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Nitrophos Barricade Granular Pre-emergent Herbicide

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Barricade Herbicide by Nitrophos contains Prodiamine and is designed for the pre-emergent control of grassy and broadleaf weeds in established turfgrass and many other non-crop areas. Barricade must be applied previous to the seed germination or following the removal of existing weeds in order to obtain control of target weeds.

Target Pests

Barricade is used for pre-emergent control of grassy and broadleaf weeds such as barnyardgrass bluegrass carpetweed chickweed crabgrass foxtails goosegrass henbit itchgrass johnsongrass knotweed kochia lovegrass pigweed rescuegrass spurge witchgrass and yellow woodsorrell.

For Use In

Barricade Herbicide is for use in established turfgrass lawns sod nurseries container ornamentals feild grown ornamentals landscape ornamentals conifer nurseries seedling nurseries rights of way roadways roadsides railways equipment yards tank farms pumping stations parking areas storage areas ungrazed fence rows and christmas tree farms.


Barricade is applied with a broadcast spreader at a rate of 10 pounds per 5000 square feet.

Coverage Area

Each 10 lb bag will treat up to 5000 square feet.

Time to Kill

Barricade is specifically for pre-emergent control of grassy and broadleaf weeds.

Active Ingredient

Prodiamine .58%

Nitrophos Barricade Granular Pre-emergent Herbicide


Product Q & A

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Why did you choose this?
Solutions Stores Store
widely recommended for St Augustine grass.
James K on Aug 7, 2017
widely recommended for St Augustine grass.
James K on Aug 7, 2017
"Barricade is for selective preemergence control of grass and broad leaf weeds in lawns up to 5,000 sq.ft." - Is this statement for the 10 pound bag or the 50 pound bag? Thanks
BBsouthern on May 5, 2017
BEST ANSWER: The 10 lb bag of Barricade will cover 5,000 square feet.
When do I apply it?
A shopper on Aug 9, 2017
BEST ANSWER: You will want to apply barricade in the spring and fall months for weed control to prevent emergent of weeds.
Safe for bermuda grass?
Kathy P on Sep 16, 2017
BEST ANSWER: Yes, Barricade can be applied to established lawns including bermuda.
How old should a newly seeded area be before using this product? Not just seeded - now about 7 weeks old.
Dawn C on Aug 11, 2017
BEST ANSWER: You will want to wait at least 8 weeks for a new seeded lawn to be established.
50lb bag and a 10 lb bag together will it take care of 19,000 sqft of cool season turf ?
Gregory D on Oct 16, 2017
BEST ANSWER: Each 10 lb bag will treat up to 5000 square feet, so you would need at least 40lbs of Barricade.
Should I use baricade in the fall and spring ?
Gregory D on Oct 7, 2017
BEST ANSWER: You should use Barricade pre-emergent should be used in the fall and the spring months, to control winter weeds as well as spring weeds.
Does this product have a high percentage of nitrogen? Where can I view the analysis?
DannyDaze on Dec 4, 2017
BEST ANSWER: The active in this product is Prodiamine as a pre-emergent.

Prodiamine .58%
Goran grass has taken over my flower beds where I have lily bulbs and day lillies planted. I want to dig up everything in the bed, treat the soil with a pre-emergent, and replant the bulbs. Bad idea?
Lynn F on Nov 25, 2017
BEST ANSWER: The barricade will not prevent the bulbs from coming up, so you can spray the entire flower bed with herbicide, say Glyphosate, then apply the pre-emergent, on top. Mulch and wait for the bulbs to return in the spring. Apply a second application of pre-emergent to the flower beds in the spring.

