Looking for the best roach killer? Well, read on – I’ve covered it all.
Roaches, including American, Oriental, and German species, are a real household nuisance and will often hide in their nests.
So, let’s get started!
Reviews: 9 Best Roach Killer 2019 (Sprays & Baits)
Top on the best roach killer is Harris Boric Acid that contains 99% boric acid and 1% lure. It has a straw attached on the top, which makes it easy to use. For the regular-sized kitchens, this powder can last for about a year.
Therefore, you can simply pour the acid in the places that would be in general challenging to reach such as cracks and crevices. The manufacturer notes that this formula will kill the roaches within 72 hours after the first contact – which is fast action time.
Despite having a higher price tag than other roach killers, this powder roach killer has a lure that will help you get rid of the roaches faster. Check the full review for Harris Boric Acid Roach Powder.
The roaches carry the killer powder on their bodies to the nest and hence help eliminate the whole roach population.
Combat Max 12-Month is a discrete roach killer that’ll be active all year round. This roach killer solution will be great if your home has a regular infestation by small cockroaches. With this trap, you won’t have to keep many insecticides in the house.
Highlights: Ease of using, budget-friendly, and highly effective for a long time, and discreet usage. But what is this trap really?
It’s made up of black discs that a homeowner can place in concealed locations such as under the bed, behind your toilet, under the fridge, in drawers or cabinets. Every package comes with 18 bait stations that can last you even about a year controlling roaches in your house. Now, onto my Combat Max 12-Month roach killer.
As noted in the bait station name, these roach killers will be active to kill cockroaches for about 12 months. Therefore, exterminators consider this roach bait to be one of the longest lasting roach killing solutions available in the market today.
The key advantages of this bait station are that it’s both durable and cheap, and thus consumers consider them as great value for their money. Luckily, I noted that after getting the bait stations to various locations in the house, I experienced a sudden reduction in the roach population. The roaches will eat the Fipronil and transport them back to their nests, which will not kill just themselves but other roaches in the colony.
Luckily, since the roaches carry the insecticide to their nests, this bait station will help kill even the cockroaches that you can’t see and can’t reach with spraying.
One of a few of the roaches will feed on the bait station and spread the love to their counterparts who were left at ‘home’ in areas like under huge appliances or sinks. Therefore, to kill a large roach population in your apartment, this Combat Max 12-Month is our top recommendation.
To expel cockroaches and avoid re-infestation, I recommend this Raid Ant & Roach Killer – the best roach killer for apartments. This easy to use model kills roaches on contact and is effective for ants too. You’ll love the lemon scent that will attract the roaches but also leave the room fresh.
Its residue is effective for about 4 weeks – which will kill all those hiding bugs (beetles, spiders, water bugs etc) during summer and beyond. In addition, this spray will prevent roach infestation or re-infestation. This spray is effective for areas that you know have roaches – particularly places they pass through. Check the comprehensive review for Raid and Roach killer.
You’ll need to spray the Raid Ant & Roach Killer on visible crevices and crack where the roaches could be hiding. Luckily, once you spray effectively around the critical areas around your apartment, you’ll get longer protection against the disturbing roaches.
This Raid Ant & Roach Killer has a great lemon scent that you’ll love. However, some homeowners hate that you have to sometimes chase the roaches to spray them since the insecticide kills on contact. It has excellent reviews with some clients loving the lemon smell and fast action.
Invict Gold Gel Bait, with 2.15% Imidacloprid as its active ingredient, is specially designed for German roaches. Imidacloprid will cause a secondary kill effect on the stubborn roaches in your apartment.
Equally, just like with the Advion gel, you’ll just require to plunge the roach bait (about a quarter inch in diameter) on crevices on the skirting boards, floors, and wall.
Imidacloprid will disrupt the roaches’ nervous system and equally block its neuronal pathways, which leaves to fatal effects on bugs. The Roach Bait by Bayer CropScience leaves no bad smell behind.
I recommend Invict Roach gel bait too for application in indoor and outdoor spaces. However, you’ll have to reapply the gel every 3 months and only apply it on areas that are away from kids and pets.
Fun Fact: Roaches can’t really withstand a nuclear blast!
5. Black Flag Roach Motel 61009 Roach Trap – Large Trap
Roach Motel 61009 roach trap will be great for moderate roach infestations – killing both cockroaches and various crawling insects – among the best cockroach killer. Luckily, this trap (unlike the Raid Ant & Roach spray above) can kill even the roaches that you’ve not even seen. Roaches will check in and won’t ever get the chance to check out.
