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SYNGENTA
Barricade 4FL Herbicide
Barricade 4FL Herbicide is a pre-emergent herbicide that, with a single application, can prevent over 30 different broadleaf and grassy weed species in turfgrasses all season long.
As low as
$29.50
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Barricade 4FL Herbicide Product Page
Min : 29.5 - Max : 167
Price as of
10/22/25
10/22/25
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Barricade 4FL Herbicide, manufactured by Syngenta, is a flowable suspended concentrate pre-emergent herbicide that offers the control of both grassy and broadleaf weeds control of weeds all year long with a single application.
Comprised of 40.7% Prodiamine, Barricade 4FL Herbicide controls more than 31+ species of weeds on a variety of use sites and can even be applied to ornamentals.
Barricade 4FL Herbicide can be applied several months before winter and summer weed activity for full germinating weed control. This easy-to-use product provides no staining against certain landscape features, such as fences, if applied according to the product label instructions.
Tools Needed
You will need a backpack, spray rig, or hand-held pump sprayer. A hand-pump sprayer would be ideal for smaller applications
How to Use
- Step 1: Determine how much Barricade 4FL Herbicide to use by measuring the square footage of the treatment site. To do this, measure the length and width of the treatment area in feet, then multiply (length X width = square footage). For turfgrass applications, use 0.5 to 1.1 oz. of Barricade 4FL Herbicide per 2 gallons of water per 1,000 sq. ft. For acreage applications on turfgrass, use 21-48 oz. of product per 100 gallons of water per acre. Refer to the label for specific application rates.
- Step 2: Fill the sprayer 3/4 of the way with water and then mix in a measured amount of Barricade 4FL Herbicide. Fill the sprayer the rest of the way with water and agitate it until the solution is well-mixed.
- Step 3: Spray the mixed solution as a broadcast or over-the-top spray onto labeled treatment areas. Make sure to set the sprayer on a fan setting to get nice uniform coverage. Water the treated areas with 0.5 inches of irrigation within 14 days after application.
Where to Use
Barricade 4FL Herbicide can be used on established turfgrasses (excluding golf course putting greens), lawns, and sod nurseries. In a container, field-grown, and landscape ornamentals. On established perennial and wildflower plantings. This product may also be applied to Christmas tree farms.
Do not apply to golf course putting greens. Not for use on container-grown plants or food-producing trees, vines, or plants.
When to Use
This product can be applied late summer, fall, or winter before weeds germinate. Apply when plants are not under stress from heat, drought, or frost damage.
If the weed is already growing, Barricade 4FL will not work, and you will have to use a post-emergent herbicide.
Safety Information
Barricade 4FL Herbicide is safe to use around children and pets when applied according to the product label instructions. Always wear the appropriate personal protective equipment (PPE) when mixing or spraying this product.
After treatment, keep pets and children away from the treated area until the product has dried.
Do not graze or feed livestock forage cut from areas treated with Barricade 4FL Herbicide.
Special Considerations
This product may be used with other herbicides and tank-mix partners. Check the label for compatibility rates and the products recommended for use alongside this product. Remember to perform a small compatibility test in small volumes to ensure the chemicals are compatible.
Do not blend Barricade 4FL Herbicide onto dry fertilizer or granular material.
To avoid grass injury, do not apply Barricade 4FL Herbicide to creeping bentgrass mowed at less than 0.5 inches in height.
