5 out of 5 Customer Rating
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Ortho® Home Defense® Backyard Mosquito and Bug Killer Ready-To-Spray

5 out of 5 Customer Rating
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Ortho® Home Defense® Backyard Mosquito and Bug Killer Ready-To-Spray

  • Kills mosquitoes that may transmit the Zika Virus
  • 3 month protection (applies to ants, fleas, American dog ticks, and spiders excluding black widows)
  • Starts killing within minutes
  • Treats up to 5,300 sq ft
  • For use on lawns, around home perimeter, ornamentals, flowers, trees, shrubs, vegetables and fruit trees

Active Ingredients

  • 0.3% Bifenthrin, 0.075% Zeta-Cypermethrin


  • Harmful if swallowed. Causes moderate eye irritation. Avoid contact with eyes or clothing. Wear long-sleeved shirt and long pants, socks, shoes, and gloves. Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco, or using the toilet. Prolonged or frequently repeated skin contact may cause allergic reactions in some individuals.

Disposal Methods

  • If Empty: Do not reuse or refill this container. Place in trash or offer for recycling if available.
  • If Partly Filled: Call your local solid waste agency for disposal instructions. Never place unused product down any indoor (including toilet) or outdoor (including sewer) drain.

Product Label

  • This is not the product label. Always read and follow the product label before use.
  • Download Label

  • Safety Data Sheets can be found at scottsmsds.com

Ortho® Home Defense® Backyard Mosquito and Bug Killer Ready-To-Spray allows you to protect your lawn and landscape from mosquitoes that may transmit diseases like Zika and West Nile, as well as ticks, fleas, and over 200 other insects. Just hook it up to your hose and spray following label directions.

How to Use

  • Connect sprayer to hose.
  • Turn on water.
  • To begin spraying, slide lever to the ON position.
  • Spray only until the surface of leaves is wet. Apply evenly.
  • To stop spraying, slide lever to the OFF position.
  • Turn off water.
  • Relieve the water pressure by sliding the lever to WATER.
  • After water slows to a drip, slide the lever to the OFF position.
  • You can now disconnect the hose.

Where Not to Use

  • All outdoor applications must be limited to spot and crack-and-crevice treatments only, except for the following permitted uses:

1. Treatment to soil or vegetation around structures

2. Application to lawns, turf, and other vegetation

3. Application to building foundations, up to a maximum height of 3 feet.

Where to Use

  • Roses and other ornamentals
  • Listed vegetables and fruit trees (see label)
  • Trees and shrubs
  • Lawns
  • Around house foundations, porches, patios and stored lumber

When to Apply

  • Apply when insects first appear.

How Often to Apply

  • Roses, trees, shrubs: every 7-14 days, as needed
  • Foundation: every 7-14 days
  • Lawns: 4-6 weeks
  • Edibles: every 7 days, as needed

Frequently Asked Questions

Mosquitoes--Malaria, Northern House, Yellowfever, including those that may transmit the Chikungunya virus, yellow fever, dengue fever, encephalitis, West Nile Virus and Zika Virus)

Adelgids--Eastern Sprucegall

Ants--Argentine, Carpenter, Harvester, Imported Fire, Lasius, Odorous House, Pavement, Pharaoh/Sugar, Pyramid

Aphids--Apple, Black Cherry, Black Pecan, Buckhorn, Greenbug, Pea, Root, Rose, Rosy Apple, Walnut, Yellow Pecan

Beetles--Bean leaf, Billbugs (Bluegrass), Cucumber (Banded, Spotted & Striped), Black Turfgrass Ataenius, Blister, Brown Leaf Notcher, Carpet, Colorado Potato, Corn Rootworm (Mexican, Northern, Southern, & Western), Curculio (Cow Pea & Plum), Elm Leaf, Flea (Black, Dichondra, & Sweetpotato), Ground, Japanese Adult, Ladybeetles, Mexican Bean, Pine Chafer, Pine Shoot, Red Flour, Rose Chafer, Sap, Southern Corn Leaf, Weevils (Annual Bluegrass, Black Vine, Blue Green Citrus Root, Carrot, Cranberry, Diaprepes Root, Little Leaf Notcher, Northern Pine, Orchard, Buckhorn, Greenbug, Pea, Orchid, Pea Leaf, Pecan, Pepper, Pine Shoot, Sweetpotato, Whitefringed


Borers--American Plum, Common Stalk, European Beetles Bean Leaf, Billbugs (Bluegrass), Com, Hop Vine, Lesser Peachtree, Peach Twig, Cucumber(Banded, Spotted & Striped), Black Peachtree, Southern Com, Southwestern Com, Turfgrass Ataenius, Blister, Brown Leaf Notcher, Squash Vine, Stalk



Boxelder Bug

Caterpillars--Alfalfa, Alfalfa Looper, Armyworm (Beet, Fall, Southern, True, & Yellowstriped), Bagworms, Blueberry Spanworm, Budworm, Casebearers (Pecan Leaf & Pecan Nut), Celery Leaftier, Com Earworm (same as Tomato Fruitworm), Cross-Striped Cabbageworm, Cutworms (Black & Western Bean), Filbertworm, Fruitworms (Granberry, Green, & Tomato), Green Cloverworm, Hickory Shuckworm, Imported Cabbageworm, Loopers (Cabbage & Celery), Melonworm, Navel Orangeworm, Orange Tortrix, Painted Lady, Pickleworm, Ringworm, Saltmarsh, Tent, Hornworms (Tobacco & Tomato), Tomato Pinworm, Webworms (Fall, Mimosa, Oak, & Sod), Velvetbean,


Chinch Bugs--False, Hairy, Southern

Cockroaches--American, Asian, Brown Banded, German, Smoky Brown



Fleas--Cat, Dog


Flies--Apple Maggot, Biting Flies, Cherry Fruit, Cornsilk, European Crane, House, Walnut Husk

Fungus Gnats



Lace Bugs

Leaffooted Bugs--Squash Bug

Leafhoppers--Aster/California, Com, Eastern Grape, Glassy Winged Sharpshooter, Potato, Southern Garden, Western Grape

Leafminers--Alder, Boxwood, Holly, Oak, Spruce Needle, Tentiform, Vegetable

Leafrollers--Oblique Banded, Red-Banded, Variegated


Mites--Banks Grass, Broad, Carmine, Chigger, Clover, European, Grain, Pacific Spider, Pecan Leaf Scorch, Pecan Scorch, Red Spider, Spider, Spruce, Two-Spotted Spider

Mole Crickets

Moths--Artichoke Plume, Codling, Diamondback, Gypsy, Luceme, Oriental Fruit, Zimmerman Pine

Periodical Cicadas

Pillbugs & Rollie Pollies

Plant Bugs--Tarnished, Lygus Bugs

Phylloxera--Pecan Leaf, Pecan


Sawflies--European Pine, Redheaded Pine, Rose Slug

Scales--Brown Soft, California Red, Euonymus, Pine Needle, San Jose



Spiders--Black Widow, Brown Recluse, Daddy Long Legs, Hobo, Burrowing Wolf, Pirate Wolf, Thin-legged Wolf

Spittlebugs--Meadow, Pecan

Stinkbugs--Brown Marmorated, Kudzu Springtails



Ticks*--American Dog, Brown Dog, Deer (*including ticks that may transmit Lyme disease)

Treehoppers--Three-cornered Alfalfa Hopper



Wireworms--Corn, Southern Potato


People and pets may enter the treated area after the spray has dried.

Do not allow this product to run-off into storm drains, drainage ditches, standing water, and gutters.

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