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MGK
Onslaught Microencapsulated Insecticide
Onslaught Microencapsulated Insecticide uses controlled-release technology to deliver long-lasting residual control of a broad list of insects. It can be used indoors and outdoors to kill cockroaches, ants, bed bugs, pantry pests, turf insects, and more.
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Onslaught Microencapsulated Insecticide product page
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10/06/25
10/06/25
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Onslaught Microencapsulated Insecticide, manufactured by MGK, is an insecticide concentrate that effectively provides long-lasting residual control of various household pests, including bedbugs and fleas.
Esfenvalerate's active ingredient is enclosed in capsules, and it's released slowly over some time, killing long after treatment.
Another great thing about Onslaught is the different sites on which it can be applied. It can be used indoors, outdoors, and in broadcast treat rugs and carpeting, and it is safe enough to use in food handling areas.
Tools Needed
You can use a backpack sprayer, a handheld pump sprayer, or a spray rig for large-volume applications.
How to Use
- Step 1: Determine how much Onslaught Microencapsulated Insecticide to use by measuring the square footage of the treatment area. To do this, measure the treatment areas' length and width in feet, then multiply them together (length x width = square footage). Onslaught can be mixed at a rate of 0.5 fl. oz. per gallon of water per 1,000 sq. ft. for light infestations or 1.0 fl. oz. per gallon of water per 1,000 sq. ft. For example, if you have a heavy infestation and 3,000 sq. ft. of area to treat, you would need to mix 3.0 fl. oz. of Onslaught in 3 gallons of water.
- Step 2: Shake the bottle of insecticide well before diluting it. Then, fill the spray tank halfway with water before adding the proper amount of onslaught concentrated solution based on your calculations. Add the rest of the water required for the appropriate dilution and agitate the tank before spraying and periodically during applications.
- Step 3: Apply Onslaught Microencapsulated Insecticide as a broadcast surface spray, crack and crevice treatment, or inject into wall voids. After the infestation has died out, you can spray quarterly for continued control.
Where to Use
This product can be used indoors or outdoors in residential, commercial, and industrial infrastructures such as homes, schools, warehouses, office buildings, apartment buildings, theatres, hotels, industrial buildings, motels, kennels, livestock housing, food processing plants, food service establishments, restaurants, supermarkets and grocery stores, transportation equipment, truck trailers, railroad cars, and food manufacturing and warehousing establishments. It is also suitable for use in backyards, lawns, trees, ornamental landscaping, recreational areas, parks, and athletic fields.
For indoor use, Onslaught can be sprayed in cracks, crevices, under appliances, around doors, windows, baseboards, attics and basements.
For outdoor use, Onslaught can be used as a perimeter treatment around homes and other building structures. It can be sprayed around the outside of doors and windows, on patios, porches, barns, in weep holes, and wall voids around plumbing, landscapes, bushes, and wood structures. It can also be injected into slabs of concrete such as driveways or sidewalks.
When to Use
This product has a slow-acting residual insecticide that is also lethal when insects come in physical contact with it. This makes it more effective as a prevention method but can also be used as a treatment method.
The time of day the product should be applied will depend on which outdoor insect is being controlled. Do not make outdoor applications during rainy weather.
Safety Information
Onslaught Microencapsulated Insecticide is safe to use around humans and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product.
Wait until applications are dry before allowing people and pets back into the treated area.
Special Considerations
DO NOT use this product as a fogger or apply it as a space spray. Do not apply it to electrical conduits, junction and switch boxes, motor housings, or other electrical equipment due to the shock hazard from water-based sprays.
