4.5 out of 5 Customer Rating
Ortho® Home Defense® Mosquito Kill & Prevent Starter® & Refill Kits - MAIN ID is rated 4.1 out of 5 by 159.
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Ortho

Home Defense Mosquito Kill & Prevent

$47.99
4.5 out of 5 Customer Rating
Ortho® Home Defense® Mosquito Kill & Prevent Starter® & Refill Kits - MAIN ID is rated 4.1 out of 5 by 159.
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Ortho
Home Defense Mosquito Kill & Prevent
$47.99

Enjoy your yard without the buzz and bite. This product uses the Aedes and Culex mosquitos' own behavior to kill existing ones and prevent new ones from developing, creating a 4,300 sq. ft. protection zone around your home.

4615615

Key Features

  • KILLS & PREVENTS MOSQUITOES*: Kills adult mosquitoes* within 9 days and prevents new mosquito* larvae inside the station and at other breeding sites adults visit from developing
  • CREATES A PROTECTION ZONE: Each station creates a 4,300 sq. ft. zone of protection to control mosquitoes* over time, meaning you see less mosquitoes* as the season goes on
  • EASY TO USE: Simply add water to the station, add a refill band, and place it in a shaded area; there are no flames, no sprays, and no batteries needed

*Aedes & Culex spp.

Mosquitoes* are a natural part of the ecosystem, but they don't have to be a part of your backyard party. We get it—you want to enjoy the outdoor space you love without being bothered. Ortho Home Defense Mosquito Kill & Prevent is designed to give you that peace of mind. This station works with a mosquito's* natural instincts. It attracts them by mimicking an ideal breeding site where they become contaminated with a dual-action formula. When they fly off to other breeding spots, they spread the formula, preventing new larvae from developing and controlling mosquito* populations over time. The adults die within 9 days. It’s a clever way to let mosquitoes do the work for you. It's simple to set up, requires no flames or batteries, and creates a 4,300 sq. ft. protection zone so you and your family can get back to enjoying your yard.

*Aedes & Cules spp.

Active Ingredients: Pyriproxyfen and Beauveria bassiana strain GHA

Type of Applicator: Starter Kit (one station plus 2 bands)

Coverage: Up to 4,300 sq. ft.

SKU: 4615615

Product Label

Safety data sheet can be found at: https://www.scottsmsds.com

Where to Use: Use outdoors in shaded areas near bushes, trees, or along property lines where mosquitoes tend to gather.

Where Not to Use: This product is for outdoor use only. Do not use indoors. Do not place stations in direct sunlight, in areas accessible to children or pets, or where they could be washed into bodies of water.

When to Use: Use whenever mosquitoes are active outdoors

How Often to Use: Replace the refill band once a month for continuous protection.

  1. Fill the Base: Remove the station locking cap, lid, and floater from the base. Fill the base with clean tap water up to the fill line (about 1 gallon). Place the filled station in its final, shaded spot in your yard.
  2. Prepare the Refill: Shake the refill package. Open it carefully and remove the refill band. Pour any remaining powder and tablets from the package into the water.
  3. Assemble the Unit: Place the refill band onto the floater and gently place it on the water inside the base—be sure the band stays dry. Place the lid on the base and push down until it clicks. Set the current month on the cap and place it on the lid.
  4. Maintain the Station: Check the water level periodically and top it off as needed. Replace the refill band every month to continue the protection.
  • Find the Right Spot: For best results, place the station in a shaded area near bushes, trees, or the edges of your property where mosquitoes tend to gather.
  • Remove Standing Water: Help reduce breeding grounds by removing or emptying other sources of standing water in your yard, like unused containers, flower pots, or plastic caps.
  • Kids & Pets: Do not allow children or pets to play with the station. Place stations in areas where they cannot be accessed.
  • Handle With Care: This product causes moderate eye irritation. Avoid contact with eyes or clothing. We recommend wearing waterproof gloves when handling the refill bands.
  • Wash Up: Be sure to wash your hands thoroughly after handling the product and before eating, drinking, or using the toilet.

See It In Action

Frequently Asked Questions

How do I store leftover product?

Keep the refill packet in its tightly closed original container when not in use. Store it in a cool, dry, well-ventilated area away from children and animals. For best results, store below 73°F and avoid direct sunlight and heat.

A used refill band and any leftover powder can be disposed of in the trash. The used water in the station should be poured onto the ground, away from sewers or drains. The empty station can then be placed in the trash.

This product only works on Aedes and Culex mosquitoes. These two mosquitoes are known to transmit West Nile and Zika viruses.

When used as directed, the product poses minimal risk to people, pets, and wildlife. You should always place the station in an area that is not easily accessible to children or pets. Do not allow them to play with the station. The active ingredients are contained within the device, and the formula is specifically targeted to kill mosquitoes and their larvae. Following all label directions will ensure you are using the product safely.

