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MONTEREY

Monterey Once A Year Insect Control II

Monterey Once A Year Insect Control ll is a reliable systemic insecticide that provides year-long insect protection for outdoor trees and shrubs. 

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Monterey Once A Year Insect Control II Product Page
Min : 24.99 - Max : 61.92
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Price as of
02/01/26
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Monterey Once A Year Insect Control ll, manufactured by Monterey, is a easy to apply insecticide that provides internal defense from harmful insects. 

This bug killer product absorbs into the tree and shrub roots the move throughout the plant, providing complete protection and elimination from pests like aphids or Japanese beetles. 

Monterey Once A Year Insect Control ll is a straightforward and effective insecticide that provides year-long control with just one application. 

Tools Needed

Monterey Once A Year Insect Control ll will need to be mixed and applied with a bucket since it is only intended for soil drench applications. 

How to Use

  • Step 1: For trees with one trunk, measure distance (in inches) around tree trunk at chest height. A flexible tape measure is the recommended tool. This is the number of ounces of Monterey Once A Year Insect Control ll to apply. For shrubs, measure the height of the shrub to the nearest foot. Round any inches down to the nearest foot if less than 6” and up to the nearest foot if greater than 6”. Multiply the number of feet by 3 – this is the number of ounces of this product to apply. Use 1 oz. of Monterey Once A Year Insect Control ll per inch of distance around trunk. For shrubs, apply 3 oz. of product per foot of height.
  • Step 2: Fill a bucket or watering can with 1 gallon of water. For trees with circumference greater than 50 inches, use 2 gallons of water. Shake well.
  • Step 3: Slowly pour the solution evenly around the tree. For best results, pour as close to the trunk/main stem of the tree/shrub as possible. Fill the bucket with clean water and pour it around the trunk as well.

Where to Use

Monterey Once A Year Insect Control ll can be used for outdoor residential trees and shrubs, including listed fruit and nut trees.

When to Use

Apply Monterey Once A Year Insect Control ll anytime, except when the ground is waterlogged or frozen. 

During prolonged dry periods, water the tree/shrub well the night before making an application.

Safety Information

Monterey Once A Year Insect Control ll is safe to use around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product.

Keep people and pets out of treated areas until the sprays have dried.

Special Considerations

Do not apply this product, by any application method, to linden, basswood or other Tilia species.

More Information
Restricted Use No
Shipping Restrictions CT, DC, MA, MD, ND, VT, WV
Availability Online
Signal Word CAUTION
Keith's Pro Tip "Prune damaged parts of the trees to help increase the overall health and lessen the amount of energy repairing parts of the tree."
Time to Kill Monterey Once A Year Insect Control ll will take one week to control pests.
Chemical Type Insecticide
Formulation Emulsifiable Concentrate (EC)
Application Methods Drench Treatment
Product Drawbacks Monterey Once A Year Insect Control ll application to trees heavily infested may not prevent their eventual loss due to existing pest damage and tree stress.
Active Ingredient Imidacloprid 1.47%
Application Equipment Gloves
Mix Rate Use 1 oz. of Monterey Once A Year Insect Control ll per inch of distance around trunk. For shrubs, apply 3 oz. of product per foot of height.
Use Sites Outdoors
Yield N/A
EPA Registration No. 228-525-54705
Shelf Life Monterey Once A Year Insect Control ll will last for 3 years when stored in a dry, clean area and avoid excess heat.
Children or pets? No
Property Characteristics Food-Bearing Plants
AvailabilityOnline
Restricted UseNo
BrandMONTEREY
Keith's Pro Tips"Prune damaged parts of the trees to help increase the overall health and lessen the amount of energy repairing parts of the tree."
Product DrawbacksMonterey Once A Year Insect Control ll application to trees heavily infested may not prevent their eventual loss due to existing pest damage and tree stress.
Target PestsAphids, Vine Weevil Larvae, Borers, Adult Japanese Beetles, Lacebugs, Leaf Beetles, Leafhoppers, Leafminers, Mealybugs, Pine Tip Moth Larvae, Psyllids, Royal Palm Bugs, Sawfly Larvae, Scales, Thrips, and Whiteflies.
Application EquipmentGloves
Application MethodsDrench Treatment
Active IngredientImidacloprid 1.47%
Product TypeInsecticide
FormulationEmulsifiable Concentrate (EC)
Application RateUse 1 oz. of Monterey Once A Year Insect Control ll per inch of distance around trunk. For shrubs, apply 3 oz. of product per foot of height.
Shelf LifeMonterey Once A Year Insect Control ll will last for 3 years when stored in a dry, clean area and avoid excess heat.
YieldN/A
Use SitesOutdoors
Time to KillMonterey Once A Year Insect Control ll will take one week to control pests.
Incompatible Home SidingBrick, Hardie Plank, Stone Veneer, Stucco, Wood, Vinyl
EPA Registration #228-525-54705

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