Does ajax powder kill roaches

Close up any openings to a home and maintain a vegetation-free zone to keep roaches out. Avoid foggers and instead kill roaches with diatomaceous earth, …

Does ajax powder kill roaches. It can be ground into a powder. When chemically processed with hydrochloric acid, it becomes boric acid or hydrogen borate. Both borax and boric acid can be used to kill roaches, but borax is more easily accessible. A Note about Cockroaches. If you have roaches in your home, they are most likely either American or German Cockroaches.

Quick View. Southern Ag Boric Acid Roach Powder. $29.09. Free Shipping! Boric acid roach powder which effectively kills roaches, ants, and silverfish under and behind the refrigerator, sink, dishwasher, and washing machine, into openings around drains, water pipes, and in crack and crevices. Compare.

How long does Raid take to kill roaches? Raid, a widely recognized brand in pest control, typically starts affecting roaches within a few minutes of direct contact, and can kill them …You can use ajax powder to keep roaches away but can’t effectively kill them; although it can kill them, there are more chances of survival when exposed to ajax powder. If you want to kill roaches by using ajax powder, make a solution and try to drown it, the simple spray is not practical, and roaches are good at sensing danger, so they may ...When applied to a roach’s exoskeleton, DE causes it to dry out and die. You can also apply DE to infested areas, such as your pantry or pantry. DE works best when applied directly over roaches. However, DE can also kill bed bugs, spiders, silverfish, ants, and flea larvae. DE is safe for pets when used properly.Quick View. Southern Ag Boric Acid Roach Powder. $29.09. Free Shipping! Boric acid roach powder which effectively kills roaches, ants, and silverfish under and behind the refrigerator, sink, dishwasher, and washing machine, into openings around drains, water pipes, and in crack and crevices. Compare.Yes, you can mix borax with water to kill roaches by making a strong concentrated solution of borax and just a little water to dissolve it. However, this dilutes the borax and makes it less toxic to the roaches. Here is how to make a borax water spray at home for cockroaches: Add 5 teaspoons of borax in a bottle spray.It’s sweet and irresistible to them, plus it mixes well with borax powder, a popular roach killer. Take an equal portion of cocoa powder and borax. Mix them in a plastic container with an airtight lid. Sprinkling the mixture where you often see roaches. The cocoa powder should attract the roaches even if you’re slightly off the placement.It has been proven effective in controlling various pests, including cockroaches. Why Use Borax for Roaches? There are several reasons to choose …It has been proven effective in controlling various pests, including cockroaches. Why Use Borax for Roaches? There are several reasons to choose …

Jul 6, 2020 · 1. Cockroach Spray – Raid, Hot Shot, Bengal. Pesticide sprays, such as Raid, Hot Shot, and Bengal are among the most popular household items used to kill cockroaches. That’s not surprising as these sprays are easy to buy, use, and store. Plus, the results are instant. One spray and the insects die immediately. Step 2: Prepare the peppermint oil mixture. In a spray bottle, create a peppermint oil mixture. Add 10 to 15 drops of high-quality peppermint essential oil for a water-based spray, then fill the rest of the bottle with water. If you prefer a vinegar-based spray, use a ratio of 1 part peppermint oil to 2 parts white vinegar.Jul 6, 2020 · 1. Cockroach Spray – Raid, Hot Shot, Bengal. Pesticide sprays, such as Raid, Hot Shot, and Bengal are among the most popular household items used to kill cockroaches. That’s not surprising as these sprays are easy to buy, use, and store. Plus, the results are instant. One spray and the insects die immediately. Here’s how you can use grounded coffee to kill cockroaches: Put coffee grounds in small paper cups. Place these cups in water-filled jars. Place the jar against walls or baseboards around places where you have noticed the roaches at night. The cockroaches will be lured into the trap and will not be able to escape.The brain, in turn, produces a specific response; therefore, roaches tend to eat such foods. 6. How Does Boric Acid Kill Roaches? Boric acid is the same as borax; you can use one out of these two to kill roaches. It is a poisonous chemical that affects the brain of a roach. This results in abnormal movement of the roach.Jul 7, 2023 · Permethrin is a synthetic insecticide that’s commonly used to control a variety of pests, including roaches. It works by disrupting the nervous system of insects, causing paralysis and death. When it comes to killing roaches, permethrin can be quite effective. However, there are some important factors to consider before using this chemical. Combine baking soda and onion to formulate an insecticide effective in eliminating roaches. Follow these steps: 1. Cut an onion into slices or chunks. 2. Sprinkle baking soda over the onion pieces. 3. Arrange the treated onion in a bowl or around areas frequented by roaches. 4.Yes, bleach can be an effective way to kill cockroach eggs. However, cockroaches are resilient creatures and finding their nest is complex. Because bleach is not an excellent way to kill roaches, your best bet is to use insecticides on a cockroach nest. Furthermore, nearly all cockroach pesticides are also effective at killing …

