How to poison cockroaches with boric acid - 10 folk remedies

Products containing boric acid to kill cockroaches are popular folk methods of pest control. If boric acid is used correctly, the drug is effective and non-toxic to people.

There are many recipes with boric acid. Boric acid is mixed with bread, sugar, flour, eggs and other products. So, how to poison cockroaches using boric acid.

Boric acid with flour and powdered sugar

Ingredients: 4 bags of boric acid, flour, powdered sugar, raw yolk.

Method of preparation: Mix all ingredients until smooth. If the mixture turns out to be thick, dilute it with water, so the volume of the bait will increase. Make cakes or balls and place them in problem areas where you see cockroaches.

The recipe is similar to sugar balls, but here it is not sugar that is used, but powdered sugar; flour is rarely added to add viscosity.

Poisonous water

Cockroaches cannot live without water, so they regularly appear near sources of life-giving moisture. This is the bathroom and kitchen. Poisoned drinking bowls should be placed near the bathtub, toilet or sink. Dissolve a teaspoon of sugar in half a glass of water. Add 30 g of boric acid. Pour the poison into saucers or nylon lids. Place drinking bowls near plumbing fixtures.

If insects are accustomed to drinking from a sink, then they will go to it, bypassing the drinking bowl with poison. To force a cockroach to drink poisoned water, you need to eliminate other sources of moisture. Wash the plumbing fixtures, wipe them dry and limit their use.

Boric acid against cockroaches with water

A poison recipe with boric acid is effective not only in powder form, but also in the form of a liquid solution. Use liquid solution or beads based on conditions.

What does boric acid based liquid bait mean? This is when boric acid powder is dissolved in water with the addition of vanillin or regular sugar. You can use beer, sweet syrup and other liquid that will attract pests. Drinkers are especially effective at night if you place them where cockroaches usually go to drink (in the sink, in the toilet, under pipes, in a cupboard with dishes, etc.). How to poison cockroaches with boric acid in liquid form? For 100 milliliters of water you will need 50 grams of boric acid powder. Mix water with sugar, honey or use another aromatic liquid. It is important to limit cockroaches' access to clean water. It is necessary to turn off the taps, remove the kettle and any containers with water, wipe the sink and close the drain.

Now that you know how to poison cockroaches in an apartment with boric acid, you can choose one of the recipes and use it at your own discretion.

Poison in its purest form

If you don’t have enough time to prepare the balls, you can simplify the task and use the product in its pure form. Insects are unlikely to eat the tasteless powder, but the particles will stick to their legs. When the cockroach begins to clean them with its jaws, it will swallow the poison. You need to scatter boric acid where insects go, namely:

  • near the sink, toilet, bathtub;
  • along the baseboards;
  • under cabinets, bedside tables, tables (especially in the kitchen);
  • next to the refrigerator, stove;
  • near pipelines;
  • around the trash can.

To ensure that as many insects as possible come into contact with the poison, you need to scatter the powder in thin paths. If you sprinkle the substance in a heap, most cockroaches will remain unharmed.

How does the drug work on cockroaches?

When using boric acid against cockroaches, you should not expect an immediate effect. Upon contact with the product, pests carry it to their nests on their paws and eat it with food. Despite the fact that cockroaches are known for their omnivorous nature, boric acid is a powerful poison for them.

Once in the body, the drug begins to slowly affect the nervous system of insects, blocks impulses, leads to paralysis, and then death from suffocation.

Only those insects that came into contact with the powder die. To poison 1 insect, 1-2 grams are enough. boric acid. It can take a lot of money to eradicate a large population. Most of the boric acid goes unnoticed by cockroaches, so it is recommended to make baits that include this drug.

Danger to household members

Boric acid is not toxic to people and animals. If your pet accidentally swallows the bait, you don’t have to worry about his health. If a child finds and tastes the ball, there will be no serious consequences for his health. But it is better to avoid such cases.

The safety of boric acid can be confirmed by the fact that the substance was previously used to disinfect open wounds. But due to the increasing incidence of allergic reactions, doctors abandoned this technique. Despite all the positive characteristics, it is better for some groups of people to limit contact with the substance, namely:

  • children under three years old;
  • pregnant and lactating women;
  • patients with renal failure;
  • patients with inflammation of the skin.

