Merit 75 WP

5 out of 5 stars 17 Reviews | 69 Q&A

Merit 75 WP

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Average Rating

5 out of 5 stars Rating: 4.9

17 Reviews | 69 Q&A

Product Overview

As a low cost alternative we recommend Adonis 2F which has the same active ingredient as Merit and treats the same insects.

Merit 75 WP is a broad-spectrum systematic wettable powder concentrate which can be used at very low rates and applied as a foliar spray, soil broadcast spray, soil injection or soil drench to control grubs, weevils, and other soil and turf inhabiting pests. Soil applications are taken up by plant, ornamental, and tree roots into twigs, stems, and foliage. Merit 75 WP includes detailed instructions for application to turfgrass, ornamentals, trees, shrubs, flowers, groundcovers, and in and around commercial or residential buildings. All applications recommend the use of a sprayer for application which will produce a uniform, coarse droplet spray when used at a low-pressure setting.

Features and Specs

Active Ingredient: Imidacloprid 75%
Target pests: Chafers, Chinch Bugs, Garden Beetles, Japanese Beetles, Billbugs, Mole Crikets, grubs and others
* See label for complete list
For use in: Turf-grass and Landscape Ornamental Plants
* See label for complete list
Application: Turfgrass: 6.4 - 8.6 oz per acre (3 - 4 tsp. per 1,000 sq. ft.)

Trees, Shrubs, Plants: 1 tsp. per 10 gallons of water
Pet safe: Yes, if used as directed on Label
Formulation: Professional Product
Group 4A Insecticide
NOT FOR SALE TO: CT, MD, NY, SC
Shipping Weight: 0.21 lbs
Manufacturer: Bayer
EPA Registration: 432-1314

Details

Merit 75 WP is a broad-spectrum systematic wettable powder concentrate which can be used at very low rates and applied as a foliar spray, soil broadcast spray, soil injection or soil drench to control grubs, weevils, and other soil and turf inhabiting pests. Soil applications are taken up by plant, ornamental, and tree roots into twigs, stems, and foliage. Merit 75 WP includes detailed instructions for application to turfgrass, ornamentals, trees, shrubs, flowers, groundcovers, and in and around commercial or residential buildings. All applications recommend the use of a sprayer for application which will produce a uniform, coarse droplet spray when used at a low-pressure setting.

Merit can be applied as a root/soil drench. Insecticides applied to the soil are taken up by the roots and translocated throughout the tree or shrub. Root/soil drenches offer the advantage of requiring no special equipment to apply (other than a bucket or watering can). However, surface layers of organic matter, such as mulch or leaf litter, can bind the insecticide and reduce uptake. Before applying drenches, it is important to remove or pull back any mulch or dead leaves so the insecticide solution is poured directly on the mineral soil. It is also important to keep the soil around the tree or shrub moist for the next 7-10 days after applications to encourage uptake.

TREES:

To calculate how much Merit you need to purchase, you will need to measure the diameter of the tree trunk.  You will need 0.7-1.4 level teaspoons of Merit per inch of diameter. The highest rate should be used for all boring insects. The amount of water that is used will vary depending on soil conditions and volumes that are easy for applicators to use. The minimum amount of water that should be used is 1 pint per inch of tree diameter but you may use 1 quart -1 gallon of water per inch as well. Denser soils such as clay do not accept water as readily, so the lower volume of water is suggested.  Since sandy soils can accept more water, using the higher volume of water is preferred.

* Example: If a tree has Emerald Ash Borers the highest usage rate of Merit would need to be used (1.4 level teaspoons per inch of diameter).

If the trees diameter is 11.5 inches you would need about 16 teaspoons (5.5 tablespoons) of Merit. If the tree were in sandy soil you could dilute the Merit with up to a gallon of water per inch of trunk diameter.

In this case you would dilute 16 teaspoons of Merit into about 11.5 gallons of water.