| Availability | Online |
| Restricted Use | No |
| Shipping Restrictions | 16 Ounce: CT, SC, VT |
| Brand | MGK |
| Keith's Pro Tips | "Onslaught gives about 90 days of residual control when applied. If you apply it quarterly, you can get year-round control of pests and keep your home bug-free." |
| Product Drawbacks | May require repeated agitation while spraying to keep the mixture suspended. |
| Target Pests | Onslaught Insecticide is used for the control of Alfalfa Caterpillars, American Plum Borers, Angoumois Grain Moths, Annual Bluegrass Weevils, Ants, Aphids, Apple Maggots, Armyworms, Artichoke Plume Moths, Asian Lady Beetles, Bagworms, Balsam Woolly Adelgids, Bed Bugs, Bees, Beet Armyworms, Beetles, Billbugs, Biting Flies, Blow Flies, Blueberry Spanworms, Box Elder Bugs, Cadelles, Carpenter Ants, Carpenter Bees, Carpet Beetles, Carrion Beetles, Centipedes, Cherry Fruit Flies, Cherry Fruitworms, Chiggers, Chinch Bugs, Cigarette Beetles, Clothes Moths, Cluster Flies, Cockroaches, Coding Moths, Confused Flour Beetles, Cowpea Curculios, Cranberry Fruitworms, Crane Flies, Crickets, Cucumber Beetles, Cutworms, Dark Mealworms, Deathwatch Beetles, Deer Flies, Deer Ticks, Diamondback Moths, Dog Ticks, Dried Fruit Beetles, Drug Store Beetles, Earwigs, Elm Leaf Beetles, European Pine Sawflies, Face Flies, Fall Webworms, Filbert Worms, Fire Ants, Firebats, Flat Grain Beetle, Flea Beetles, Fleas, Flies, Fruit Flies, Fungus Gnats, Furniture Beetles, Gnats, Grain Mites, Grain Moths, Granary Weevils, Grasshoppers, Green Cloverworms, Green Fruit Worms, Hickory Shuckworms, Hide Beetles, Horn Flies, Hornets, Houseflies, Imported Cabbageworms, Indian Meal Moths, Japanese Beetles, Lace Bugs, Leaf Feeding Caterpillars, Leaf Miners, Leaf Rollers, Leaf Tiers, Leafhoppers, Lesser Appleworms, Lesser Grain Borers, Lesser Peach Tree Borers, Lice, Litter Beetles, Loopers, Lygus Bugs, Maize Weevils, Meal Moth Larve, Mealy Bugs, Mediterranean Flour Moths, Merchant Grain Beetles, Mexican Bean Beetles, Midges, Millipedes, Mites, Mole Crickets, Mosquitoes, Mosquitos, Naval Orangeworms, Northern Pine Weevils, Old House Borers, Oriental Fruit Moths, painted Lady Caterpillars, Pea Weevils, Peach Twig Borers, Pear Psyllid, Pear Slugs, Pecan Leaf Phylloxera, Pecan Nut Casebearers, Pecan Spittlebugs, Pecan Stem Phylloxera, Pecan Weevils, Pepper Weevils, Periodical Cicadas, Pickleworms, Pillbugs, Pine Chafers, Pine Coreid Bugs, Plant Bugs, Plum Curculios, Powder Post Beetles, Psocids, Red Flour Beetles, Redheaded Pine Sawflies, Rice Weevils, Rindworms, Round-headed House Borers, Rusty Grain Beetles, Salt Marsh Caterpillars, Sap Beetles, Saw-toothed Grain Beetles, Scales, Scorpions, Silverfish, Skippers, Small Flying Moths, Sod Webworms, Sowbugs, Spider Beetles, Spider Mites, Spiders, Spittlebugs, Springtails, Square-necked Grain Beetles, Stable Flies, Stinkbugs, Swarming Termites, Tarnished Plant Bugs, Tent Caterpillars, Thrips, Ticks, Tobacco Hornworms, Tobacco Moths, Tufted Apple Budmoths, Velvet Bean Caterpillars, Walnut Husk Flies, Wasps, Waterbugs, Western Bean Cutworms, Whiteflies, Yellow Jackets, and Yellow Mealworms. |
| Application Equipment | Backpack Sprayer, Pump Sprayer, Spray Rig |
| Application Methods | Broadcast Spray, Crack & Crevice, Injection |
| Active Ingredient | (S)-cyano (3-phenoxyphenyl) methyl-(S)-4-chloro-alpha-(1-methylethyl) benzeneacetate 6.40% |
| Product Type | Insecticide |
| Formulation | Microencapsulated |
| Application Rate | You will mix 0.5 ounce to 1.0 ounce per gallon. For more specific application rates please refer to the label. |
| Shelf Life | Onslaught can last 1 to 3 years in storage when kept in a cool, dry place. |
| Yield | If Onslaught Insecticide is used for treatment of a heavy infestation each pint size bottle will treat an estimated 16,000 square feet. |
| Use Sites | Indoors, Outdoors |
| Time to Kill | Onslaught Insecticide provides immediate results but may take up to several treatments to gain full control of infestation depending on target pest. |
| Comparable Products | Reclaim IT |
| EPA Registration # | 1021-1815 |
| Restricted Use | No |
|---|---|
| Shipping Restrictions | CT |