Using a strong adhesive (syrupy bait), the Roach Motel 61009 trap will get hold of the roaches on contact – but has some slight odor. Therefore, it’ll be a great alternative to using pesticides or poisons in the roach killers. It’ll be functional for roughly 2-4 months.
The adhesive has some attractant for the cockroaches. However, avoid keeping the trap in areas with dirt and dust as it might cover the syrupy bait, which will significantly reduce its effectiveness. Some roach exterminators at The Spruce noted that this roach trap is highly effective for all roach types and sizes.
But, you might still require to employ contact roach killers such as those with Raid Ant & Roach Spray. I noted that this Roach Motel 61009 roach bait will work for kitchen areas (like cabinets or cupboards) and food areas because it has no poisons. However, keep pets and children away from this bait as they might be unable to remove themselves from the sticky setup.
This Black Flag Roach Motel 61009 will clean a roach infestation and won’t leave carcasses spread all over the house like the roach sprays. As noted above, the roach trap employs a sticky and sweetly smelling formula that will attract the roaches to the created cardboard box. Check Video.
In addition to killing roaches in the apartment, Ortho Home Defense will also help you eliminate those bugs off your perimeter walls. Luckily, this roach killer is also longer-lasting and fast-acting, which means that it kills on contact.
Therefore, if you need a roach solution that you can use for defense attacks, the Ortho Home Defense will great for going around your house or apartment. But, for a massive roach infestation, you can start with applying the formula inside and under refrigerators, sinks, cabinets or baseboards.
Create a lethal roach barrier with this formula in areas such as garage, crawlspace, door-frames, and windows. However, this roach formula is poisonous and thus you must avoid spraying in areas frequented by pets or kids.
But use this roach formula in floor areas that won’t be covered by carpets. It has the non-staining capability, it’s rain-resistant and has no odor in addition to being quick to kill roaches and other insects such as spiders. Luckily, the barrier you’ve created will be active for a couple of months (about 12 months) eliminating even other insects such as spiders.
DuPont Advion gel contains (1) a bait to attract roaches and (2) indoxacarb that causes a secondary kill effect on roaches like American and German cockroach. It contains carboxylate, which is supper lethal to roaches but safe for pets.
So, simply plunge the gel from syringes onto basements, cabinets, baseboards and kitchen counter-tops. However, take care if you’re using the roach gel on planes and boats including areas such as trashcans or baseboards.
Advion’s active ingredients will change to new molecules when inside the roaches’ body and thus won’t harm other useful insects like ladybugs. But Advion gel is great for outdoor and indoor application including holes or cracks.
The roach bait has a long residue effect. Also, the syringe allows you to drop the roach bait into small crevices and cracks. Luckily, the secondary kill effect allows the roach bait to kill both the visible roaches and those in hiding.
Related: What do Roaches Smell like?
Using Best Roach Killers – Step By Step
What’s the best way to will roaches? Traps, Baits, Sprays, and Growth Regulators (IGR). (1) Contact roach killers, and Roach Repellents, (2) Roach killers with secondary kill effect and Gel baits (contain both an attractant and roach poison), and (3) diatomaceous earth powder (breaks the roaches’ exoskeleton, and fatally removes its body fluid).
Side note: To control German roaches effectively, cut the bug’s access to water by cleaning clogged drains or repairing leaking plumbing work. Further, for roach prevention, you can use secure food storage and thoroughly clean your spaces on a daily basis.
1. Step 1: Use Glue Strips and Flashlight
(i) Flashlight – First, it’ll be helpful to do a roach examination at your house. For this, pick some flashlight to check the hidden places for roaches. Such areas include bathroom closets and cabinets, closet door corners, cracks in shelves and cabinets, under the kitchen sink, and behind your refrigerator.
(ii) Roach glue strips – Next, you can apply roach glue strips to determine if you have a massive roach infestation in your home. Considering the observation you made using the flashlight, you’ll need to put the roach glue strips on the highly strategic places. So, maintain the strips in those areas while monitoring for 4-7 days.
Therfeore, the strips that’ll catch more roaches will signify the highly infested areas in your house and thus must get more aggressive roach treatment.
2. Step 2: Seal any Crevices and Cracks with Caulk
The roach killers such as traps will help exterminate the bugs. However, these products won’t significantly prevent roaches that are outdoors from getting into your house.
Installing caulk on any openings that roaches might use will help limit roach reinfestation through areas like entry holes, tiny cracks and crevices, and gaps in your tiles and walls.
Further, you can install weather stripping on your operable trunks, windows, and doors.