The acid dissolves in their stomach and slowly kills them. Hydramethylnon is a more intensive chemical used by exterminators for cockroach control. It eradicates several different kinds of insects, including roaches, ants, and termites. It is most often found in bait stations or roach motels.Bay leaves. 4. Bay Leaves (Laurel) You can place chopped bay leaves in places where you suspect they roaches are living. They cannot stand the smell of these leaves. Garlic (left) and pepper (right). 5. Garlic (Powder) and Pepper. Sprinkling garlic and/or pepper around your home can help keep cockroaches away.Get the lowdown on when to call an exterminator for roaches with this informative article. We share tips and advice on roach infestations. Expert Advice On Improving Your Home Vide...

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June 16, 2022 by adminpest. Boracic powder is a white powder that is made from borax and zinc oxide. This powder will kill the cockroaches by dehydrating them. The boric acid in the powder will make their skin dry out so much that their bodies cannot absorb water anymore, and they will die from dehydration. Cockroaches are a menace to your home.Use borax powder to kill roaches by mixing Borax and sugar for the cockroaches. The sugars act as bait, and once the cockroach feeds on it, the Borax attacks the digestive system and the exoskeleton. It dehydrates the roach, which eventually dies. Related reading: Laboratory evaluation.Theoretically, you can use any soap that disrupts water’s surface tension to do this. Dishwashing liquid (Dawn) has been shown to be very effective. A 2002 study proved the efficiency of common dishwashing liquid when applied directly to German cockroaches (one of the most common species). Adults and nymphs were completely dead within 72 ...Many VCs have said they are sitting out this year. They aren't -- they're funding their friends and committing funds to companies that don't exist. If you had to sum up the 2022 ve... But can it be used as a roach killer? Many people believe that baking powder can be an effective and non-toxic way to get rid of roaches. However, there is some debate about its effectiveness and safety for pets and humans. The Debate Around Baking Powder as a Roach Killer. Some people claim that baking powder can be an effective way to kill ... Once the roaches are in the jar, pour boiling water into the trap to kill them instantly. Diatomaceous Earth. One of the many diatomaceous earth uses is that it works against a wide variety of insects, such as stink bugs. It works against cockroaches too. DE is sharp and cuts through the cockroach’s exoskeleton.

