• Foliar Spray
  • Soil Drench

Protect your trees from Emerald ash borer and other invasive pests.

Optrol™ is a broad spectrum insecticide used to control a wide variety of insect pests including emerald ash borer, Japanese beetle, and Asian longhorn beetle.

The liVisit us at booth 3101!quid formulation comes in easy-to-pour, soil applied homeowner kit that can easily be applied without wounding the tree. Optrol™ provides season long control and research proven protection against the most difficult tree pests.

Note: A treatment of Optrol™ lasts for one season. To ensure proper tree health, Optrol™ should be applied once every year. 

Application Type(s)

Foliar Spray,Soil Drench

Active Ingredient

21.4% Imidacloprid


Applications of Optrol™ can be made anytime during the growing season as long as the ground is not frozen or saturated with water. Spring or fall treatments are recommended to ensure full protection during high pest activity.

Note: This product cannot be sold in the following states: AL, AK, AZ, CA, CO, CT, DE, DC, FL, GA, HI, ID, KS, LA, MA, MS, MT, NE, NH, NJ, NM, NV, NC, ND, OK, OR, PR, RI, SC, SD, TX, UT, VT, VA, WA, WY SHIPMENT TO CANADA: Due to regulations governing pesticide use in Canada, we can ship Optrol to your door. Canadian customers will be required to pay duties, customs fees, and taxes c.o.d. The shipment will come via UPS ground. As with all Tree Geeks orders, shipping costs are included on your invoice. . We apologize for any inconvenience this may cause.

Optrol is available in the following sizes/variations.

The Tree Geek

Optrol (1122)
Optrol 8 ounce
Price: $50.12

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The Tree Geek

Optrol Quart (1101)
Quart comes in 4 - 8oz bottles of Optrol
Price: $150.36

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The Tree Geek

Optrol Canada (1122-Canada)
Canadian customers select this option (limit one per shipment)
Price: $68.12

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Not all products are available for sale in all states.  Make sure that any product you intend to purchase is registered for use in your state, and that you have all of the required licenses to apply the product purchased.  Any recommendations made by the tree geek website or its employees are based on limited knowledge of your area and are for informational purposes only.  Always seek advice from a local professional if you are not sure of your tree or pest identity.

What Customers Are Saying...

Average Customer Rating for Optrol

8 Responses to Optrol

  1. Robert Erickson says:

    How much Optrol do I need to purchase for a one time application per tree ? I have four mature (40 year old) Ash trees which so far do not show any signs of being infected with Ash Borer.

    • The Tree Geek says:

      The amount you’d need would depend on the size of the trees in question. We measure dosages based on the tree’s diameter at 4.5 feet above the ground. One bottle of Optrol treats 20 diameter inches.

    • The Tree Geek says:

      It depends on the product, We have products like Xytect 2F, 75WSP and Optrol which would work better in the spring or falls, and Transtect which would work better in the early summer/ late spring. Which one you go with would depend on the level of infestation in the tree, the current infestation pressure around the tree, and when you would prefer to treat.

  2. White birch says:

    I have been applying Optrol in every March for 4 years for my white birch tree. Could I apply Optrol twice a year, like one more time in September? Or could you please recommend any other products? My white birch has been doing good, but I see a little loss of the top leaves this year. These couple of years I have been witnessing ALL other white birch trees around my area died and disappeared, none left other than mine. I know Optrol has been protecting my tree very well, but I would like to have a full protection.

    • The Tree Geek says:


      It is not recommended to treat trees other than the suggested label rate. Some dieback is expected in years of heavy insect pressure, but if you maintain tree vigor it should have no problem bouncing back.

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