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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)

Get Solid Pre-Emergent Crabgrass Control with Prodiamine 65


With it being winter and the cold weather now becoming the norm for the time being, this dormant period of the year may make people forget what they were plagued with during the past growing season. Some of the usual suspects are crabgrass and various other broadleaf weeds. While it may appear that the crabgrass have died out, the seeds of these weeds are very much alive but are in hiding, using all the nutrients of your soil to hibernate and rise up in the Springtime to ugly up your yard.


Crabgrass germinates at different times throughout the US depending on the areas which live and the depending on the temperature zones which you live in. While you could get a handle on crabgrass when you seem them spring out of your soil with a post-emergent herbicide like MSMA or something similar, killing it when it is actively growing is only half the battle.


One must bare in mind that when you spray crabgrass to kill it you’re not killing the seed pods that the crabgrass is distributing during the growing season. What has to be concentrated on is how to control the seed before it germinates the following year. The best way to do this is through a pre-emergent product and one of the tried and true products which has successfully handled weeds like crabgrass is Prodiamine.


Why Prodiamine WDG works so well


Prodiamine WDG is an older product which has been a premium method for a number of years by landscapers and lawn maintenance professionals as an effective way of treating crabgrass and other weeds before they germinate. It is in a dry formulation that you mix with water as the name indicates (WDG stands for Wettable Dispersible Granule). Once you mix it you spray about 30-45 days before the crabgrass would emerge. That way we have a barrier down to take care of that ceiling as it germinates and hopefully give you full-season control and if not a little bit of post-emergent follow up application later on.


This is an excellent and very safe product and can be used in turf as well as ornamental beds. Apply 2 tablespoons to a gallon of water. This diluted substance will be able to cover a 20-50 foot or 1000 square foot area. A whole container of Prodiamine WDG should take care of several acres.


Ideal Times For Prodiamine Application

Beginning of January is a good place to apply in the southern states and based on a map of temperate zones in the United States, the time will vary going upwards from the south. For instance if you’re in the midsouth, application may be done during mid february and gradually go up from the different temperate zones. Prodiamine can be applied during the warm season as well. If you ever go in to clean up an ornamental bed in season, once you have cleaned it you can use prodiamine to keep the seedling that is in the soil from rising up again.


Checkout our Lawn Care Guides

Things To Keep In Mind When Using Pre-Emergents

While we don’t want to discount the solid effects of Prodiamine and how it has successfully controlled plenty of different weeds of various types of grass and turfs, it is important to note that with prodiamine or any pre-emergent herbicide, that the results may not be 100 percent. Depending on the resilience and stubbornness of some hard-to-control weeds, there may still be some weeds that pop up during growing season meaning that some post-emergent treatment may have to still be conducted.


However, if you use Prodiamine, even if some weeds do creep up out of the ground, it will not be much and you may have to do minimal post-emergent applications at worst case.

 DIY Weed Control Guide for Warm Season Grasses




Red Spray Pattern Indicator (Brandt Mark-It) - Keep track of your spraying and avoid overspraying with this spray.


Help the Roundup stick better to the weeds with surfactant such as Alligare 90 Wetting Agent


As always, stay safe when spraying chemicals with the help of homeowner pesticide safety kit


Product Q & A

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Browse 61 questions Browse 61 questions and 78 answers
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.
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.
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.
I'm looking to overseed this fall, how long do I have to wait until I can apply this on my lawn?
A shopper on Sep 19, 2018
BEST ANSWER: If you apply this pre-emergent now you cannot overseed.
Can I use the granular Prodiamine with a broadcast spreader before a rain?
Linda B on Feb 10, 2018
BEST ANSWER: No. That would apply way too much! These are wettable granules that must first be dissolved in water. A typical spring application would be about 0.45 oz. per 1000 square feet. It would be impossible to apply at that rate with a spreader.
What is the best kind of sprayer to use on this product?
Rachel G on Aug 16, 2018
BEST ANSWER: A handheld pump sprayer should suffice. Check this one out.

Solutions 1 Gallon Pump Sprayer- Poly Construction Lifetime Warranty

Do you water in the Prodiamine afterwards?
Barry G on Jan 7, 2018
BEST ANSWER: I believe the label said there needs to be rain, or the lawn watered within a week or so.
I live in Tennessee.....when should i apply this product in the Fall to prevent the emergence of Spring broadleafs; etc?
markm3000 on Apr 4, 2018
BEST ANSWER: We have calendar and maps on our lawn control page.

April would be the ideal time to apply a pre-emergent.
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.
what is difference this one from NITROPHOS BARRICADE GRANULAR PRE-EMERGENT HERBICIDE ? they are not same thing ?
A shopper on Sep 6, 2018
BEST ANSWER: Prodiamine .58% in Nitrophos Pre-emergent and it is a granule that is applied and watered in.