Step 2: Prepare the peppermint oil mixture. In a spray bottle, create a peppermint oil mixture. Add 10 to 15 drops of high-quality peppermint essential oil for a water-based spray, then fill the rest of the bottle with water. If you prefer a vinegar-based spray, use a ratio of 1 part peppermint oil to 2 parts white vinegar.The Ajax ® Powder Cleanser is especially designed as an easy rinse, scratch-free formula that can help you clean a wide variety of appliances in your home. From chrome to porcelain, from ceramic tile to pots, pans, and bathroom fixtures, as well as other durable, surfaces Ajax ® Powder Cleanser will help you leave your home shiny and clean.Step 1. Combine one part laundry detergent with one part sugar in a bait station or lid. Add a pinch of borax if desired to make the bait even more effective; borax is commonly used to control roach infestations. The sugar is used to attract the roaches to the bait. Video of the Day.However, it’s not as effective as many think. Bleach exterminates roaches through ingestion or drowning. The insects will die if they drink the caustic chemicals or eat something soaked in it. Unfortunately, that rarely ever happens! The strong scent of bleach is not something that roaches are keen on eating.Yes, you can mix borax with water to kill roaches by making a strong concentrated solution of borax and just a little water to dissolve it. However, this dilutes the borax and makes it less toxic to the roaches. Here is how to make a borax water spray at home for cockroaches: Add 5 teaspoons of borax in a bottle spray.It has been proven effective in controlling various pests, including cockroaches. Why Use Borax for Roaches? There are several reasons to choose …Running cockroaches through a washing machine can kill them if the wash temperature is higher than 125°F and the cycle is longer than 40 minutes. Drying the clothes at a high …Diatomaceous earth is a powdery substance made from the fossilized remains of tiny, aquatic organisms called diatoms. These diatoms have hard, silica-based shells that break down into sharp, microscopic particles when crushed. These particles are incredibly effective at killing roaches and other insects by damaging their exoskeletons and …Boric acid has excellent killing power against roaches and has been used for centuries. The good thing about boric acid is that it stays on the surface for a long and effectively keeps on killing roaches. However, boric acid must be consumed by roaches in order to kill them. Therefore it must be mixed with a substitute like flour or sugar.Kills cockroaches, palmetto bugs, water-bugs, silverfish and ants. 99.0% boric acid makes it effective for control of cockroaches in kitchens, basements, wash-rooms - where ever roaches might exist. Odorless and non-staining. Applicator tip allows for controlled placement. This product is applicable for the following pest types: Roaches.It can be ground into a powder. When chemically processed with hydrochloric acid, it becomes boric acid or hydrogen borate. Both borax and boric acid can be used to kill roaches, but borax is more easily accessible. A Note about Cockroaches. If you have roaches in your home, they are most likely either American or German Cockroaches.The most effective concentration of soap to water was 3% which killed the adult cockroaches within 72 hours. 5. How to use: To kill German cockroaches, you need some liquid soap, water, and a spray bottle. Fill a spray bottle with water, leaving enough room to add liquid washing up detergent.

One thing to be aware of is that baking soda will need to be fresh, powdered, and straight. To get cockroaches to eat baking soda to kill them, you need to mix it with things that they can’t resist, such as sugar or other foods. ... Even mixed with baking soda, it does kill cockroaches. The main issue here is that you can’t mix both with water.

However, since roaches are skilled at adapting to even professional-level insecticides, it sounds a little suspect. Baking soda does kill roaches. However, the cockroaches must eat the baking soda so that it can expand in their guts. This will cause severe pressure once they drink water. Since their exoskeleton will be unable to expand, …Yes, you can mix borax with water to kill roaches by making a strong concentrated solution of borax and just a little water to dissolve it. However, this dilutes the borax and makes it less toxic to the roaches. Here is how to make a borax water spray at home for cockroaches: Add 5 teaspoons of borax in a bottle spray.Theoretically, you can use any soap that disrupts water’s surface tension to do this. Dishwashing liquid (Dawn) has been shown to be very effective. A 2002 study proved the efficiency of common dishwashing liquid when applied directly to German cockroaches (one of the most common species). Adults and nymphs were completely dead within 72 ...No, Ajax does not effectively kill roaches. While drowning roaches in a solution of Ajax powder is a method that can be used, spraying Ajax on roaches …Yes, food grade diatomaceous earth kills roaches, it does so by coating their exoskeleton and then begins to eat away and destroy their exoskeleton, killing the cockroach in the process.That being said, diatomaceous earth does not kill cockroaches on contact, and it can take multiple days from when a roach walks through the diatomaceous earth until it …Diatomaceous earth is a naturally occurring powder that contains 80 to 90 percent silica. This powder is made from fossilized algae shells and other marine organisms. In addition, it is an environmentally friendly and readily available pest control option. This powder is off-white, similar like talc, and has no odor. Types of Diatomaceous Earth2. Baking Soda and Borax. A lot of people use baking sodaand Borax together to fight the roaches more efficiently, and the truth is it’s working but the ingredients could work separately also. Baking soda might potentially kill more roaches, but the lures with Borax in it are far more effective. 3.First Published: December 8, 2023 | Updated: February 27, 2024. Certain insecticides and home remedies can kill cockroaches instantly, with common options including boric …

