HARRIS Boric Acid Roach and Silverfish Killer Powder w/Lure for Insects (16oz)

This product does work. I git rid if the entire population 99.9 in three weeks of regular use. The rest 1% am sure I will get rid of in the coming weeks.Just simply spreading the power on floor or in corners may not work.But I had to do a bit more from my side,rather than just simply dispersing or spreading the powder, I spread the powder in small "trays" (the lid of the food containers we get from restaurant) .Then I prepared a "bait" . I took some left over food,cockroach's favorite food (a little fried rice, potato french fries, oily fried fish and sugar) and mixed it with the powder.Then I placed a little bait in the mid of the each trays . Placing it mid made sure in order to eat they had to pass through the powder around it.I placed the trays in potential locations (kitchen, bathrooms ,dining rooms) during the night. I made sure I did clean the area and floor before I placed the tray.This will make sure the only available food is the one in the tray in those locations.The bait(good oily food) and powder will easily attract the german cockroachs as the lights go downEvery night they came and ate the bait as well as powder. They passed through the powder and carried home the powder and food along with it.Next few mornings I just harvested 100s dead cockroach from tray and around the floor. Every night I gave them fresh "bait" (basically oily food with sugar mixed with PF Harris powder) and placed it in mid of tray. They should be able to get into tray and get out easily. Make sure the tray is NOT having TALl smooth surface . Better is paper tray (make one if you can ) . A pizza box is a good one for this purpose.Some may have went back to the nest and died. They took the powder and food carried along with them to nest.I read and researched thatThe female cockroach (are usually back in nest with egg) and with babies . They ate the powder on the body of these carrier cockroachs coming back and females and babies die.Once they all start dieing and stop getting the food they start eating the dead ones ( poisoned and having the powder on their bodies) and the rest remaining aldo die.It will be a chain reaction and the entire population is eliminated.The point here is you need to let the cockroach go back to the nest after it visited your tray. They will die eventually and will carry the bait and powder back home yk kill the others. Never kill (intentionally) the contaminated carrier cockroachs,let them go back to nest.It takes more than 72 hours to see a noticeable impact so don't get discouraged or disappointed. It takes time and very slow but effective and eliminates it from the roots.It worked for me .I have reduced it to 99.9 % for sure in last three I zm going to continue this for next one month until I achieve 100% success.

Put this along the floor sills of the external building walls before adding insulation. It was used as a preventive measure the take care on invading insects that might come in from the outside of the structure. Easy to apply, but will not know the effectiveness until several months pass.

*Note* I don't know how common this is, but the cap on the item I ordered was loose, so the Amazon box was full of white powder that was covering my other purchases when it arrived. So maybe don't order this item along with other products that you don't want to get covered with boric acid while in transit.Also, it took me a while to figure this out, but you have to cut off the tip of the applicator with scissors. The entire lid can screw off, and there's a replaceable cap, but there's no real way for the powder to get out unless/until you manually cut off the applicator tip.Anyway, I love this stuff. My previous method for dealing with roaches had been to chase after them with a heavy-duty flyswatter. The down sides to this are that, A) I, as a germophobe, hate having to clean bug guts off the flyswatter afterward, B) my aim isn't the best, so half the time I'd miss and the dang roach would escape, and C) for every individual roach you kill, there are who knows how many still hiding out of sight in the walls or whatever.Using boric acid is better because, not only can you use it proactively and passively (you can sprinkle it around your home and let it do its work regardless of whether you're paying attention or not), but I feel that it's a lot easier to clean up. I don't have to stress about cleaning an instrument and then cleaning everything the instrument and the water touched; all I have to do is just my regular vacuuming routine, then re-apply boric acid if necessary.Also, you don't have to have good aim if you see a roach, you just squirt the bottle in the right direction and you'll probably get a decent amount of power on the insect.From what I understand, the way the boric acid works is that if/when a roach walks through it, it sticks to their feet; then when they clean their feet, they ingest the poison, which eventually kills them.I also had to re-train myself to just toss powder on them and then let them run off - not only does that save me the time and stress of hunting, but with luck, it'll also kill more roaches behind the scenes when they interact with the contaminated one.In a recent incident, I encountered a roach and threw boric acid on it; it freaked out and ran around the living room, but couldn't find a way out (I practically have no furniture and I plug up all the holes I find). I noticed that its gait was starting to get irregular after a minute, so maybe the powder was affecting it without it even having to eat it. The roach eventually stumbled into a spider's web and couldn't get out; by the time I finally had time to dispose of it, it was very dead - not sure if that was because of the powder or the spider, but either way, good riddance.Note that a wide, thin layer that bugs can't help walking through is a lot better than a thick clump they can easily avoid. I'm also under the impression that boric acid loses its effectiveness if it gets wet; if nothing else, powder that gets wet will clump together and will no longer stick to the bugs' feet if they walk through it.Also, boric acid is probably not a good option for households with members, such as young children or pets, who might be tempted to eat the powder. But if you don't have to worry about vulnerable housemates, boric acid is great and I recommend it to help with roach problems. (I haven't seen it affect any other kinds of bugs, though.)

