Barricade 4FL Herbicide, manufactured by Syngenta, is a flowable suspended concentrat pre-emergent herbicide that offers for 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 in advance to 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 acoording to the product label instructions.

Tools Needed

To use Barricade 4FL Herbicide, 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 calculating 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 1,000 sq. ft. This product may be applied more than once a year as long as total amount is not greater than maximum application rate for each turf grass species. Wait until 60 days have passed after seeding or until second mowing, whichever is longer, before applying this product. Refer to the product label for specific application rates.
• Step 2: Fill a hand-pump sprayer 3/4th of the way with water and then mix in measured amount of Barricade 4FL Herbicide. Fill the sprayer the rest of the way with water and agitate the sprayer until 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 put 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. Reapply as according to the product label to control weeds before they emerge.

Where to Use

Barricade 4FL Herbicide can be used on established turfgrasses (excluding golf course putting greens), lawns, and sod nursuries. In 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

Barricade 4FL can be applied in the 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 that are recommended and good to be used 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 any other granular material.

To avoid grass injury, do not apply Barricade 4FL Herbicide to creeping bentgrass mowed at less than 0.5 inch in height.