Note: Water simply acts as a carrier and it is important that even distribution of the product is achieved. Thus, more water may be used if the applicator feels runoff will not occur and proper penetration of the root zone is achieved.

SHRUBS:

You will need to use 0.7-1.4 level teaspoons of Merit per foot of shrub height. The amount of water that is used will vary depending on soil conditions and volumes that are easy for applicators to use. The minimum amount of water that should be used is 1 pint per foot of shrub height but you may use 1 quart -1 gallon of water per foot of height as well. Denser soils such as clay do not accept water as readily, so the lower volume of water is suggested.  Since sandy soils can accept more water, using the higher volume of water is preferred.

* Example: If shrubs had white fly you would use the mid- usage rate of Merit (about 1.05 teaspoons per foot of shrub height)

If the shrub height is about 3 feet then you would need 3.15 teaspoons of Merit. If the shrub is located in dense clay you would use the lower volume of water, 1 pint per foot of shrub height.

In this case you would dilute 3.15 teaspoons of Merit in 3 pints of water.

Note: Water simply acts as a carrier and it is important that even distribution of the product is achieved. Thus, more water may be used if the applicator feels runoff will not occur and proper penetration of the root zone is achieved.

Tip: How to treat multiple shrubs

Cumulative feet of shrub height is the total height of all shrubs to be treated. This is determined by estimating the height of all individual shrubs in feet and totaling the sum. With this information, you can correctly mix the appropriate amount of Merit needed for the shrub or foliage plant application.

Example: If you have two shrubs that are 2 feet in height and one shrub that is 5 feet in height you would have 9 feet of cumulative shrub height. Measure the Merit according to the instructions above and apply to the individual shrub according to its own height. For instance if you decided to use 1 gallon of water per foot of shrub height, the shrub that is 5 feet in height would receive 5 gallons of diluted Merit solution and the shrubs that were only 2 feet in height would receive 2 gallons each of the diluted Merit solution.

5 stars   15
4 stars   2
3 stars   0
2 stars   0
1 star   0
  
  • 5 of 5 Stars

    Kills root aphids. Thank you

    By Cb on 06/24/2011

    Our green house had a bad infestation of aphids and particularly root aphids. Did one treatment at 1/4 tsp per gallon. Poured about four cups per container or until very slight run off. 24 hrs later every aphid in the root zone had surfaced and was dead. There must have been thousands of aphids . I could not believe it. I'm sure a foliar spray would definitely knock out any bugs on the foliage as well. This product is systemic so it should hold a good residual in the root zone for a few weeks. The aphids try to come back but die off fairly quickly. Great product but use sparingly as noted.

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    36 of 37 people found this review helpful

  • 5 of 5 Stars

    Merit

    By Chris on 05/03/2011

    Verified Purchase

    I had a terrible problem with Boxwood Leafminers and tried everything under the sun to try to eradicate them. I used Merit as a soil drench on about 150 boxwoods that were infested. One treatment did the job for me and now my boxwoods look spectacular. I really liked this product.

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    20 of 21 people found this review helpful

  • 5 of 5 Stars

    Great stuff

    By Dk on 07/05/2012

    Verified Purchase

    Knocked the mealy bug in orchids due to the fact I could dunk the pot and get those bugs hiding out in the media. Now I am using it as a soil drench on ornamentals as well and it knocks mealy dead. About to order my second bottle.

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    9 of 9 people found this review helpful

  • 4 of 5 Stars

    merit 75 wp - 2 oz. jar

    By Bill on 05/13/2012

    Verified Purchase

    Seams to do what it claims but time will tell. It would be nice if a measuring spoon was incorporated into the jar.

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    8 of 11 people found this review helpful

  • 5 of 5 Stars

    perfect for so much

    By Landscape on 01/18/2013

    Verified Purchase

    You can't beat Merit for preventing and treating so many pests and diseases. Mixes well with water and is easy to use as a drench. NO spraying! I use it every spring for all my client's yards to avoid many problems down the line. Using it every year has virtually eliminated problems with boxwoods, laurels and so many more shrubs.