| Availability | Online |
| Restricted Use | No |
| Shipping Restrictions * = not registered** = restricted use | 4 Ounce: VT** 1 Gallon: VT** |
| Brand | SYNGENTA |
| Keith's Pro Tips | "To increase the effectiveness of Barricade 4FL, add a surfactant to the mixture. Best case scenario, you only need to apply once to keep the weeds away for the entire season." |
| Product Drawbacks | Will not be able to eliminate weeds that have already emerged. You will need to use a post-emergent herbicide if the weeds have sprung up. |
| Target Pests | Annual Bluegrass, Annual Foxtails, Barnyardgrass, Broadleaf Signalgrass, Browntop Panicum, Carpetweed, Common Chickweed, Common Lambsquarters, Common Purslane, Crabgrass, Crowfootgrass, Fall Panicum, Florida Pusley, Goosegrass, Henbit, Itchgrass, Johnsongrass, Junglerice, Knotweed, Kochia, Lovegrass, Mouseear Chickweed, Persian Speedwell, Pigweed, Prostrate Spurge, Rescuegrass, Shepardspurse, Sprangletop, Texas Panicum, Witchgrass, Woolly Cupgrass, and Yellow Woodsorrel. |
| Application Equipment | Backpack Sprayer, Pump Sprayer, Spray Rig |
| Application Methods | Broadcast Spray, Spot Treatment |
| Active Ingredient | Prodiamine 40.7% |
| Product Type | Herbicide |
| Formulation | Suspended Concentrate |
| Application Rate | For turfgrass applications, use 0.5 to 1.1 oz. of Barricade 4FL Herbicide per 1,000 sq. ft. |
| Shelf Life | Barricade 4FL Herbicide will last for 3 years when stored in a dry, cool environment away from water, food, or feed. |
| Yield | Barricade 4FL Herbicide will cover 261,360 sq. ft. when used at the maximum application rate. |
| Use Sites | Outdoors |
| Time to Kill | Barricade 4FL Herbicide prevents weed growth within 60 to 90 days after application. |
| Comparable Products | Dithiopyr 2L |
| Use Caution With | Bentgrass |
| EPA Registration # | 100-1139 |
| Restricted Use | No |
|---|---|
| Availability | Online |
| Signal Word | CAUTION |
| Keith's Pro Tip | "To increase the effectiveness of Barricade 4FL, add a surfactant to the mixture. Best case scenario, you only need to apply once to keep the weeds away for the entire season." |
| Target Pests Multi | Annual Bluegrass, Annual Foxtails, Barnyardgrass, Broadleaf Signalgrass, Browntop Panicum, Carpetweed, Common Chickweed, Common Lambsquarters, Common Purslane, Crowfootgrass, Fall Panicum, Florida Pusley, Goosegrass, Henbit, Itchgrass, Junglerice, Knotweed, Kochia, Large Crabgrass, Lovegrasses, Mouseear Chickweed, Persian Speedwell, Pigweed, Poa Annua, Prostrate Spurge, Rescuegrass, Seedling Johnsongrass, Shepherdspurse, Smooth Crabgrass, Sprangletop, Texas Panicum, Witchgrass, Woolly Cupgrass, Yellow_Woodsorrel |
| Time to Kill | Barricade 4FL Herbicide prevents weed growth within 60 to 90 days after application. |
| Chemical Type | Herbicide |
| Formulation | Suspended Concentrate |
| Application Methods | Broadcast Spray, Spot Treatment |
| Product Drawbacks | Will not be able to eliminate weeds that have already emerged. You will need to use a post-emergent herbicide if the weeds have sprung up. |
| Active Ingredient | Prodiamine 40.7% |
| Application Equipment | Backpack Sprayer, Pump Sprayer, Spray Rig |
| Mix Rate | For turfgrass applications, use 0.5 to 1.1 oz. of Barricade 4FL Herbicide per 1,000 sq. ft. |
| Use Sites | Outdoors |
| Yield | Barricade 4FL Herbicide will cover 261,360 sq. ft. when used at the maximum application rate. |
| EPA Registration No. | 100-1139 |
| Shelf Life | Barricade 4FL Herbicide will last for 3 years when stored in a dry, cool environment away from water, food, or feed. |
| Comparable Products | Dithiopyr 2L |
| Children or pets? | No |
| Property Characteristics | None |
*Price does not include freight. We guarantee our rate plus shipping will be less than anyone else's price.