aware that it is harmful to most cool season turfgrasses. This product is only available to professional applicators at this time, but may be used on residential lawns.
Spraying my yard 1000sqft at a time. How many ounces for each gallon of water? I have a two gallon pump sprayer.
Walt R on Oct 19, 2017
BEST ANSWER: Use 1.5 teaspoons per 2 gallons of water to cover the 1,000 square feet of area.
How much you put in 200 gal tank?
A shopper on Sep 24, 2017
BEST ANSWER: It matters more how many acres you are wanting to treat with the 200 gallons of water, typically use 100 gallons to treat a 1 acre area. Mix Prodiamine at a rate of 1.0 to 2.3 lbs per acre per 100 gallons to cover that acre.
Can this be used in conjunction with quinclorac? With applications being around same time?
jordan j on Aug 18, 2017
Prodiamine 65 WDG (Barricade Herbicide)
Prodiamine 65 WDG (Barricade Herbicide)
Quinclorac 75 DF Herbicide (Crabgrass Killer)
Quinclorac 75 DF Herbicide (Crabgrass Killer)
BEST ANSWER: Yes, you can apply Quinclorac 75 DF and Prodiamine 65 WDG together.
Will this product stop Bahia grass seed from emerging?
FlowerLady on Jun 10, 2017
BEST ANSWER: If applied at the proper time the product will not harm the Bahia grass. To reduce the potential to injure overseeded turf, wait 60 days after seeding or until after the second mowing, whichever is longer, before applying Quali-Pro Prodiamine 65 WDG.
Can this be used to control my crabgrass in tall fescue? I just overseeded a week ago. How long do i have to wait to spot spray, not blanket my entire lawn?
alan on Apr 14, 2017
BEST ANSWER: you shouldnt use this on any part of your lawn where you are trying to grow new grass. you should wait a minimum of 5 -6 weeks after the new seed has germinated.
can you use an ortho hose sprayer once you mix it
geeck on Mar 7, 2017
BEST ANSWER: Yes you can use the hose end sprayer with Prodiamine.
Will this kill blue grass annual?
Lala on Mar 6, 2017
BEST ANSWER: The Prodiamine 65 WDG will not kill the current Bluegrass but it will prevent new growth.
Can this be used in grass pastures that aren't being grazed but that are strictly cut and baked for hay fields to feed cattle. A spring application with round up pro and LV-6 would seemingly leave a clean field with a residual through growing season.
Okie Spray guy on Feb 22, 2017
BEST ANSWER: No Prodiamine cannot be used on grazed pastures, but does not list pasture grass for hay on the label. It appears Grazon has a pre-emergent and could be used, but it does require a license.

http://www.haytalk.com/forums/topic/12516-pre-emergent-herbicide/ This is a good forum for questions and answer also.
How many square feet will a 5 pound container cover?
Chris on Feb 22, 2017
BEST ANSWER: Mix Prodiamine at a rate of 1.0 to 2.3 lbs per acre or 0.4 oz to 0.83 per 1000 square feet. Apply at a rate of 20 gallons per acre.

Will cover up to 5 acres with the one Prodiamine container
Is this safe to use when growing new grass from seed? If not, what is the recommendation on timing?
Chris on Feb 22, 2017
BEST ANSWER: No cannot use this when you are reseeding, best to apply a Glyphosate product and then seed, after lawn is established you can then add a pre-emergent for the fall weed prevention.
What is Container size for Prodiamine 65 WDG ?
Carl on Dec 23, 2016
BEST ANSWER: The Prodiamine 65 WDG is a 5lb container and will cover about 5 acres of area.
Will this kill Grass Burr(Sticker Burrs)?
Sticker Burr on Dec 7, 2016
BEST ANSWER: The Prodiamine will not kill Grass Burrs but when applied at the correct time of the year as a pre-emergent will prevent germination and thus prevent them from surviving.

Should apply in early spring and late fall to control all weeds from germinating by seed.
Is this safe to use around dogs? If not, how long do you wait until it is safe?
Dogs on Oct 25, 2016
BEST ANSWER: Yes it is safe to use around your pets, just allow this to completely dry before they are allowed reentry about 3 to 4 hours.
Is this safe to use on pasture where livestock graze?
Cindy on Oct 16, 2016
BEST ANSWER: No this cannot be used on pastures that are grazed.
will prodiamine 65 control johnsongrass?
rockytop on Oct 7, 2016
BEST ANSWER: HOW PRODIAMINE 65 WDG WORKS PRODIAMINE 65 WDG controls susceptible weeds by preventing growth and development of newly germinated weed seeds. Weed control is most effective when PRODIAMINE 65 WDG is activated by at least 0.5 inch of rainfall or irrigation or shallow incorporation (1-2 inches) before weed seeds germinate and within 14 days following application.

