Merit 75 WP - Questions & Answers

Merit 75 WP is not labeled for bagworms and may not provide you with satisfactory results. We recommend that you choose a product that lists bagworms on the product label such as Talstar P (Talstar P is the product most commonly selected by pros for bagworm control), Thuricide, Mavrik, or Permethrin SFR. Please take a few minutes to read our article Bagworm Control to learn when you should start spraying for bagworms.

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.

Yes, Merit 75 WP can be used on ornamentals to treat for leafminers. 

No, Merit 75 WP would not be an effective product to use for carpenter ants in an oak tree.  As an alternative we would suggest using a product called Dominion 2L.

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.

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

Unfortunately most hose end sprayers only work with liquid and not a dry product like merit.  It typically will not mix very well with the water.  Although it does take longer, a hand pump sprayer is much more effective and ensures the product is mixed thoroughly and applied evenly.  We do have many inexpensive back pack sprayers which will allow you to apply 4 gallons of solution at a time fast and efficiently.

Please contact your local cooperative extension office to determine the correct timing of the application as this will vary greatly from region to region. Systemic products such as Merit 75 WP are best applied before pests are a problem because it takes time to translocate throughout the tree.

Per the product label: You would mix Merit 75 WP  at the rate 2 oz per 30 cumulative feet of shrub height.  Soil Drench: Uniformly apply the dosage in no less than 10 gallons of water per 1000 square feet as a drench around the base of the tree, directed to the root zone. Remove plastic or any other barrier that will stop solution from reaching the root zone.

You would need approx. 182 tsp or 30 oz of Merit to treat 130ft os shrub height. Since the label suggest using .7-1.4 tsp per foot of shrub height. You may also want to check out Dominion2l as a lower cost alternative with the same active ingredient.

Merit 75 is not labeled for nematodes so we are not sure if it would provide any type of control for this pest. We would recommend contacting your local cooperative extension office to seek further information on the type of nematode that is infesting certain plants on your property. In most situations you can manage nematode populations without any type of chemical control.

Merit WP can be applied and dried safely when the hummingbirds (or other birds) are not present. 

As stated on the product label, the rate of Merit 75 WP for aphids is 0.25 tsp per 2.5 gallons of water. Please be sure to review the product label for more information and complete application instructions.

When done as a drench, Merit 75 WP can be done annually.

The Merit 75 WP Product Label states that 4 level teaspoons per 1000 sq/ft should be used in sufficient water volume to reach the roots and soil of the lawn. On average this is around 2-3 gallons of water per 1000 sq/ft. 

We can't give an exact measurement for Merit 75 WP, but it is estimated to be around 3 tablespoons.

We apologize that the product is discontinued. Merit 75 WP does offer a rate of 0.25 tsp per 2.5 gallons of water for aphids as directed on the product label. 
 

According to the Safety Data Sheet (SDS) if Merit 75 WP comes in contact with your skin you should take off contaminated clothing and shoes immediately. Wash off immediately with plenty of water for at least 15 minutes. Call a physician or poison control center immediately.

Merit 75 is labeled for both apple crops and Japanese Beetles, however the label is conflicting on if they can be used together . The label does not list Japanese Beetles on apple trees, only Aphids (except Wooly apple aphid) Leafhoppers (including glassy winged sharpshooter leafminer Mealybugs) and San Jose scale. For trees is is recommended to use .7 to 1.4 teaspoons per trunk diameter. You would use 2.3 - 4.5 tsp depending on the strength you are wanting to go. We would recommend you contact the manufacturer directly for reassurance since the label is confilcting. You can contact Bayer at 1-800-331-2867 for further assistance.

The effects when Merit 75 WP - 2 oz. jar is applied off-label will be determined by many different variables.  Please contact Bayer at 800-331-2867 for further assistance in this treatment.