Meso 4SC Select Herbicide

Meso 4SC Select, manufactured by Prime Source, is a mesotrione-based product known for its broad spectrum of weed control.

Mesotrione is also the active ingredient in the popular herbicide brand Tenacity. Meso 4SC Select contains the same formula and can provide excellent crabgrass control in residential yards. This is important because the EPA has recently banned MSMA (a go-to recommendation for crabgrass control) for homeowner or residential use.

Meso 4SC Select is easy to mix and apply and can kill treated weeds within 2 to 3 weeks of application. Use it when dealing with hard-to-control weeds like nutsedge, clover, crabgrass, barnyard grass, and more.

Tools Needed

This product can be applied with a pressurized hydraulic sprayer, high-volume handgun spray, hand-held pump sprayer, or backpack sprayer.

How to Use

• Step 1: Determine how much Meso 4SC Select to use by measuring the square footage of the treatment area. Do this by measuring the treatment area's length and width in feet, then multiplying them together (length X width = square footage). The typical application rate is 4 to 8 oz. of Meso 4SC Select per 30 gallons of water per acre for large applications. For smaller areas and spot treatments, a half teaspoon of the product with 1.5 teaspoons of surfactant in 1 gallon of water will treat 1,000 sq. ft. Refer to the product label for specific application rates and restrictions.
• Step 2: Fill a hand-pump sprayer halfway with water, and then add the required amount of Meso 4SC Select to the tank.  Replace the cap and agitate by shaking the sprayer. If needed, add the remaining water required and surfactant, then repeat agitation to ensure that the herbicide solution is thoroughly mixed.
• Step 3: Apply Meso 4SC selectively to the target weed, being careful not to overapply or spray to the point of runoff. Use a fan spray nozzle setting for even coverage. Repeat application in 2 to 3 weeks for best results.

Where to Use

Meso 4SC Select is for use in and around turfgrass, including sod farms, commercial and residential turf, and ornamentals.

When to Use

Use during the growing season when unwanted weeds are growing on the property. The product is best applied when weeds are young and growing. It can also be applied as a fall and early spring pre-emergent.

Safety Information

Meso 4SC Select is safe for children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product.

Pets and children should not be present during treatment and remain out of the treated areas until completely dried.

Special Considerations

Bentgrass, Poa annua, Kikuyugrass, Zoysiagrass, Seashore Paspalum, and Bermudagrass are sensitive to Meso 4SC Select applications. Avoid spraying these turf types unless control and/or injury can be tolerated. A surfactant is recommended with Meso 4SC Select to improve weed control and provide a better stick to the weeds' leaf surfaces.