| Availability | Online |
| Signal Word | CAUTION |
| Keith's Pro Tip | "Onslaught gives about 90 days of residual control when applied. If you apply it quarterly, you can get year-round control of pests and keep your home bug-free." |
| Target Pests Multi | Red Pine Sawflies, Alfalfa Caterpillars, American Plum Borers, Angoumois Grain Moths, Annual Bluegrass Weevil, Ants, Aphids, Apple Maggots, Armyworms, Artichoke Plume Moth, Asian Lady Beetle, Bagworms, Balsam Woolly Adelgids, Bed Bugs, Bees, Beet Armyworms, Beetles, Billbugs, Biting Flies, Blow Flies, Blueberry Spanworms, Boxelder Bugs, Cadelles, Carpenter Ants, Carpenter Bees, Carpet Beetles, Carrion Beetles, Centipedes, Cherry Fruit Flies, Cherry Fruitworms, Chiggers/Red Bugs, Chinch Bugs, Cigarette Beetles, Clothes_Moths, Cluster Flies, Cockroaches, Codling Moths, Confused Flour Beetles, Cowpea Curculios, Cranberry_Fruitworms, Cranberry_Weevils, Crane Flies, Crickets, Cucumber Beetles, Cutworms, Dark Mealworms, Darkling Beetles, Deathwatch Beetles, Deer Flies, Deer Ticks, Diamondback Moths, Dog Ticks, Dried Fruit Beetles, Drugstore Beetles, Earwigs, Elm Leaf Beetles, European Pine Sawflies, Face Flies, Fall_Webworms, Filbert Worms, Fire Ants, Firebrats, Flat Grain Beetles, Flea Beetle, Fleas, Flies, Fruit Flies, Fungus Gnats, Furniture Beetles, Gnats, Grain Mites, Grain Moths, Granary Weevils, Grasshoppers, Green Cloverworm, Green Fruitworms, Gypsy Moth Caterpillars, Hickory Shuckworms, Hide Beetles, Horn Flies, Hornets, Horse Flies, House Flies, Imported Cabbageworms, Indianmeal Moths, Japanese Beetle, Lace Bugs, Leaf Feeding Caterpillars, Leafhoppers, Leafminers, Leafrollers, Leaftiers, Lesser Apple Worms, Lesser Grain Borers, Lesser Meal Worm, Lesser Peach Tree Borer, Lice, Litter Beetles, Loopers, Lygus Bugs, Maize Weevils, Meal Moth Larvae, Mealybugs, Mediterranean Flour Moth, Merchant Grain Beetles, Mexican Bean Beetles, Midges, Millipedes, Mites, Mole Crickets, Mosquitoes, Moths, Navel Orangeworms, Northern Pine Weevils, Old House Borer Beetle, Oriental Fruit Moths, Painted Lady Caterpillars, Pea Weevils, Peach Tree Borers, Peach Twig Borer, Pear Psyllid, Pear_Slugs, Pecan Leaf Phylloxera, Pecan Nutcasebearers, Pecan Spittlebugs, Pecan Stem Phylloxera, Pecan Weevils, Pepper Weevils, Periodical Cicadas, Pickleworms, Pillbugs, Pine_Chafers, Pine_Coreid_Bugs, Plant Bugs, Plum Curculio, Powder Post Beetle, Psocids, Red Flour Beetles, Redheaded Pine Sawfly, Redstriped Fireworms, Rice Weevils, Rindworms, Round-Headed House Borers, Rusty Grain Beetles, Salt Marsh Caterpillars, Sap Beetles, Saw-Tooth Grain Beetles, Scales, Scorpions, Silverfish, Skippers, Sod Webworms, Sowbugs, Spider Mites, Spiders, Spider_Beetles, Spittlebugs, Springtails, Square-Necked Grain Beetles, Stable Flies, Stink Bugs, Swarming Termites, Tarnished_Plant_Bugs, Tent Caterpillars, Thrips, Ticks, Tobacco Chocolate Moths, Tobacco Hornworms, Tufted Apple Bud Moths, Velvet Bean Caterpillars, Walnut Husk Flies, Wasps, Waterbugs, Western Beancutworms, Whiteflies, Yellow Jackets, Yellow Mealworms |
| Time to Kill | Onslaught Insecticide provides immediate results but may take up to several treatments to gain full control of infestation depending on target pest. |
| Chemical Type | Insecticide |
| Formulation | Microencapsulated |
| Application Methods | Broadcast Spray, Crack & Crevice, Injection |
| Product Drawbacks | May require repeated agitation while spraying to keep the mixture suspended. |
| Active Ingredient | (S)-cyano (3-phenoxyphenyl) methyl-(S)-4-chloro-alpha-(1-methylethyl) benzeneacetate 6.40% |
| Application Equipment | Backpack Sprayer, Pump Sprayer, Spray Rig |
| Mix Rate | You will mix 0.5 ounce to 1.0 ounce per gallon. For more specific application rates please refer to the label. |
| Use Sites | Indoors, Outdoors |
| Yield | If Onslaught Insecticide is used for treatment of a heavy infestation each pint size bottle will treat an estimated 16,000 square feet. |
| EPA Registration No. | 1021-1815 |
| Shelf Life | Onslaught can last 1 to 3 years in storage when kept in a cool, dry place. |
| Comparable Products | Reclaim IT |
| Children or pets? | No |
| Property Characteristics | None |
