TERRO Liquid Ant Baits - T1813B - Outdoor Ready-to-Use Terro Ant Traps, Kills Household Ants, 12 Stakes

This is the third time I've bought this product for use in my yard. I have tried sprays, granules, and other ant repellants or poison, but I didn't find anything that was as effective as this, not to mention it's easy to use, and works almost immediately. I put about six of these in different areas of my yard and around the flower bed where I had seen the most ant activity. There are no special installation instructions, just cut the corner off the bait package, stick it on the ground, and leave it. The ants will find the bait and track it back to their nest where it kills ants at the source. Because the baits are dark green plastic, they tend to blend in with your grass, so I would recommend putting these out right after you mow and trim your grass, so you're less likely to hit them when you mow. I found a significant reduction in ant activity within just a couple of days, and pretty much no activity after the third day. I just left the baits out for a few more weeks as long as they still had bait in them, and had not filled up with rain. I would not recommend putting these out right before a period of rain, as the liquid bait might be diluted. We don't have pets or children, but I would be concerned about putting them out where they're accessible to children or pets. I don't know what the effects of the liquid would be on them.

I have ants on my 3rd floor’s balcony. I placed about 5 traps in less than 10 minutes, within 20 minutes I had large congregations of 30+ ants per trap, were there used to be only 2-3 ants before. These traps are highly effective attracting the ants to the sugary poison. Tip: I followed the advise of some of the reviews and spill the poison at the mount of the trap (as the trap entrance might get a couple of millimeters off the surface). I don’t know yet if the poison is effective, I will update the review in 1-2 weeks on this. Edit after 10 days of use: The traps killed a lot of ants the first couple of days, unfortunately, I have too many colonies of the large ants everywhere, so it took some effort and perseverance to get rid of them. In my experience, positioning the traps vertically is mostly ineffective, as it is very difficult to have the trap mouth make contact with the wall, those few millimeters off the wall make a big difference, very few ants find their way into the trap. However, if you placed the traps horizontally (on their bellies) and squeeze them a bit to spread 4-6 drops of the poisonous syrup next to the trap mouth, ants will instantly find the sugary poison and start collecting in large numbers around the venomous drops, thus the traps are good, but need to be placed correctly. Even with these strategies, I still have ants after 7-10 days, remember the larger ants are a bit more stubborn than the little ones (and resistant). I live in Florida and ant colonies can get really big here. After 5 days I came home and saw large ant balls on the garage walls, I was able to see them from 10-15 feet, when I came closer, I realized that the Queens had abandoned the nest and were surrounded by other ants (queens were big and have wings) these phenomenon happened almost every day for 4-5 consecutive days, I took advantage of this opportunity and sprayed the queens with Clorox, killing so far no less than 20 queens in 5 days - a testament of how large these nest can get here in Florida. In summary, this product has created a havoc inside the ant colonies, killing a significant number of them every day, including bringing the queens out. Some nest had completely disappeared, while others are about 70-80% gone. Changing the traps after storms, or spreading drops of poison has proveen to be effective. I have killed thousand of ants so far and managed to reduce my (outdoor) ant problem by about 80-90% in ten days. I still give these traps a 5 start rating as the destruction they create on those colonies is impressive. Unfortunately, the amount of colonies and ants I have outdoors is just too ginormous, so for these traps - as good as they are - they need multiple days (or weeks) to completely disseminate all the nests.

The TERRO liquid ant baits for outdoor use do an okay job overall, but they don’t feel quite as effective as they could be. They work, just not as aggressively or consistently as you might expect if you’ve used TERRO products indoors or had really stubborn ant activity outside. On the positive side, the stakes are convenient and easy to use. You simply place them in the ground near ant trails, entry points, or areas where ants are active, and you’re done. There’s no mixing, no mess, and no guesswork. The design keeps the bait protected from rain and pets, which is important for outdoor placement. Having 12 stakes in the package also gives you flexibility to cover multiple problem areas around the yard, patio, or foundation. The liquid bait does attract ants, but not always as quickly or aggressively as hoped. In some spots, ants found the bait fairly fast and activity picked up around the stakes. In other areas, it took much longer for ants to show interest, and some stakes seemed to be mostly ignored. When ants do feed on it consistently, you do see a reduction over time, but it’s more gradual than dramatic. Effectiveness feels a bit hit or miss depending on the ant type and location. It helps reduce visible activity, but it doesn’t always feel like it fully wipes out the colony. In my experience, you may need to reposition stakes, use additional treatments, or be patient longer than expected to see meaningful results. It’s helpful as part of an overall ant control strategy, but it may not be strong enough on its own for heavier infestations. Build and formulation quality are fine. The stakes hold up well outdoors, don’t leak, and are easy to remove or relocate. They also last a reasonable amount of time before needing replacement, which is good for ongoing control rather than a one-time fix. Overall, these TERRO outdoor ant baits are useful and do provide some level of control, but they aren’t a miracle solution. They work best for light to moderate ant problems and when ants actively take the bait. With stronger attraction or faster colony impact, they could easily be a five-star product. As they are now, four stars feels fair.