Borax: Borax is a classic roach killer. It's a powdery substance which is a kind of salt. It dehydrates the cockroaches' exoskeletons and kills them. Boric Acid: Another powder solution is boric acid, dehydrating the exoskeleton until they die.
Boric acid: Used correctly, boric acid is one of the most effective roach killers. It's odorless, has low toxicity to pets, and since it isn't repellent to roaches, they will not seek to avoid it, crawling through it repeatedly until it kills them.
Boric acid
Boric acid can be used as an antiseptic and a preservative. But it's also fatal to cockroaches. Roaches need to consume boric acid for them to work. The best way to encourage them to eat it is by mixing it in a solution that is equal part sugar and water.
Boric Acid works by interfering with the roach's digestive system. In addition, the powder will cling to the outside of the roach, helping to kill other roaches when the affected roach returns to the colony. The powder is fast acting; insects coming into contact with the boric acid will die within 72 hours.
Set out a shallow dish or bowl containing equal parts sugar and baking soda. Roaches are attracted to the sugar, but the mixture is deadly to them.
Method: Take equal parts of baking soda and a pinch of sugar in a shallow bowl, then place it near to the cockroach-infested areas or in where roaches are usually roaming at your house. The sugar attracts the cockroaches while baking soda will kill them.
Because baking soda expands in the gut of cockroaches and causes drastic pressure when they drink water since their exoskeleton doesn't allow them to expand and this can kill cockroaches.
Studies have found a boric acid and sugar combination to be a very effective killer of roaches, but more readily available is Borax mixed with sugar, which also gets the job done. Simply mix three parts Borax to one part sugar for bait, and be sure to keep your pets out of the vicinity.
Borax is a readily-available laundry product that's excellent for killing roaches. For best results, combine equal parts borax and white table sugar. Dust the mixture any place you've seen roach activity. When the roaches consume the borax, it will dehydrate them and kill them rapidly.
The best mix-in is either powdered or table sugar. Mix one part of the sugar with three parts of boric acid. Then, you can sprinkle the mixture directly in places you've seen roaches, or you can place it on something like a paper plate. Either way, you'll want to make sure it's in a place the cockroach can get to.
Boric acid tops even baking soda when it comes to killing cockroaches. With little more than a sprinkle on the floor, boric acid acts as an all-natural poison to take down dirty roaches in just days.
How long does it take boric acid to kill roaches? Boric acid kills cockroaches within three days of coming into contact with it.
Diatomaceous earth is a natural way to deal with cockroach. It is available in fine powder form that sticks to roaches body and kill them by dehydration process. Diatomaceous eath is also very effective in killing the roach eggs. It is best method to use in fine areas, as DE fine powder can reach inside the cracks.
Smells that roaches hate: a quickfire summary
Oregano, rosemary, mint, eucalyptus, lemongrass and catnip are great herby options. Citrus oils work brilliantly too. And surprisingly, lower concentrations – 2.5 parts per hundred – seem to work best as deterrents.
Cayenne, Garlic, and Onion Powder
Walk around your home and sprinkle all cockroach-prone areas with this spice mixture. Cockroaches can't stand the smell of these spices and will avoid all areas sprinkled with them.
Baking soda can kill cockroaches around 12 to 24 hours after initial consumption. There are several factors that will play a role. These include how hydrated the cockroach is, its proximity to water, how much baking soda it has consumed, and when it drinks water.
Once you have taken away food and hiding places for roaches, you can place bay leaves, cucumbers, garlic, hedgeapples, or catnip in high and damp spaces around your home to repel them. Gentrol is an insect-growth regulator that eliminates the reproductive potential of cockroaches without killing them.
#2: Baking Soda Is a Convenient Home Remedy for Cockroaches
A concoction of baking soda and sugar is an effective cockroach killer and controls the multiplication of these pests. Sugar acts as a bait to attract cockroaches and the baking soda kills them.
Bleach can kill roaches on contact. However, pouring it down a drain can potentially release toxic fumes, and cause long-term damage to your system. While the use of bleach may help with a cockroach problem, because of its toxic nature it should never be poured down a drain or toilet.
You'll likely notice more roaches than usual immediately after beginning treatment, but that's because they're trying to escape the chemicals killing them.