Merit Soil Root Injection



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Preventative Control for Emerald Ash Borer

The introduction of the Emerald Ash Borer into Colorado had made services like Merit soil injection a vital component in preventing damage or death to ash trees.

Merit is a good practice when insect pressure on trees is an annual problem or if their potential presence could be life threatening to the tree. Merit is a systemic insecticide and is injected into the soil around the canopy of the tree. The product is picked up via the root system and pushed through the tree into the leaf tissue. When injected as a soil drench the insecticide won't pass through the abscission layer of the tree and therefore is not harmful to beneficial insects like lady bugs, lacewings nor honeybees.

Merit takes 4-6 weeks to push the insecticide into the upper and outer branches of the tree and Merit will protect the tree tree from many harmful tree insects for up to 1 year. Merit will give season long insect control and prevention, but it must be applied at least 4-6 weeks prior to the threat of insect pressure.

Note: Merit does control a wide spectrum of insects, but it does not control spider mites. Some of the tree insects that Merit does control include aphids, curl aphid, mealy bug, leafminers, bronze birch borer, elm leaf beetle, elm scale, honeylocust plant bug, juniper scale, kermes scale, cottony maple scale, oystershell scale, ash sawfly and many other insects. Merit will prevent emerald ash borer attacks, but it will not kill emerald ash borers if they are already in the ash tree.

The ideal time to apply Merit is in September, but it can be applied as late as October. We prefer fall tree care applications because the insecticide will protect the tree for the following year. For customers that missed the fall insect control application, we do applications in late March through the middle of April. It is best to treat trees early in the seasone because scheduling can be backed up in April.

Ash Curl Aphid

This ash tree is being attacked by the wooly ash aphid. These aphids make the leaves curl and become distorted.

Important Note about Honeybees: We understand that Merit is Imidacloprid and in the neonicotinoid family of pesticides. We understand that neonicotinoids are highly toxic to honeybees and we greatly care about the safety of honeybees. We have researched the use of Merit as a soil injection and have found no evidence that when used as a soil injection that the honeybees come in contact with the insecticide Imidacloprid.

The reason for this is because Imidacloprid cannot penetrate the abscission layer of the tree and therefore cannot get into the flower nor pollen of the tree. If we find scientific evidence that states otherwise we will discontinue the use of this insecticide.

Options Other Than Neonicotinoids: If you are concerned about the use of neonicotinoids and their toxicity on honeybees then we suggest considering Orthene as an option for control of damaging insects on trees.

Note: Orthene does not control all of the same insects that Merit will control so consult our office before ordering this service. Boulder (303) 499-2000 or Fort Collins (970) 225-9425.

Merit is registered under the EPA Reg. NO. 432-1318 and is 75% Imidacloprid and 25% Other Ingredients

Honey Bee Tree Care Boulder

Merit Insecticide Root Injection Pricing*

Discounts: $5.00 off orders over $100.00, $10.00 off over $150.00
and $30.00 off over $300.00

Tree Trunk Diameter** - Cost Per Tree

Flowers - $1.25
Small Shrubs 6" or Less - $3.25
Medium Shrubs 6-18" - $6.25
Large Shrubs 18" or Taller - $8.25
1" Tree Trunk Diameter - $10.50
2" Tree Trunk Diameter - $15.00
3" Tree Trunk Diameter - $19.50
4" Tree Trunk Diameter - $24.00
5" Tree Trunk Diameter - $28.50
6" Tree Trunk Diameter - $33.00
7" Tree Trunk Diameter - $37.50
8" Tree Trunk Diameter - $42.00

Additional Inches - Call for Pricing

* Minimum purchase of $75 is required

** Click here to learn how to calculate the diameter of your trees

Ideal Time of Year To Have Merit Applied:

September - Early November or
March - Mid April

Merit FAQ