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Blending baking soda and sugar or cocoa powder makes a convenient roach killer. The insects eat the baking soda and react with the water inside them to dispatch them. When roaches strike, your home starts to feel like a battleground. Use simple and safe pest control by relying on baking soda to destroy your cockroach population.Chloroxylenol, a strong-smelling, relatively non-toxic disinfectant used in the cleaner Dettol appears to repel roaches at an impressive rate. Methyl neodecanamide, an ingredient …When dusting in crevices, near baseboards, and mixed with roach bait, this effective roach killer will result in a lot of dead roaches. Borax has been long used by homeowners as a potent insecticide against cockroaches. This can be done by using borax as a bait (along with a food attractant) or on its own. As a bait, borax is mixed with …Oct 13, 2023 · 4. When using blue death powder for cockroaches, it’s crucial to apply it strategically. Instead of scattering it randomly, focus on areas where cockroaches are most likely to pass through, such as crevices, corners, and beneath appliances. 5. Blue death powder can lose its effectiveness if it gets wet or damp. Here’s how you can use grounded coffee to kill cockroaches: Put coffee grounds in small paper cups. Place these cups in water-filled jars. Place the jar against walls or baseboards around places where you have noticed the roaches at night. The cockroaches will be lured into the trap and will not be able to escape.Besides other effective approaches for killing roaches and deterring their entry into your home, powders could also be an easy and effective remedy. The five …Does Catnip Repel Roaches . In simple words- Yes! Catnip is an excellent natural roach repellent. It belongs to the mint family and contains the chemical nepetalactone, which is a substance that roaches are very sensitive to. Therefore, using catnip is an excellent way to keep roaches away. Does Catnip Kill RoachesThe other roaches will eat the dead roach and die from the poison as well. Bait stations kill off some of the roaches in your home but will not kill them all. You also may not like the sight of them scattered around your house. There are also roach hotels that only contain glue to trap the roaches, with no poison. 4. Use boric acid powderDoes Bleach Kill Roaches? January 12, 2024 October 30, 2023 by admin. ... – Dry bleach powder concentrates around 40% sodium hypochloriteTop 5 Roach Killers. Best Application Tools: Advion Pest Control Gel. Best Roach Trap: Hot Shot Ultra-Liquid Roach Bait. Best For Small Infestations: Raid Roach Gel. Best Roach Fogger: Raid Concentrated Deep-Reach Fogger. Best Multipurpose Killer: Ortho Home Defense MAX Insect Killer Spray.Jul 6, 2020 · 1. Cockroach Spray – Raid, Hot Shot, Bengal. Pesticide sprays, such as Raid, Hot Shot, and Bengal are among the most popular household items used to kill cockroaches. That’s not surprising as these sprays are easy to buy, use, and store. Plus, the results are instant. One spray and the insects die immediately. Yes, Diatomaceous earth can be used as an effective treatment for roaches and is exceptionally potent. More and more people have realized the benefits of DE and opting to use the powder over more dangerous chemical options. Not only does DE work against cockroaches, but it also helps remove fleas, bed bugs, and ticks. ….

