Merit 75 WP is labeled to control larvae of European Chafer. You will need to use 6.4 to 8.6 oz per acre or 3 to 4 level teaspoons per 1000 sq. ft. of Merit 75 WP. With 3500 sq. ft, you should use between 10.5 and 14 teaspoons. Make sure you use at least 2 gallons of water per 1000 sq. ft.
When applying an insecticide such as Merit WP, it is important to remember that the water you are using is a carrier, so it is most important that we evenly distribute the correct amount of product for the area in a sufficient amount of water, rather than trying to determine how much product we need per gallon of water. If using Merit WP, you would apply 6.4 to 8.6 ounces per Acre. We suggest using at least 2 gallons of water per 1,000 square feet so that the product is carried into the soil through the thatch layer of the grass. If you have equipment that can mix at least 25 gallons of solution at a time, then we would suggest using the Merit WSP or a generic of it, Adonis WSP. Each envelope comes with 4 water soluble packets, and each packet covers 8,250-11,000 square feet.
Merit 75 WP - 2 oz. would be good for borers but you will be required to water in the application with about 1/2 inch of water. It is also important to keep the soil moist for at least two weeks following the application to help with root uptake.
The Merit 75 WP label does give instructions for applying over 1000 sqft area when treating flowers and ground covers. Apply as a broadcast treatment and incorporate into the soil before planting or apply after plants are established. If application is made to established plants, optimum control will be attained if area is irrigated thoroughly after application.
The Merit 75 WP would be stronger than the Bayer Systemic Rose Care but has the same active ingredient, Imidacloprid.
The label does not specify that it safe for orchids though, so we would recommend confirming with Bayer that it would be safe to apply to them. Bayer can be reached at 1-800-331-2867.
Merit 75 WP is not labeled for use on cherry trees or other edible plants. ImidaPro 4SC is labeled for use for aphids on sweet and tart cherries. The best way to prevent fruit flies is to pick ripe fruit and pick up fallen fruits as soon as possible. You also can use Yellow Sticky Traps around areas where you frequently get high numbers of flying insects.
Per the product label for Merit 75 WP - 2 oz.: Applications should not be made when turfgrass areas are waterlogged or the soil is saturated with water. Adequate distribution of the active ingredient cannot be achieved when these conditions exist. For optimum control, irrigate thoroughly to incorporate MERIT 75 WP Insecticide into the upper soil profile after application. The pH of the water is not important.
Merit 75 WP - 2 oz. does contain Imidacloprid which is also found in other products that are labeled for termites. Merit brand products are formulated and labeled for turf and ornamental applications, not for termite control. If you would like a product containing imidacloprid for termite treatment, then we suggest Dominion 2L.
Yes, you can use Merit 75 WP on trees that aren't infected with anything; however, be aware that there is a limit on how much product you can use per year. As a low cost alternative we recommend Dominion 2L which has the same active ingredient as Merit and treats the same insects. One bottle of Dominion 2L contains enough product for about 137 inches of tree trunk diameter at the highest concentration, where one 2 oz jar of Merit 75 WP contains enough product for about 30 cumulative inches of tree trunk diameter (at the highest concentration for systemic control).
Merit 75 is not actually labeled for squash bugs, but squash bugs that try to feed off of treated plants would surely be affected. Merit 75 is most likely not labeled for squash bugs because it cannot be used on most edible plants which are the ones that will most likely be infested by this pest. We do carry Bayer Advanced Fruit, Citrus and Vegetable Insect Control and while it does share the same active ingredient as Merit 75 the formulation is a bit different which is what allows you to use it on edible plants.
Merit 75 WP is not labeled for use on plum trees. We do sell Monterey Fruit Tree and Vegetable Systemic Soil Drench, which contains the same active ingredient and is labeled for use on plum trees. If you are already finding these insects, you may also consider using a topical knockdown spray such as Fertilome Triple Action Plus.
Adult Japanese Beetles can be treated with Merit 75 WP by spraying the trees. When you apply it systemically, you need to be able to apply the right amount of product per area with enough water, therefore using the product inside the Ross Root Feeders will not be a good idea. Please refer to the product label for Merit 75 WP for complete application instructions. For more information about treating this pest, view our Japanese Beetle Control page.
