Merit 75 WP

5 out of 5 stars 17 Reviews | 71 Q&A

Merit 75 WP
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$36.20

Buy 2 or more: $35.69 each

Buy 6 or more: $35.68 each

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Average Rating

5 out of 5 stars Rating: 4.9

17 Reviews | 71 Q&A

Product Overview

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 ME, CT, MD, NY, SC
Shipping Weight 0.21 lbs
Manufacturer Envu (Formerly 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.

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  • 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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    39 of 40 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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    21 of 22 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

  • 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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    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

See all 17 customer reviews

Questions & Answers

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Q
How often per year should I apply Merit? Addressing Zimmerman Pine Moths
A
When using Merit 75 WP applications cannot exceed a total of 8.6 oz (0.4 lb of active ingredient) per acre per year. 

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Q
What is the best time of year for Merit 75 WP soil drench for Japanese beetles?

Have 2 large lindens being eaten by Japanese Beetles. We are having grub control put down. For Merit, what is the best time to put that down, I read whenever the trees are growing but is there a time that is best, spring, summer, fall? Also they seem to be liking a new Elm we just planted, very young tree, will Merit be OK on that?

A

Japanese Beetles feed on grass roots until late September when cool soil temperatures cause larvae to move downward into the soil to overwinter. Development is completed the following spring. One generation occurs each year. It is important to start treatment prior to egg hatch. For optimum control when apply Merit 75 WP, irrigation or rainfall needs to occur within 24 hours of the application to move the product through the thatch layer and into the soil. Please refer to the product label for complete application instructions. You can contact your local cooperative extension office to see when egg hatch normally occurs in your region. 

 

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2 of 4 people found this answer helpful

Q
We bought Merit 75 about two or three years ago

We had great luck controlling ground pearls on backyard tifgreen grass. We just found out ground pearls are back, but can't find mixing instructions that used to be attached to bottle. Could you please help us with that.

A
You can find the Merit product label on our website on the Merit 75 WP product page. For your convenience we have also linked the product label in our answer : Merit 75 WP product label

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Q
What time of year should Merit 75 WP be applied to kill boring insects in globe locust trees?

Location: St. Louis, MO. Plan to use soil drench method. Thinking about using this product now (early November, if it'll do any good) and Safari via basal trunk application in spring.

A
Merit should be applied when the tree is actively growing. If you try to apply a systemic product like Merit to the root system when the tree has gone dormant it will not be able to trans-locate through the tree. Instead you should consider using a topical product such as Tengard to stop new insects from invading the tree. Tengard can be sprayed on the bark and the foliage to kill exposed insects before they invade the tree.

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Q
What time of year do I apply Merit 75 WSP for bronze birch borer? Will it kill the larvae in the tree already?
A


Please contact your local cooperative extension office to determine the correct timing of the application as this will vary greatly from region to region.  Per the product label for Merit 75 WP: Application to trees already heavily infested may not prevent the eventual loss of the trees due to existing pest damage and tree stress.  Since it can take up to 8 weeks to translocate it can take time to kill the larvae and works best applied before an infestation.

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2 of 3 people found this answer helpful

Q
How long will a diluted solution of Merit 75 WP last?

I would like to make up a spray bottle of Merit 75 WP for use on orchids whenever I find scale. Will this work or does it break down fast?

A
We apologize, we recommend to use to Merit 75 use all mixed solution within 24 hours of mixing. Shelf life in of product original container is 2 years. 

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Q
Can Merit 75 WP be used on trees that are not infected by anything?
A

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).

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0 of 1 people found this answer helpful

Q
Can I use Merit 75 WP Insecticide to control bagworms?

I have about 300 Leyland Cypress trees around two sides of our property (40+ feet tall). Have been spraying once/year with Isotox (Orthene) to control Bag Worms. Can no longer purchase that product. Can I use Merit for this purpose, and if so, approximately how much would I need - ounces/gallon?

A
Merit 75 WP is not labeled for bagworm control. We recommend using Talstar P for bagworm control. Timing is key when spraying for bagworms. Apply when larvae begin to hatch and spray larvae directly. Applications when larvae are young will be most effective. You can check with your local Cooperative Extension Office to see when bagworms become active in your region.

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5 of 5 people found this answer helpful

Q
Can I use Merit 75 on cherry trees?

Right now I have black cherry aphids on one of my cherry trees and I would like to use merit 75 in a collar spray. In what concentration should I apply? I've also heard it may work on fruit flies I've been getting the last few years. How do I apply for fruit flies and what's the minimum interval from harvest?

A

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.

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Q
How soon can I use Merit 75 WP after Talstar application?

I live in Gainesville Florida and I applied Talstar P liquid to my lawn and I am not seeing the results I had in years past; the chinch bloom continues to spread and fast. The local extension office is reporting Chinch bugs have developed an immunity to Bifenthrin in my region. I need a quick knock down and decent residual product.

A
You can use the Merit as soon as you would like as the Bifenthrin and Imidacloprid will not have any adverse reactions being used together.

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Merit 75 WP 5 out of 5 stars Rating: 4.9 (17 Reviews / 71 Q&A)

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