Nausea, vomiting, headache and rash are the main side effects of boric acid. If your family has similar symptoms, you should immediately perform a gastric lavage, remove all traps and ventilate the room well.

Prevention of re-infestation by cockroaches

Prepared bait does not guarantee continued existence without insects. To prevent the reappearance of cockroaches in the apartment, it is necessary to take certain preventive measures.

Here they are:

  • prevent the possible penetration of cockroaches through ventilation, windows, drain holes (install grilles with small cells, close drains, treat windows with sealants, etc.).
  • Clean the apartment regularly, throw out trash, do not leave dirty dishes in the sink or on the table, wipe up crumbs.
  • Avoid leaking taps and other plumbing fixtures, as excessive moisture only attracts insects.
  • Regularly treat premises with insecticides (it is best to poison cockroaches with the onset of summer).

Living in a private house greatly simplifies the process of getting rid of unpleasant insects. If cockroaches appear in the apartment, the fight against them must be systematic.

Poison recipes

The easiest way is to scatter the substance along pipes, cabinets, baseboards and on high shelves.

However, the effectiveness of this method is questionable, since cockroaches may not eat boric acid powder. To achieve the desired result, it is worth preparing a special bait based on the specified chemical insecticide.

Please note: the powder or solution itself must be used as the leading component. Other forms of boric acid are not suitable. For example, an alcohol tincture will only repel insects with a sharp, specific smell. Methods of using the product may vary.

How to make boric acid balls with egg

Typically, boric acid is used in conjunction with an egg (both raw and boiled). From the resulting mass, cockroach balls are rolled and placed in suitable places.

There are many recipes for preparing poison, but almost every one, except for the main component, contains an egg. Sometimes these two components are combined with an additional product that makes the bait even more attractive to insects.

Recipe with boiled yolk

The easiest recipe to prepare. It is necessary to mix boric acid with a hard-boiled egg. Only the yolk is used for bait, since its bright color attracts cockroaches very well.

If the mass does not stick well, you can dilute it slightly with water (sour cream, kefir or butter). Roll the pulp into balls and place them in places where insects crawl.

Recipe with boiled and raw yolk

Cockroach balls can be prepared by mixing boric acid with raw and boiled eggs.

The boiled egg yolk acts as a visual lure in this recipe. Its smell will force the insect to try the prepared poison.

The white of a raw egg can be used as a paste, which will perfectly hold the balls together and prevent them from falling apart after drying.

Recipe with vegetable oil and egg yolk

To prepare this bait you will need:

  • boiled yolk.
  • Boric acid powder (40 g or 4 sachets weighing 10 g each).
  • 1 tsp. sunflower oil.

First, you should thoroughly mash the yolk with a fork. Then add the remaining ingredients, stir the entire mixture thoroughly until smooth. Roll small balls (5-7 mm in diameter) from the resulting boron mass against cockroaches.

With potatoes

If the area to be treated is large, you can prepare bait with poison, eggs and potatoes.

For this you will need:

  • potatoes, boiled with peel (1 pc.).
  • Hard-boiled egg yolk (1 pc.).
  • Kefir.
  • Boric powder (40-50 g).

It is necessary to mix all the components, if necessary, slightly diluting with kefir to the desired consistency. Roll the resulting mass into balls and place them in suitable places.

With minced meat

This is another way to poison cockroaches using boric acid.

Meat products are very loved by many insects. Even the lowest quality product is excellent for preparing poisonous bait.

Form balls from a mixture of minced meat, boron powder and raw egg. Place in pre-selected places where children or pets cannot reach the poison. The presence of an egg in the bait will not allow it to dry out or lose its designated shape.

With bread

Usually bread only attracts insects, but in combination with boric acid it plays the role of an excellent poison in the fight against cockroaches.

It is necessary to mix boric acid powder and bread crumb, then add a raw egg to the mixture. If the mixture is too thick, it can be diluted with water until a homogeneous paste is obtained. Form walnut-sized balls from the resulting mixture and place them in areas where cockroaches gather.

