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OHP
Marathon II Insecticide
Marathon ll Insecticide is a long-lasting, systemic insecticide that provides 3 to 4 weeks weeks of control with foliar applications or up to 12 weeks of protection when applied to the soil, effectively targeting piercing, sucking, and soil-inhabiting pests in greenhouses, nurseries, and interiorscapes.
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Marathon II Insecticide Product Page
Min : 148.46 - Max : 148.46
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Price as of
10/28/25
10/28/25
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Marathon ll Insecticide, manufactured by OHP, is an effective, systemic insecticide concentrate that delivers instant knockdown and up to 12 weeks of control against a broad range of pests on ornamentals, vegetables, and fruiting plants in greenhouses, nurseries, and interiorscapes.
This multi-functional neonicotinoid insecticide contains Imidacloprid 21.4%, which targets the nervous system of pests by disrupting their ability to transmit nerve signals, leading to paralysis and death. It is especially effective against sucking and piercing insects such as aphids, whiteflies, Japanese beetles, and more providing both contact and ingestion control for rapid and long-lasting pest suppression.
Marathon ll Insecticide is an excellent flowable insecticide that tackles common destructive pests on ornamentals, fruit and nut trees, and vegetables. Instead of fighting pests week after week, applicators can apply once and enjoy weeks of protection. It’s that combination of peace of mind, plant safety, and reliability that makes it such a strong choice.
Tools Needed
A handheld pump sprayer, backpack sprayer, hose-end sprayer, spray rig, or chemigation system will be needed.
How to Use
- Step 1: Determine how much Marathon ll Insecticide to use by measuring the square footage of the treatment area. Find the square footage by measuring the treatment area's length and width in feet, then multiply them together (length X width = square footage). For acreage, take the square footage and divide it by one acre (square footage / 43,560 sq. ft. = acres). For ornamentals, apply 0.45 to 0.6 fl. oz. of Marathon ll Insecticide per 2 gallons of water per 1,000 sq. ft. or 1.7 fl. oz. of product per 100 gallons of water. Refer to the product label for specific application rates and restrictions.
- Step 2: Fill the sprayer tank with half the amount of water, add the proper amount of product, and pour in the remaining half of the water. Close the tank lid and shake until well-mixed.
- Step 3: For foliage applications, spray the top and bottom of the leaves until wet. Do not spray to the point of runoff. To make drench applications, spray around the base of the foliage.
Where to Use
Marathon ll Insecticide can be used in greenhouse, nurseries, interior plantscapes, and similar type areas on ornamentals, fruit and nut trees, and vegetable plants.
When to Use
Apply when pests are active or before they appear.
If you do not plan to irrigate yourself, then time applications when rainfall is expected to occur within 24 hours of application.
Safety Information
Marathon ll Insecticide is safe for people 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 the treated area until 24 hours have passed after application.
Special Considerations
Remove plastic or any other barrier that will stop the solution from reaching the root zone for soil drench applications.
| Availability | Online |
| Restricted Use | No |
| Shipping Restrictions * = not registered** = restricted use | 250 mL: CA*, CO**, CT**, MA**, MD**, ME**, NH**, NJ**, NV**, NY**, OR**, RI**, VT**, WA** |
| Brand | OHP |
| Keith's Pro Tips | "Practice crop rotation to break pest life cycles and reduce populations of host-specific insects." |
| Product Drawbacks | This product is highly toxic to bees exposed to direct treatment or residues on blooming crops/plants or weeds. |
| Target Pests | Adelgids, Annual Bluegrass Weevil, Aphids, Apopka Weevil, Armored Scales, Asiatic Garden Beetle, Billbugs, Black Turfgrass Ataenius, Black Vine Weevil, Bronze Birch Borer, Chinch Bugs, Citrus Weevil, Cutworms, Eucalyptus Longhorned Borers, European Chafer, Flatheaded Borers, Fungus Gnats (Larvae Only), Glassy-Winged Sharpshooter, Green June Beetle, Japanese Beetles (Adults), Lacebugs, Leaf Beetles (Including Elm and Viburnum Leaf Beetles), Leafhoppers, Leafminers, May or June Beetle, Mealybugs, Mole Crickets, Northern Masked Chafer, Oriental Beetle, Phyllophaga spp., Pine Tip Moth Larvae, Psyllids, Root Mealybugs, Root Weevil Complex, Royal Palm Bugs, Sawfly Larvae, Scapteriscus spp., Soft Scales, Southern Masked Chafer, Thrips (Suppression), White Grub Larvae, Whiteflies. |
| Application Equipment | Backpack Sprayer, Chemigation System, Hose End Sprayer, Pump Sprayer, Spray Rig |
| Application Methods | Broadcast Spray, Overhead Sprinkler Irrigation |
| Active Ingredient | Imidacloprid 21.4% |
| Product Type | Insecticide |
| Formulation | Suspended Concentrate |
| Application Rate | For ornamentals, apply 0.45 to 0.6 fl. oz. of Marathon ll Insecticide per 2 gallons of water per 1,000 sq. ft. or 1.7 fl. oz. of product per 100 gallons of water. |
| Shelf Life | Marathon ll Insecticide will last for 3 years when stored in a dry, clean area. |
| Yield | 250 ml of Marathon ll Insecticide will cover approximately 14,083 sq. ft. |
| Use Sites | Indoors, Outdoors |
| Time to Kill | Marathon ll Insecticide will create a 3 to 4 weeks residual with foliar applications and up to 12 weeks of protection when applied to soil. |
| Comparable Products | Premise 2, Dominion 2L Insecticide |
| EPA Registration # | 53883-232-59807 |
| Restricted Use | No |
|---|---|
| Shipping Restrictions | CA, CT |
| Availability | Online |
| Signal Word | CAUTION |
| Keith's Pro Tip | "Practice crop rotation to break pest life cycles and reduce populations of host-specific insects." |
| Time to Kill | Marathon ll Insecticide will create a 3 to 4 weeks residual with foliar applications and up to 12 weeks of protection when applied to soil. |
| Chemical Type | Insecticide |
| Formulation | Suspended Concentrate |
| Application Methods | Broadcast Spray, Overhead Sprinkler Irrigation |
| Product Drawbacks | This product is highly toxic to bees exposed to direct treatment or residues on blooming crops/plants or weeds. |
| Active Ingredient | Imidacloprid 21.4% |
| Application Equipment | Backpack Sprayer, Chemigation System, Hose End Sprayer, Pump Sprayer, Spray Rig |
| Mix Rate | For ornamentals, apply 0.45 to 0.6 fl. oz. of Marathon ll Insecticide per 2 gallons of water per 1,000 sq. ft. or 1.7 fl. oz. of product per 100 gallons of water. |
| Use Sites | Indoors, Outdoors |
| Yield | 250 ml of Marathon ll Insecticide will cover approximately 14,083 sq. ft. |
| EPA Registration No. | 53883-232-59807 |
| Shelf Life | Marathon ll Insecticide will last for 3 years when stored in a dry, clean area. |
| Comparable Products | Premise 2, Dominion 2L Insecticide |
| Children or pets? | No |
| Property Characteristics | Food-Bearing Plants |
*Price does not include freight. We guarantee our rate plus shipping will be less than anyone else's price.