3. Step 3: Set Up Roach Baits and Roach Traps.
a. Roach Baits
Roach bait is an indoor roach killer or poison that exploits the emetophobic, coprophagic and cannibalistic trends of cockroaches. Gel bait stations will come in tubes that you can squeeze into crevices and cracks and under baseboards.
The roaches that’ll be poisoned go back to their roach nest, vomit, or even die. Therefore, the roaches in the nest will cannibalize (eat the dead roach) or eat their vomit and hence this will pass the active bait poison to them.
There are different types of roach bait for various roach species that you can use both for indoor and outdoor spaces. But roach baits may make many roaches to die in several areas of your house – and thus you’ll need to vacuum thoroughly in 3-7 days.
Also, Granular baits are mainly used in outdoor spaces such as mulched areas in which roaches hide and breed in the house. But they can also be used in wall voids and attic. To control the roach colony, the baits should contain Hydramethylnon 2% and Fipronil 0.05%.
Avoid using baits in combination with other insecticides. The insecticide can spoil the bait and thus would neutralize the domino impact/ secondary kill effect. Also, the roach would die before scattering the bait poison to the nests.
b. Roach Traps
Roach tarps of bait stations provide a no-mess method to control the roaches in your apartment. The baits attract the roaches with an enticing chemical smell, and thus they eat the bait and die.
Further, roach traps employ both a trap and a containment technique to control the roaches. Also, the roach trap will injure and contain the roach if it tries to escape if the poison bait does not kill it.
Bait stations are designed to kill the roach slowly. After consuming the bait, the roach carries the poison back to their nest and disperse it to other insects.
Equally, use the same principle while baiting insects. It is important for the foraging worker ants the bait carry the poisonous bait back to the ant nest.
4. Step 3: Sprinkle Boric Acid and Use Roach Sprays.
a. Boric Acid Powder
Boric Acid is created from boron plus water, which makes it extremely toxic to roaches but is safe for pets and humans. Normally boric acid occurs in toothpaste and washing detergent – but it’s in powder form for roach control.
Avoid placing the boric acid powder near places with air currents and this would blow it away from roaches or onto places with pets and kids. Boric acid is naturally found in the ground and they act through contact and ingestion. Borax will stick to the bug’s body or they’ll eat it and damage its nervous system causing fatality.
Some of us sometimes just need a product that’ll work with no complications such as becoming toxic to kids and pets. If you’re anything like me, you’d thus go for some of the powdered roach killers such as Boric acid/ borax powder.
However, the interesting bit is that the roaches will carry the boric acid back to their nest and poison the other insects and hence may help wipe the whole roach population.
b. Roach Sprays
Most of the users love roach spray apart from some that have pungent smells. The sprays have D-phenothrin and prallethrin as the active ingredients. The roach sprays can be used on cracks, crevices, and furniture to reach the roach nests effectively.
The pyrethrum ingredient enters the roaches’ cuticle to bind the nerves’ sodium channels and thus stopping body activities such as heartbeat and breathing in the apartment. Despite being a very harmful nerve agent to roaches, the pyrethrum is nontoxic to human beings and other mammals.
c. Roach Killer Bombs
Roach bombs or foggers are effective in treating a large cockroach infestation. However, you’ll need to learn when to use the best roach bomb for the house as it can be less efficient in roaches that are hidden in voids. Place the roach bomb at the middle of the room and set it off to allow the insecticide to move up and settle down killing roaches on contact.
5. Insect growth regulators (IGRs)
IGRs are categorized as insecticides that do not kill the roach instantly but adversely affect its ability to grow and mature naturally. IGRs block the cockroaches’ ability to reproduce or grow into an adult. The IGRs will ensure that the roaches in your house do not develop another generation in their population as it will decrease their capacity to grow or reproduce.
Some IGRs mimic the natural growth hormones and are thus named juvenoid IGRs. They affect the length in which the roach remains in the larval or nymphal stage and the time when it turns into an adult. When you expose the cockroach nymphs to the juvenoid IGRs, they develop infertile adults or will not molt into adults.
Also, the chemicals can affect the roaches’ adult life by blocking the creation of viable roach eggs. As a birth control method, the IGR will help prevent the development of roach babies or tiny roaches.
How To Choose your Cockroach Killers
Tip: You should choose the Best Roach Killer depending on where the roaches in your house are hiding. However, you might require more than just one kind of roach killer for a large apartment or for a smaller house.
While you might enjoy catching some roaches roaming around the house, it is no secret that there is a whole colony that is hiding at some location in your residence. However, spray insecticides will kill the roaches only on contact. Therefore, you should target the roaches in the areas they breed and live, which makes Bait Strips, Gels, and Combat baits to be highly effective in roach elimination.