With flour

If you don’t want to roll cockroach balls out of boric acid, you can use a dry version of the bait.

For these purposes, you will need to mix the main component with flour, which will significantly weaken the specific smell of poison. Pour the resulting mixture onto pieces of paper and place in suitable places.

The effectiveness of the technique is enhanced if it is used together with other chemicals, for example, special gels.

Liquid bait with sugar

To prepare such bait, you must do the following:

  • mix the yolk of a raw egg and 40-50 gr. boron powder.
  • Add 2-3 tbsp. l. sugar and stir until smooth.

If necessary, you can pour in a little water to thin it out, or vice versa, mix in flour if the consistency is too runny.

Liquid boric acid will help eliminate cockroaches. You must first dilute the solution with water, and then treat the floor surface, high shelves, etc. with it.

Important: if there are small children in the house, it is necessary to regularly wash their hands and all toys to prevent intoxication.

Poisoning of cockroaches can only be carried out if there is no food or food waste left in the room. Dishes, table and floors must be washed, garbage taken out, drinks poured out. Then the insects will begin to eat the bait, which will lead to their further death.

With sunflower oil

Sunflower oil bait will attract more insects than any other bait. To make the aroma of the poison more noticeable, it is better to use unrefined oil that smells like seeds.

To prepare poison for cockroaches, you need to mix a solution of boric acid (or substance powder) with any food mass. Not only an egg will do, but also crushed potatoes, porridge chopped in a blender, leftover soup or fatty cottage cheese. Vegetable oil will allow all the components to “glue” together, so the balls will not lose moisture and will keep their shape perfectly.

Please note: you can replace sunflower oil with sesame oil.

Processing rules

It is necessary to process the room taking into account some nuances.

Instructions for using homemade poison are as follows:

  • prevent insects from accessing food and food waste (wash dishes and stoves in a timely manner, take out trash, pack food in sealed containers).
  • Eliminate humidity as much as possible, since the poisonous effect of the bait on the insect’s body is reduced by drinking water.
  • Prevent possible contact with the bait by pets and small children.
  • Re-treat the area after a couple of weeks to kill any cockroaches that have hatched from previously laid eggs.

When placing poison bait around the apartment, you should definitely do a thorough cleaning. While fighting cockroaches, it is necessary to systematically maintain absolute cleanliness.

Reasons why the product does not work

There are often cases when boric acid does not help remove cockroaches. There may be five main reasons.

  1. Addiction. Insects are poisoned with this drug so often that they develop resistance.
  2. Incomplete coverage. There is always a chance that some cockroaches will avoid the poison. They can find alternative sources of food and water that no one is aware of.
  3. Unsanitary conditions. Boric acid will only help if the room is kept clean. Otherwise, the cockroach will not touch the poison, because it already has enough food sources.
  4. Unclean neighbors. If the insects came from neighbors, no matter how much they are poisoned, the number will not decrease. It is necessary to block cockroaches' access to your home. Cover the ventilation holes with mesh and fill the cracks in the walls.
  5. Eggs. Boric acid has no effect on cockroach eggs. The product only works against adults.

If there are too many cockroaches, boric acid will be useless. Some insects will be poisoned, while the rest will calmly walk around the house and reproduce. In this case, aggressive chemistry cannot be avoided.

Do not relax if you have not seen any “guests” for several days after treatment. To ensure that insects no longer bother you, pay enough attention to prevention. Keep your home perfectly clean. Once or twice a month, place boron baits in the most “dangerous” places.

Preparatory stage before processing the premises

Treating a room against cockroaches must necessarily be preceded by a preparatory stage.

  • First of all, all rooms should be cleaned to deprive insects of food. It is necessary that the bait be the only source of food.
  • After each meal, be sure to remove the remaining food so that there is no food left on the table. You can store food in containers or in the refrigerator. You should not leave crumbs on the table, otherwise they will attract parasites.
  • The trash bin must be kept clean. Take it out and wash it every night.
  • For cockroaches, water is more important than food, so it is important not to give them the opportunity to drink. Keep plumbing and water pipes in good condition. Wipe the sink, washbasin or bathtub until it is completely dry each time you use it.

