Merit 75 WSP, manufactured by Bayer, is a wettable powder that is effective against turf insects, especially against grubs. This product delivers long-lasting residual control of multiple ornamental pests.

The active ingredient in the formula, imidacloprid 75%, interferes with nerve impulses and disrupts insect behavior. Pests stop feeding, stop reproducing and eventually die.

Merit 75 WSP is an easy to mix product due its powder formulation, which also helps it lasts longer than typical turf insecticides.

Tools Needed

To use Merit 75 WSP, you will need to mix the product in a handheld pump sprayer or backpack sprayer. Spot applications will use handheld pump sprayers while broadcast applications use backpack sprayers.

How to Use

• Step 1: Determine how much Merit 75 WSP to use by calculating the square footage of the treatment area. To do this, measure the length and width of the treatment site in feet and multiply (length X width = square footage). To find acreage, take the square footage and divide it by one acre (square footage / 43,560 = acre). Merit 75 WSP can be used at a rate of 1.6 oz. of product per gallon of water per 8,250 to 11,000 sq. ft. for residential, commercial, and industrial turfgrasses. Outdoor ornamentals will use 1.6 oz. (1 packet) of product per 300 gallons of water or 1.6 oz. of product per 8,250 to 11,000 sq. ft. Broadcast applications to outdoor ornamentals should not use less than 2 gallons of water per 1,000 sq. ft. Do not apply more than 8.53 oz. of product per acre per year.   
• Step 2: Open your Merit 75 WSP packaging and remove the clear inner packet containing the product material. Fill your selected sprayer halfway with the required amount of water, add the appropriate amount of unopened Merit 75 WSP clear inner packets, and then pour in the remaining half of water. Secure the lid to your spray tank and shake to ensure an even agitation. Packets should be completely dissolved within the water before spraying.
• Step 3: Spray the top and bottom of leaves until wet, but not to the point of run-off. Water with an inch or irrigation within 24 hours of application.

Where to Use

Merit is for use in and around residential, commercial, and industrial turfgrasses (including sod farms), landscape ornamentals, fruit and nut trees, interior plantscapes, turfgrasses and ornamentals on residential home lawns, business and office complexes, shopping complexes, multi-family residential complexes, golf courses, airports, cemeteries, parks, playgrounds, and athletic fields. You may also use on holly, pine, ivy, trees, shrubs, evergreens, flowers, foliage plants, groundcovers, and pome fruits, pecans, and grapes grown in residential areas.

Not for use in commercial greenhouses or on linden, basswood, and Tilia species of plants.

When to Use

Merit 75 WSP should be used when you discover turf insects in your landscape soil or if you have notice turf damage due to grubs and other turf pests. Prime times are between Spring and Fall.

Do not use when turfgrasses are waterlogged of the soil is saturated with water. Nor use it when plants are in bloom while bees are foraging the treatment area. To avoid contacting bees, apply in the evening as this is when pest activity is low.

Safety Information

Merit 75 WSP is safe to use around children or pets when used according to product label instructions. Always wear the necessary personal protective equipment (PPE) prior to mixing and applying this product around your property.

Keep children and pets off the treated area until dry. Treated areas should not be used for grazing or have its clippings used for feed or forage.

Special Considerations

Merit can be applied as a foliar spray, soil broadcast spray, soil injection or soil drench. Check the label for detailed directions on how to conduct each application method.

Do not apply Merit 75 WSP Insecticide while bees are foraging or to plants that are flowering. Only apply after all flower petals have fallen off.