Cockroaches enjoy living in water and dark conditions that have water and food. Also, bathrooms and kitchens are excellent nesting areas for roaches. After creating a nest and accessing enough food and water, the roach population will increase rapidly. Therefore, you will only see the roaches when they are looking for food, water or when they are migrating to a new nest when their population has grown too large, or they are escaping from insecticides.
Roaches taste the food and other substances using their feet. German roaches love light Karo Syrup, brown sugar, proteins carbohydrates, and sucrose. However, when you mix sodium borate or boric acid, food-grade Diatomaceous Earth baits; ensure to keep them out of reach of children and pets.
The active ingredients in your Roach Killers?
1. Fipronil and Hydramethylnon.
Some pesticides are highly toxic (and result in health complications) if eaten by pets or kids. This is because the kid’s kidneys, liver, nervous system, and brain are still underdeveloped and won’t easily handle the harsh chemicals.
For example, the Fipronil ingredient in roach killing pesticides is highly toxic – they damage the insect’s central nervous system. If human beings and pets eat it, they’ll experience seizures, dizziness, headaches, and sweating.
Practically, hydramethylnon works like a great stomach poison for roaches that hinders the energy generation in the bugs. This ingredient is common in Combat cockroach Baits. The main technique to have roach killers with this ingredient to work effectively to improve the sanitation of your apartment.
Thus, you’d need to clean any water pools and food debris that would be lying around your house. Therefore, in addition, to increase chances of the bugs feeding on the hydramethylnon laced bait, your house will also attract less new roaches.
2. Indoxacarb and Zeta-Cypermethrin/ Bifenthrin
Indoxacarb is described as “low-toxicity” (doesn’t bring mutagenic or carcinogenic issues) and will control cockroaches and ants. This ingredient kills roaches through contact or when the bugs eat food or plants that are laced with the Indoxacarb.
A 2008 research reported that one insecticide treatment with indoxacarb kills 3 roach generations. Its mode of action is through preventing regular movement go sodium ions through the roaches’ nerve cells.
This causes paralysis and poor nerve function and finally death. Advion Roach Bait Gel is an example of a roach killer that contains the Indoxacarb ingredient.
b. Zeta-Cypermethrin and Bifenthrin
The Zeta-Cypermethrin and Bifenthrin ingredients that’ll eliminate crawling bugs including cockroaches. For example, Bifenthrin damages the roaches’ nervous system which results in paralysis and eventually fatality. Being people and pets safe, this ingredients is appropriate for home use in addition to its features of being odor free and non-staining.
3. Bifenthrin and Cypermethrin and Imiprothrin
On the products, the Bifenthrin is contained in Ortho Home Defense Max that we’ve reviewed an earlier in this post.
b. Cypermethrin and Imiprothrin
Cypermethrin and Imiprothrin ingredients are readily used in Raid insecticides that target roaches. I noted that these ingredients allow the spray to leave a great smell in your apartment – and thus won’t have a bad odor.
4. Imidacloprid and MetaActiveTM
Imidacloprid is an active ingredient in roach killers such as Invict Gold Gel (about 2.15%) and it has features that make it almost similar to nicotine. Imidacloprid works through ingestion and contact.
Nicotine, found in tobacco, that hinders stimuli transmission for the bugs’ nervous system. This ingredient is mainly used to target German cockroaches.
Imidacloprid will block the nicotinergic (the neuronal pathway) that mainly causes acetylcholine accumulation, paralysis and eventually the roach dies.
MetaActiveTM is a strong insecticide ingredient that’s great for a wide range of roaches such as Asian, Australian, and German roaches. Its mainly used in the home, commercial and industry roach control particularly where the bugs have grown resistant to the available bug baits.
Therefore, it is critical to target the right places using the correct products while trying to control roaches in the house. Combat is created from carbohydrate-rich attractants which highly attract roaches.
The roaches that roam in your house searching food and water will eat Combat and spread it to the rest of the population in the nests. The roaches spread the poising through feces, sputum, and carcass.
Place the roach baits in areas that roaches frequent, mix peanut butter and boric acid to make a trap cake for roaches, pour diatomaceous earth in areas where roaches will be moving, remove all water sources or clogs in the apartment.
Combat Gel will help you control roaches in areas that are difficult to reach in the house. The gel’s characteristic feature will fit into crevices and cracks which the roaches use as entry and nests.
Further, you may use the gel to fight roaches on pipes that act as an entry into your house. Bait strip will be effective to place under shelves and the garbage lids since they have an adhesive area to allow easy concealment from pets and kids.