Why do you need yolk as part of the bait?

A person does not smell the smell that comes from boric acid. It is for this reason that textbooks indicate that it has neither smell nor taste.

But cockroaches have a more subtle sense of smell than humans. They are able to capture aroma that humans cannot smell.

Egg yolk can remove the smell of boric acid, which increases the likelihood of cockroaches eating the bait. But the yolk itself is a desirable food for the Prussians.

Rules of application


Boric acid is a safe means of controlling cockroaches. It is non-toxic and can be used in premises for any purpose. When working with powder or creating baits, it is necessary to protect the skin and respiratory tract. Use masks and gloves.

It is necessary to scatter the powder in places where insects accumulate and live. Cockroaches love dark places, so baits can be placed under cabinets, in the corners of the apartment, behind furniture. Try to protect animals from accidentally ingesting the product.

Does not create dust and does not leave stains. Requires careful handling. After installing the baits and applying the powder, you must wait at least 2-3 weeks before washing off the composition. Renew boric acid periodically.

If the drug comes into contact with moisture, the effect is reduced. Not recommended for use in open areas outside. The drug should be washed off with a soda-soap solution.

Advantages and disadvantages

The use of this substance in the fight against cockroaches has many advantages:

  • affordable cost of all components of the bait.
  • High performance.
  • Exposure leading to sterilization and death of insects.
  • Lack of habituation in cockroaches.
  • Ease of preparation and further disposal of bait.
  • No unpleasant odor or harmful fumes.

In addition to the positive qualities, this technique also has negative sides.

Here they are:

  • the effect is cumulative, i.e. The death of cockroaches occurs after a while.
  • The effects of the poison do not extend to eggs already laid by the female.

Despite its disadvantages, boric acid is considered one of the most effective methods for killing cockroaches. In addition, insects inevitably develop an addiction to purchased chemicals over time.

Where to place bait?

For the poison to work, you need to block the cockroach from any access to water, so before baiting, remove any moisture in the kitchen:

  • hide vessels with water, wet sponges and rags;
  • turn off all taps;
  • Wipe the sink dry.

If you are using pure boron powder, sprinkle it in all areas where cockroaches are likely to appear. Any prepared bait can be spread out:

  • near the baseboards;
  • next to the trash can;
  • under the stove, refrigerator;
  • on shelves in closets.

Pay close attention to wet areas:

  • space under the sink;
  • a place near a sewer drain;
  • area near the toilet;
  • taps and connections to them.

If you have small children or pets and you are afraid that they will eat the bait, spread the poison only at night and remove it in the morning. Adults will begin to die within a day and will be completely hatched within a month. You should not remove the bait immediately after extermination. Cockroach eggs may remain, from which new individuals will hatch. Leave the poison for about another 6 months, periodically replacing old balls with fresh ones.

Advantages of the substance and user reviews

An absolute advantage, judging by the reviews, is the cost of the acid, which is several times lower than other substances. Also the advantages of the substance:

    The drug helps not only to destroy uninvited guests, but also promotes their sterilization, which eliminates the possibility of their subsequent reproduction. It has no odor, which makes the substance a fairly comfortable method of pest control for households. Preparing bait does not require special skills, takes little time and does not require additional protective equipment. It poses virtually no danger to humans.

Method safety

Boric acid against cockroaches has established itself as one of the safest and most effective methods of exterminating pests. The product can be used on objects for any purpose, including places where children and animals live.

Does not cause burns upon contact with skin, or poisoning due to accidental inhalation during work. However, in any case, it is necessary to follow safety rules, protect mucous membranes, skin, and respiratory tract.


People with sensitive skin, pregnant and lactating women, and people with kidney disease are not allowed to use the product. Contact with the drug by children is not allowed.

When preparing baits, keep pets away from their locations. If accidentally swallowed, your pet will not suffer serious injuries or health problems.

The powder may cause an allergic reaction. If symptoms occur, you should consult a doctor.

The method is one of the safest. This is especially true for chemical insecticides. However, when making a choice in its favor, it is important to understand that the effect can be several times lower than with professional help.

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