The station uses a dual-action formula with two main ingredients to break the mosquito life cycle. Together, these ingredients work to both kill existing mosquitoes and prevent new ones from emerging:

Pyriproxyfen: This is the ""prevent"" ingredient. It acts like a form of birth control for mosquitoes, preventing larvae from developing into biting adults. The contaminated mosquitoes carry this ingredient to other breeding sites, stopping the problem from spreading.

Beauveria bassiana: This is a natural fungal agent and the ""kill"" ingredient. Mosquitoes that enter the station pick up the fungal spores, which ultimately kills them within 9 days.

This product works over time, targeting the mosquito breeding cycle. You won't see dead adult mosquitoes in the station. A noticeable reduction in the mosquito population should be seen within 2 to 3 weeks, with significant results appearing in about a month.

You may see mosquito larvae wiggling in the water while you're checking the station. Don't be concerned; the formula will prevent them from developing into biting adults.

Rated 5 out of 5 by from Definitely works! These refills are so easy to use! Just put the tablets in the water and place the band on! It’s that easy. You can wear gloves to put on. It does work and has kept down the mosquitoes around my door. I was happy they sent refills and I will buy new ones when I run out. If you have a problem with mosquitoes try this set up!
Date published: 2026-07-24
Rated 5 out of 5 by from It absolutely works! This was very easy to set up! I was very excited to put this near the door where mosquitos are the worst! I love how you just put water in and add the tabs in. One great thing about it is the dial on the top to show which month you added it last! It absolutely does work. I noticed I could sit out where I always sit and not be miserable from the mosquitos. I will absolutely continue to use this and buy refills when I run out of the ones sent. It is contained to where my animals can’t get into it and it’s so simple to do. Great product and it works!
Date published: 2026-07-24
Rated 5 out of 5 by from Protect your relatives from diseases, your gardens and the whole house. The Ortho Home defense Mosquito Kill & Prevent system is the best option to keep mosquitoes away both outside and inside you go and more so in these summer days it can also be used anywhere in the house since it covers 4,300 square feet of coverage. Basically what this product does is attract mosquitoes to contaminate them and when they have contact with other places that eliminate the Larva in other breeding grounds thus preventing its spread, it only requires water and changing the refills occasionally. It decreases the risk of a mosquito that spreads dengue, Zika or some other disease entering the house, which gives it added value since in this way we protect our loved It is easy to store since it has an adequate size and is easy to clean and replace, you can place it on your patio, on the terrace or balcony.
Date published: 2026-05-26
Rated 5 out of 5 by from Refills for Mosquito Defense These refills are easy to swap out with the old ones. They work great and I’m thrilled with the way my mosquito population has been decimated. It takes a minute for it to start working but it works well so I have no complaints. They’re small and easy to dispose of. Very impressed with the whole system.
Date published: 2026-05-25
Rated 5 out of 5 by from Great for summer Works great. Takes a while for the mosquitos to disappear but I’d recommend putting it out early in the season before you’re outside a lot just to get a jump start. The refills are easy to use and I’ve seen a huge drop in the mosquitos around our front porch area. Now I can sit on my porch and enjoy a book with no little biting menaces. Love it.
Date published: 2026-05-25
Rated 5 out of 5 by from great for summer this is great for when gathering outside for the summer it’s keeps all the bugs and mosquitoes away. i get easily bit which sucks but hopefully this can help with that. easy to read instructions as well!
Date published: 2026-05-19
Rated 5 out of 5 by from Great Option I received the product for free in exchange for my review. I love that it came with refills kits option so i don't have to buy new container every time when the bands expire in one month
Date published: 2026-05-19
Rated 5 out of 5 by from Great 2 pack! Living in Texas, mosquito control is something we have to stay on top of constantly, so the Home Defense Mosquito Kill & Prevent Refill Kits 2 Pack has been really helpful for keeping our mosquito station working effectively. I've been using these refills consistently, and l've definitely noticed fewer mosquitoes hanging around our backyard and patio areas over time. What I like most is how easy the refill process is. It only takes a few minutes to swap everything out, and I appreciate that there are no strong chemical smells, sprays, or loud devices involved. The system quietly works in the background, which makes it much more convenient for everyday use. The 2 pack is also nice because it gives us coverage for a couple of months without having to constantly reorder. In Texas heat and humidity, mosquitoes can get out of control fast, especially after rain, but these refills have helped make being outside much more enjoyable for my family. It's not an instant overnight solution, but with regular maintenance, l've seen a noticeable reduction in mosquitoes around our home. Definitely worth it if you already use the Home Defense mosquito station system.
Date published: 2026-05-18
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