Prodiamine 65WDG is Prodiamine 65.0% and is water soluble and is mixed with water and applied.
what dillution rate and mixture rate per 1000sqft if used in an ortho dial and spray?
bret f on Aug 21, 2018
BEST ANSWER: From the label:
Quali-Pro Prodiamine 65 WDG must be mixed thoroughly in the spray tank to ensure uniform
application. It wouldn't be recommended to use a hose end sprayer as the product would not mix well enough since it's a granular.
I know it's almost May, but is it too late to apply Barricade to prevent sandburs/stickers? Specifically Cenchrus spinifex?
Jay N on Apr 28, 2018
BEST ANSWER: Where are you located and at what temperature do those pesky weeds germinate?
Find the answer to those questions then go to your local Farm Bureau's website and find the 4" soil temperature for your neck of the woods. Good luck!
How many containers of this product would I need to cover 4 acres?
Matt D on Apr 8, 2018
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.

So you would need 1 - 2 containers, just depends on how strong you mix it.
can this be used on a established fescue lawn?
A shopper on Feb 21, 2018
BEST ANSWER: Yes it would cause no harm to the established lawn.
can it be use to kill duckweed on pond?
Dick l on Oct 7, 2018
BEST ANSWER: No, prodiamine is not the best product to use for duckweed control. Check out our Duckweed control page for a number of different herbicide recommendations. https://www.solutionsstores.com/duckweed-control
does this kill kylinga?
A shopper on Oct 1, 2018
BEST ANSWER: It does not kill kylinga, but can prevent the seeds from germinating when applied early spring.
Can I apply to St Augustine lawn that has fungus issues?
Tuan T on Sep 11, 2018
BEST ANSWER: Yes you can. Look into this page to see what you can do about your lawn fungus issues. https://www.solutionsstores.com/lawn-disease-control
Can I use this in a pull behind sprayer?
Kevin J on Sep 11, 2018
BEST ANSWER: Yes, of course that is exactly how I apply my Prodiamine.
How much per gallon of water? On 9/16 Camille answered 1.5 teaspoons per gallon. On 10/17 she answered 1.5 teaspoons per 2 gallons. Thanks for your assistance.
Jim R on Sep 8, 2018
BEST ANSWER: Water is just the carrier, I prefer using 2 gallons per 1000 square feet of area, you will get better coverage. But the rate remains the same.
Can I use this on sand beach near lake?
Kathy R on Jul 13, 2018
BEST ANSWER: You will need to stay about 15 feet away from the water. But yes you can use it in sandy soil.
Does Prodiamine work on grassburrs ?
Freddy J on Jun 27, 2018
BEST ANSWER: Yes, Prodiamine is a great pre-emergent to use to eliminate grassburrs. Application timing is important and should be used in the early spring.

Checkout our Lawn Guide which includes a calendar of application times.


Because Prodiamine is a pre-emergent it will not kill the Grassburrs that are currently there this season, so you will need to find a post emergent. If you let me know what type of lawn we are working with I can get you some recommendations.
Jay H on Jun 21, 2018
BEST ANSWER: Yes, Prodiamine can be used as a pre-emergent on Zoysia grass and it will cause not harm, when applied according to the label.
Green kyllinga sedge took over my lawn in zone 7. Is this the right product?
Joanne M on Jun 4, 2018
BEST ANSWER: https://www.solutionsstores.com/yellow-nutsedge-control

Checkout our Sedge Control section.

Annual Sedge you can control with a pre-emergent, but not perennial Sedge weeds so you will need to treat them when the plant is young.

Please let us know if we can assist you in any other way.
Is this product good to use on yards with goosegrass in South Texas at this time?
A shopper on May 17, 2018
BEST ANSWER: The Prodiamine would be a great pre-emergent to use however it is not recommended to apply at this time. The best time is between Jan-Feb and again in Aug- Sep.
Can Prodiamine be sprayed on grass that has been soaked from a rain storm with additional rain to follow?
Joe S on Apr 16, 2018
BEST ANSWER: We would advise allowing most of the water to dry and then apply. We want to make sure the product sticks to the areas we apply it and it does not drift with the excess water.
how soon can I reseed?
A shopper on Apr 16, 2018
BEST ANSWER: Depending on the application this can be 3-6 months after the application.
What is the shelf life of this product?
markm3000 on Apr 9, 2018
BEST ANSWER: You can easily store the Prodiamine for 3 to 5 years.
Does this effect the spreading ability of St. Augustine and Bermuda?
A shopper on Apr 8, 2018
BEST ANSWER: No, because neither of these lawns spread from seed. You could not apply Prodiamine and then try to reseed a lawn.
Does the grass need to be wet before applying?
Matt D on Apr 8, 2018
BEST ANSWER: It will help if the lawn is wet when you apply the Prodiamine, this is mixed with water and applied.

The most important thing is to use enough water, and get good coverage past the lawn and into the soil area.

Customer Reviews

5.0 / 5.0
4 Reviews
5 Stars
4 Stars
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2 Stars
1 Star
Easy to Use
5.0 / 5
4.0 / 5
4.5 / 5
Safe to Use
4.0 / 5
Would you Recommend?
Yes (2)
Easy to Use
5 / 5
4 / 5
4 / 5
Safe to Use
3 / 5
Would you Recommend?
Killed the majority of my Dallisgrass. Still need to go back and do spot treatments. My bermuda grass stressed a bit and lost some color but recovered.
October 13, 2018
4 months ago
5 / 5
Safe to Use
5 / 5
Would you Recommend?
Pre Emergence crab grass control
Ive had the least crab grass infestation in the last 15 years.
Bill H.
September 13, 2018
11 months ago
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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