Quick View. Southern Ag Boric Acid Roach Powder. $29.09. Free Shipping! Boric acid roach powder which effectively kills roaches, ants, and silverfish under and behind the refrigerator, sink, dishwasher, and washing machine, into openings around drains, water pipes, and in crack and crevices. Compare. Lemons are a natural insecticide and can be used to kill cockroaches. Simply cut a lemon in half, and sprinkle the juice in areas where roaches are known to live. The lemon juice will kill the cockroaches. To best use lemons to kill baby roaches, combine it with another natural pesticide like diatomaceous earth.The roaches need to walk through the borax for it to work. Borax will get stuck to the legs of the roaches, and as they clean it off, they’ll die. This is a good thing because roaches will eat other dead …When cockroaches walk over diatomaceous earth, the powder sticks to their hairy legs and bodies. Here, it begins to work underneath the cockroach’s plates. Once it reaches the main inner body as fine, sand-like grains, it dehydrates the cockroach. Over a few days or weeks, it will cause death by desiccation.However, it’s not as effective as many think. Bleach exterminates roaches through ingestion or drowning. The insects will die if they drink the caustic chemicals or eat something soaked in it. Unfortunately, that rarely ever happens! The strong scent of bleach is not something that roaches are keen on eating.Ortho Orthene is a powerful insecticide that can potentially kill a whole host of unwanted insect pests, including roaches. Ortho has marketed this product for use against fire ants, but it retains its ability to kill other creepy crawlies as well. It comes in a 12-ounce container of granules and works best when used as part of the Ortho 2-Step ...Yes, Raid Ant and Roach can indeed kill wasps. While it’s not specifically designed for wasps, it contains ingredients such as Imiprothrin and Cypermethrin, both of which are insecticides effective against a broad range of pests. These ingredients can impact a wasp’s nervous system, leading to paralysis and eventual death.Does Ajax Powder Kill Roaches . Ajax powder is a popular insecticide that is known for its ability to kill roaches. However, there are some concerns about whether or not it is effective against these pests. One of the main active ingredients in Ajax powder is boric acid. Does ajax powder kill roaches, Blending baking soda and sugar or cocoa powder makes a convenient roach killer. The insects eat the baking soda and react with the water inside them to dispatch them. When roaches strike, your home starts to feel like a battleground. Use simple and safe pest control by relying on baking soda to destroy your cockroach population., Yes, food grade diatomaceous earth kills roaches, it does so by coating their exoskeleton and then begins to eat away and destroy their exoskeleton, killing the cockroach in the process.That being said, diatomaceous earth does not kill cockroaches on contact, and it can take multiple days from when a roach walks through the diatomaceous earth until it …, Yes, Bleach can indeed kill roaches, although it isn’t considered a highly effective insecticide for this purpose. Nonetheless, it can be an option if used with proper safety precautions, especially when you’re looking for a short-term solution while exploring more efficient methods. Bleach contains a composition of highly hazardous ..., The Hot Shot MaxAttrax Roach Killing Powder is like many other powders in that its active ingredient is boric acid. This is a highly effective toxin for ant control, and it likely works fine for ..., Laundry detergent can be an effective tool in killing cockroaches due to its chemical composition and ability to suffocate the pests. The active ingredients in laundry detergent, such as surfactants and enzymes, can disrupt the cockroach’s respiratory system and cause them to die. When using laundry detergent as a cockroach killer, it is ..., The roaches need to walk through the borax for it to work. Borax will get stuck to the legs of the roaches, and as they clean it off, they’ll die. This is a good thing because roaches will eat other dead …, Compared to DE, CimeXa is a relatively speedy bed bug dust. In one experiment, it killed over 80% of bed bugs after just one week. Six weeks in, 98% of the bed bugs were dead. When applied as a nearly-invisible coating, even bed bugs highly resistant to liquid pesticides died within seconds. 1., Does baby powder stop sweating? Visit Discovery Health to learn if baby powder stops sweating. Advertisement If you have problems with excessive sweating, you'll probably try a var..., Blending baking soda and sugar or cocoa powder makes a convenient roach killer. The insects eat the baking soda and react with the water inside them to dispatch them. When roaches strike, your home starts to feel like a battleground. Use simple and safe pest control by relying on baking soda to destroy your cockroach population., But they’re very effective, and Terro’s gel is easier to dispense than the others. $16 from Amazon. $16 from Lowe's. If you try baits for a couple of weeks with little success, experts ..., The aroma may be too strong for you, though. Therefore, you could use garlic powder. With this remedy, it’s not the scent that keeps cockroaches away. Instead, it’s the chemical composition of the garlic. You could also use peppermint oil to both ward off and kill cockroaches. The scent of the mint oil will make the cockroaches avoid the area., This includes: Windex is a popular household cleaner that is considered very safe for humans, and very dangerous for pests. If you see a pest inside of your home, spraying them with Windex often means instant death. Windex can be very effective for spiders, and for killing large numbers of ants. Keep in mind, however, that ants breed quickly ... , The most effective concentration of soap to water was 3% which killed the adult cockroaches within 72 hours. 