I originally bought this product about 3 weeks ago. I rent a house and when I moved in about a week after it became very apparent that there was a huge roach infestation. Like, we couldn't even cook, eat, leave something on the counter for a few minutes. We couldn't do anything without it getting infested with bugs almost immediately. I can't even tell you just how much food we've had to throw away because of the roaches, they get into the bags of bread and everything else. I tried everything under the sun to get rid of these bugs, sprays, traps and anything else you can think of that you can buy in the store. I was pretty much at my wit's end because about a month-and-a-half ago we felt like we were literally being run out of our house by these bugs and the landlord was not doing anything. So I went perusing around Amazon and found this. At first I was relatively skeptical and I happen to have five kids so there are certain places in the house where you would see an abundance of bugs, particularly the kitchen the bathroom and it was actually getting to the point where they were just running out in broad daylight around the house on the floor on the walls, just everywhere. So I decided to send my children to their dad's house so that I could basically set the house up to not be touched for at least 72 hours. I started by scrubbing everything down, cleaning making sure there was no dishes, no water, no access to food which meant that I had to buy Ziploc bags and plastic containers that were airtight. I started putting everything into those containers. I also eliminated most of the cardboard which are places they like to hide.. Then I started making sure that there was nothing else that was going to save them. Then I proceeded to go to all the places that I saw a lot of roaches and sprinkled this powder in those areas, that included behind the sink into the drain after I had made sure that the sink was fully dry all down the sides of the sink. Then I started doing the countertops, anywhere that I saw that they would crawl, because you ultimately want them to come in contact with this in any way possible. If you put a big mound of it they're not going to walk over it they'll just walk around it. So you want to be kind of conspicuous when you're sprinkling this and not overdo it. The ultimate goal is to get as many bugs to come in contact with this as possible without them realizing that they've come into contact with it. So then I decided that I was going to gently sprinkle the entire kitchen floor with it because I knew that I was going to be leaving for a few days. This will only work if you don't disrupt it because the bottle specifically states that it takes about 72 hours before you're going to start seeing dead bugs. So after sprinkling this all over my kitchen floor and in other places that I felt were hot spots for bugs I proceeded to leave the house for 72 hours. I didn't go far I was able to come back each day and check in to see how everything was going and the plan actually worked flawlessly, because of the fact that they had no choice but to crawl across the kitchen floor. So it's been approximately two-and-a-half to three weeks since I did this and I would say that the issue has been decreased by about 50 to 60%. Now I've read that a very large investigation can take up to 2 months or 8 weeks but I do see a very large decrease in the amount of bugs that are in this house. I actually woke up this morning and there were dead bugs scattered everywhere. I actually thought that maybe my kids had sprayed bug spray but when I asked them they hadn't so I know that the product is working as it's supposed to. I'll update my review in about three or four more weeks when it's been almost 2 months.* edit 2 month update *We probably have nipped the infestation by 75 percent. Be persistent thats what this needs. I even started dusting this in nooks and crannies around the sink where the counters were kind of separated. Worked like a charm. We still see activity but it's random and I can now put a bowl on the counter or prep food and if i need to run to the bathroom i can safely. Also the powder cannot get wet if it does its basically useless. Goodluck all...

Works better than the other brands syringe gel. But roaches walk all over this and still live taking days to die.

Given my profession, I value products that truly deliver on their promises regarding effectiveness and performance. In use, Harris cockroach-killing powder proved flawless: the applicator nozzle makes it easy to place the product precisely into cracks and hard-to-reach areas, achieving rapid and long-lasting pest control. It retains its active properties perfectly and exceeded my expectations. Furthermore, the service was excellent, with fast delivery and the product arriving in perfect condition. 100% recommended.

NOT PET FRIENDLY!!! MUST KEEP AWAY FROM PETS!!! Great price. Easy to use. Works well.

This product works incredibly well! I noticed a significant reduction in roaches within a few days. It’s easy to apply and definitely worth the money.

Used bottle having half filled quantity, without a tip, not useful