Will Barricade kill/ retard grass burrs?
Herb N on Nov 13, 2017
BEST ANSWER: When barricade is applied at the correct times, it will prevent germination of grass burrs in your lawn. You will want to apply in early spring.
Does Barricade work on quackgrass and orchardgrass?
Doug H on Nov 11, 2017
BEST ANSWER: Yes, you can stop germination of quackgrass and orchardgrass by the application of a pre-emergent such as Barricade.
Does this control Japanese Stilt Grass?
A shopper on Nov 6, 2017
BEST ANSWER: Yes, Barricade would work to control germination of Stilt Grass. Preemergence herbicides - can be used on this summer annual but must be applied earlier than that targeting crabgrass. University research shows that PRE herbicides can be applied early in the spring or even in the winter and not lose significant length of control. This is because they are broken down microbially and cold temperatures in the spring limit microbial degradation from early applications. However, split applications are recommended in areas with prolonged germination of summer annuals.
Postemergence selective herbicides - can be used after stiltgrass has germinated but all POST herbicides are most effective on small, young weeds. Multiple applications are likely needed for best control.
is this product good for goose grass In a fescue yard ?
A shopper on Nov 4, 2017
BEST ANSWER: Yes, Barricade is a great product to use to control goose grass in a fescue lawn, pre-emergent is the first step to control. Should apply in the fall and spring months.
Setting for Scott edge guard mini?
A shopper on Oct 31, 2017
BEST ANSWER: https://www.scotts.com/en-us/spreader You will need to try and login to get the settings on this unit, it will be usually the 2 or 3.
Does this work to eliminate basket grass?
Peter K on Oct 30, 2017
BEST ANSWER: Yes, a pre-emergent such as Barricade will work to eliminate Basket grass and other germination in the fall and spring.
does this work on buffalo grass?
A shopper on Oct 27, 2017
BEST ANSWER: Yes, you can use a pre-emergent on Buffalo grass to control winter and spring weeds.
will this product control/ kill poa annum?
howard r on Oct 27, 2017
BEST ANSWER: It will not kill the poa annum, but prevent any germination.
Does it prevent clover?
Neal M on Oct 25, 2017
BEST ANSWER: Yes, Barricade can be used to control clover germination. Barricade can go a little down earlier that most other preemergents.
what are the micor nutrients?
horsey on Oct 25, 2017
BEST ANSWER: I am not completely sure what they are. I do know from experience that this is great product for use on your lawn to control germination of weeds.
I have a problem with goat head stickers. What is the best pre-emergent to put down and when? I have dug up the plants but there are goatheads on the ground. I am in the Texas Hill Country West of Austin.
Ken W on Oct 16, 2017
BEST ANSWER: This is a great pre-emergent, you will definitely want to apply in the spring for goathead weeds, but I would also recommend a fall application of pre-emergent as not to miss any window of germination.
Can this product be used in fall to keep weeds from coming up?
Peg,M on Oct 7, 2017
BEST ANSWER: Yes, the Barricade is a perfect pre-emergent to stop weeds from germinating this fall and a second application in the spring will do the same.
Setting for scott standard spreader for 10 lb bag?
A shopper on Sep 30, 2017
BEST ANSWER: Barricade is applied with a broadcast spreader at a rate of 10 pounds per 5000 square feet.

Unfortunately, we do not know the settings, you will have to login to their website and put in the spreader model you have with a registration number.

will this product help with goat head?
Audrey R on Sep 19, 2017
BEST ANSWER: https://www.solutionsstores.com/oryzalin-pre-emergent-herbicide

Oryzalin has Goat Head weed listed on the label.
Pet safe?
Roy S on Sep 16, 2017
BEST ANSWER: Yes, the Barricade is safe to use when you have pets, let it completely dry before they are allowed to reenter.
Sand bur control?
A shopper on Sep 9, 2017
BEST ANSWER: Yes, you can use Barricade to control sand burrs on your properly, make sure to make a complete application for complete control.
is thiproduct good for st Augustine grass
PAC on Jul 3, 2017
BEST ANSWER: Yes, Barricade can be applied to St. Augustine grass without chance of injury, as a pre-emergent.

Will product work on shiny leaf geranium?
LSR on Jun 24, 2017
BEST ANSWER: IT will work as a pre-emergent is you apply it at the correct time. The Shiny Leaf Geranium Once well established it is very difficult to eliminate. As a class B noxious weed it is a landowner�s responsibility to contain it however. As with most weeds it is important to take control measures before the plants go to seed. The good news is it appears the seeds may only be viable for several years.

The plants seed in late June through July so March and April are the ideal times to take corrective action.
Is watering of lawn recommended immediately after applying this product?
sandra on Jun 21, 2017
BEST ANSWER: Yes, it will need to be watered in after you apply the Barricade.
what is the best time of the year to apply this product?
oma on Jun 16, 2017
BEST ANSWER: Best time to apply a pre-emergent is in early spring and early fall.
after using your product how do I have to wait to plant new grass seed on bare spots?
Tk on Apr 20, 2017
BEST ANSWER: It all depends on how much you have applied per acre. Depending on the rate will depend on how long you will have to wait for germination to begin. The minimum time is 4 months. Depending on how big the spots are I would also recommend to give it some time and the grass will take over the bare spot in a few weeks sometimes it can take longer. Make sure to fertilize the lawn and water it frequently a healthy lawn will have less weeds.
Is Barricade pre-emergence control safe to apply in a vegetable garden? Will it kill henbIt? I would like to apply it in the fall.
Rrsr on Apr 14, 2017
BEST ANSWER: Barricade will prevent anything from germinating so you would have to plant adults, and it should be able to prevent henbit.

Customer Reviews

5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Good deal
Item was exactly as described. Havenâ??t used it yet.
October 21, 2017
2 months ago
Went down easy
First time using Barricade, so don't yet know if it will keep the weeds out of my lawn, but I got it on a recommendation.
October 17, 2017
2 months ago

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