5. How to use: To kill German cockroaches, you need some liquid soap, water, and a spray bottle. Fill a spray bottle with water, leaving enough room to add liquid washing up detergent., BEST SPRAY: Raid Essentials Ant & Roach Killer Spray Bottle. BEST TRAP: Hoy Hoy Trap-A-Roach Bait Glue Traps. BEST GEL: Syngenta 383920 Advion Cockroach Gel Bait. BEST POWDER: Harris Boric Acid ..., Yes, you can use Epsom salt to kill roaches. However, it will not be very effective against a cockroach infestation. Plus, you will need something to entice the bugs to eat the substance, so utilizing sugar, peanut butter, or similar bait will help you utilize the substance efficiently. Both of these methods have a similar result to a bait made ..., Theoretically, you can use any soap that disrupts water’s surface tension to do this. Dishwashing liquid (Dawn) has been shown to be very effective. A 2002 study proved the efficiency of common dishwashing liquid when applied directly to German cockroaches (one of the most common species). Adults and nymphs were completely …, Here are ingredients and steps to create a washing powder recipe that kills cockroaches at home. Step 1 – Make your bait station. Get a shallow dish, plastic lid or even shallow container. You can use a few of them depending on the severity of the roach problem. Combine one part laundry detergent and one part sugar and place it in the lids., Author: Ms. Kyla VonRueden III | Last update: Wednesday, June 29, 2022. The aroma of garlic has long been known to have repellent effects to many insects, including cockroaches. Garlic has a pungent smell that cockroaches don't like. Method: Crush a clove of clove garlic and place around infested areas as deterrents., Yes, Raid Ant and Roach can indeed kill wasps. While it’s not specifically designed for wasps, it contains ingredients such as Imiprothrin and Cypermethrin, both of which are insecticides effective against a broad range of pests. These ingredients can impact a wasp’s nervous system, leading to paralysis and eventual death., Combine baking soda and onion to formulate an insecticide effective in eliminating roaches. Follow these steps: 1. Cut an onion into slices or chunks. 2. Sprinkle baking soda over the onion pieces. 3. Arrange the treated onion in a bowl or around areas frequented by roaches. 4., Does Bleach Kill Roaches? January 12, 2024 October 30, 2023 by admin. ... – Dry bleach powder concentrates around 40% sodium hypochlorite, When applied to a roach’s exoskeleton, DE causes it to dry out and die. You can also apply DE to infested areas, such as your pantry or pantry. DE works best when applied directly over roaches. However, DE can also kill bed bugs, spiders, silverfish, ants, and flea larvae. DE is safe for pets when used properly., 1. Borax with Sugar. One of the easiest ways to get a cockroach to ingest Borax quickly and, as a result, die is to mix it with sugar. You can use either white or brown sugar – it doesn’t matter. The roaches will be attracted to the sweet taste of the sugar and will consume the powder., Yes, you can mix borax with water to kill roaches by making a strong concentrated solution of borax and just a little water to dissolve it. However, this dilutes the borax and makes it less toxic to the roaches. Here is how to make a borax water spray at home for cockroaches: Add 5 teaspoons of borax in a bottle spray., Exterminators say this is the next best thing to professional roach killing sprays. Why does this bait work so well? The borax is the key ingredient here. The sugar is just a way to get the roaches to take the bait. When roaches walk through the borax, the powder will dehydrate their exoskeletons, killing them shortly after. To make this bait, mix:, Once consumed, the baking soda mixed with acid and any water in the roaches’ stomachs will react and build up pressure that eventually kills the insects. It may be effective in killing roaches, but baking soda isn’t naturally attractive to the insects. If you’re going to use baking soda to solve your roach problem, you’ll need to mix ..., 1. Cockroach Eliminating Method: Baking Soda and Sugar. Rating: 0/5. The method: Mix equal parts baking soda and sugar in a shallow bowl and place near the site of your last cockroach sighting. The idea is that the sugar attracts the cockroaches and the baking soda will kill them., The best mix-in is either powdered or table sugar. Mix one part of the sugar with three parts of boric acid. ... Unfortunately, the only real way to instantly kill a roach is by crushing it under your shoe. But, you don’t need to kill cockroaches instantaneously to get rid of infestations. Boric acid takes about 72 hours to kill a roach, but ..., This includes: Windex is a popular household cleaner that is considered very safe for humans, and very dangerous for pests. If you see a pest inside of your home, spraying them with Windex often means instant death. Windex can be very effective for spiders, and for killing large numbers of ants. Keep in mind, however, that ants breed quickly ... , The answer is both yes and no. Baby powder can repel roaches, but it’s not an effective way to kill them. This is because the baby powder is simply a dusting agent with no toxic properties that would kill the roaches. The only way to get rid of roaches is to use a pesticide. , , Face powder poisoning occurs when someone swallows or breathes in this substance. Face powder poisoning occurs when someone swallows or breathes in this substance. This article is ..., Combine baking soda and onion to formulate an insecticide effective in eliminating roaches. Follow these steps: 1. Cut an onion into slices or chunks. 2. Sprinkle baking soda over the onion pieces. 3. Arrange the treated onion in a bowl or around areas frequented by roaches. 4.