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    8 of 8 people found this review helpful

See all 17 customer reviews

Questions & Answers

Have a question about this product?
  
Q
How much Merit insecticide do I need?

I am a bit confused about how much product I would need. I have used Bayer Advanced and they ask for the distance around the tree and then to use 1oz per inch of distance. These instructions are quite different with this product. You have me dividing that distance(circumferance)to get the diameter. According to your formula I have 7 trees with a combined DBH of 82.72. Which at a rate of 1.4 tsp would mean about 116 teaspoons. So how many teaspoons are in the 2oz jar of product.

A

One 2oz jar of Merit WP contains enough product for about 30 cumulative inches of tree trunk diameter (at the highest concentration for systemic control). These small 2oz jars are usually purchased by people who only have to treat one or two trees or shrubs. When you need to treat several trees the Merit 75WSP envelope is usually the way to go. One envelope of the Merit 75WSP contains enough product for about 96 cumulative inches of tree trunk diameter at the highest concentration. 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.

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34 of 42 people found this answer helpful

Q
To spray the foliage of shrubs, how much Merit 75 WP to a gallon of water spraying for Aphids?
A
Using Merit 75 WP for the treatment of Aphids as a foliar spray you mix 0.7 to 1.4 level teaspoons MERIT 75 WP Insecticide per foot of shrub height or 1 to 2 ounces per 30 cumulative feet of shrub height. Below is the recommended application dosage rates for Merit 75 WP MERIT 75 WP
(Level Measure)                       (Water)
0.25 tsp.                               2.5  Gallons
0.5 tsp.                                 5.0 Gallons
1 tsp.                                  10.0 Gallons
2.5 tsp.                               25.0 Gallons 
5 tsp.                                  50.0 Gallons
3 Tbsp. + 1 tsp.                  100.0 Gallons

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25 of 29 people found this answer helpful

Q
How do I drench apply Merit 75 to treat Bronze Birch Borer?

Do I dilute one package (1.6 oz) into 10 gallons of water and pour it around the tree? The instructions are not complete clear.

A
We agree, the directions can be very confusing. You will dilute the 1.6 oz pack in at least 10 gallons of water and pour the dilution around the base of the tree. You will need to use 1.6 oz (1 packet) MERIT 75 WSP per 24 to 48 inches of trunk diameter.

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22 of 23 people found this answer helpful

Q
How do I use Merit 75 WP for emerald ash borer control on two trees?

I have been told by your expert that Merit 75 WP is the product to use as a drench for protecting 2 trees that I have from the emerald ash borer. What quantities, and what dilution rate do I need for a tree that is 10 to 12 inches in diameter?

A
The Merit 75 WP product label is one of the most confusing of all the products that we sell.  You need 1.4 level teaspoons of Merit per inch of diameter. This is the highest rate and should be used for all boring insects. The amount of water that is used will vary depending on soil conditions and volumes that are easy for applicators to use. The minimum amount of water that should be used is 1 pint per inch of tree diameter but you may use 1 quart -1 gallon of water per inch as well. Denser soils such as clay do not accept water as readily, so the lower volume of water is suggested.  Since sandy soils can accept more water, using the higher volume of water is preferred.

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21 of 21 people found this answer helpful

Q
I have a problem with grubs in my lawn. What kind of spray works best to kill them?
A

Merit, or the active ingredient in Merit, Imidacloprid, is the best product for grub control. It is important to start treatment prior to egg hatch. For optimum control irrigation or rainfall needs to occur within 24 hours of the application to move the product through the thatch layer and into the soil. You can contact your local cooperative extension office to see when egg hatch normally occurs in you region. Dominion 2L contains the same active ingredient as Merit and can be used as a money saving alternative.

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16 of 27 people found this answer helpful

See all 69 customer questions

Merit 75 WP 5 out of 5 stars Rating: 4.9 (17 Reviews / 69 Q&A)

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