Yes you can use this to control Johnsongrass and a large extensive list of other weeds.
what can i use to control johnson grass and not harm other pasture grasses?
rockytop on Oct 7, 2016
BEST ANSWER: Prodiamine is labeled for control of johnsongrass, but it will also prevent any other type of pasture grass from germinating.

Clumps and individual plants may be hand pulled during June, just after a rain when the ground is soft. All plant parts should be removed from the area. Broken stems and roots left in the ground should be dug up if only a small area is involved. It is more effective to spot-treat the individual plants with herbicide than to pull them, and large clumps can be sprayed with 2 percent�Roundup using a hand sprayer or backpack sprayer. Herbicide treatment may need to be repeated for several years to ensure good control.
Will this help control grassburs?
JMc on Oct 2, 2016
BEST ANSWER: Yes, the Prodiamine is what I would recommend that you use for controlling Grassburs. Perfect Solution!
Cant find this products in Puerto Rico and shipping seems tome cant be possible due regulations. Any help where i can find this product or fir shipping.
Jesusmve on Sep 12, 2016
BEST ANSWER: We would have to check with manufacture on this product being shipped to Puerto Rico.
How much oz per gallon is the mix for 1000sq feet.
Jesusmve on Sep 7, 2016
BEST ANSWER: 0.4 oz per gallon of water per 1,000 square feet of area, that would be 1.5 level teaspoons per gallon.
This product can be used in zoysia manila grass?
Jesusmve on Sep 4, 2016
BEST ANSWER: Yes it can be applied to your type of grass, the Prodiamine 65 WDG is a pre-emergent and will prevent germination, but not harm and grasses.
Can this product be used in apple orchards?
steveoestreicher on Aug 29, 2016
BEST ANSWER: Yes, Prodiamine can be used in Apple Orchards to prevent weeds from germinating.
Also, will it control marestail?
steveoestreicher on Aug 29, 2016
BEST ANSWER: Yes, the Prodiamine can be use as a pre-emergent to keep any from germinating.
Will Prodiamine 65 be an effective pre emergent for foxtail?
Cali lawn on May 15, 2016
BEST ANSWER: Yes the prodiamine will stop foxtail from germinating when applied according to the label.


Here is the label for you to refer to for rates.
Weeds Controlled�Vegetation Management
When used as directed in this label, Quali-Pro Prodiamine 65 WDG will control the following weeds:
Bluegrass, Annual (Poa annua)
Chickweed, Common1
Chickweed, Mouseear (from seed)
Crabgrass (Large, Smooth)3
Cupgrass, Woolly
Foxtails, Annual
Johnsongrass (from seed)
Lambsquarter, Common
Panicum (Texas, Fall, Browntop)
Purslane, Common
Pusley, Florida
Signalgrass, Broadleaf
Speedwell, Persian
Spurge, Prostrate
Woodsorrel, Yellow (from seed)
I have a ton of bluegrass mixed with red fescue and tall fescue. Will this kill my bluegrass in upstate New York.
DWeaver on Apr 14, 2016
BEST ANSWER: Prodiamine will not kill actively growing bluegrass. It is a pre-emergent herbicide. You would put it down in the fall to prevent any new growth in the spring. To kill active bluegrass in fescue you can pretty much only use glyphosate and reseed or weed it up. If you have poa annua then you would use ethofumosate but it is very expensive for the benefit.
I grow a large number of roses. The plants are mulched with wood chips. I am looking for a product to control weeds in the beds and under the plants. Many products indicate direct application to the soil. Is that the case with this product?
Central Florida Gardener on Apr 7, 2016
BEST ANSWER: Any pre-emergent herbicide needs to reach the soil to be effective. They work by preventing seed germination in the treated area. Most people treating mulched areas will use extra water to ensure the active ingredient gets down to the soil and will be effective. If applied properly pre-emergents need to penetrate the top 8" of the soil level as that is where seed germination typically happens.

Customer Reviews

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Awesome product
Prodiamine is the best pre-emergent!
January 27, 2017
Glad I learned about this!
I had no idea what a pre-emergent was until I spoke with Solutions Pest and Lawn. Wow what a difference, it took care of my stickers in the first season! Thanks!
January 27, 2017

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