Bug weevil (lat. Curcullionidae), or elephant, belongs to one of the largest families, numbering more than 70,000 species, and most of them inhabit the tropics. IN middle lane There are about 5,000 species of weevils. The weevil insect is a plant pest, and each species has its own preferences - one variety damages forest plants, another is a garden beetle, a third is a garden beetle, a fourth variety of beetle damages the growing point of a palm tree, as a result of which the plant dies.

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Weevil pest - description

Weevils range in length from 1 to 30 mm, while tropical species grow up to 5 cm in length. The body shape of beetles of this genus can be flat and oblong, cylindrical, rod-shaped, rhombic, spherical, convex hemispherical or pear-shaped. The color varies from yellow to black, there may be spots on the body, and it may have a metallic tint. The insect's legs may differ in color from the body. The upper part of the weevil's body may be hairy or bare, and may be covered with an earthen crust or glazed brown scales. Characteristic feature The insect is characterized by an elongated front part of the head - the rostrum, from which the genus of insects got its name.

Weevils are divided into two subspecies - short-proboscis and long-proboscis, differing from each other in the length of the rostrum. The larvae of long-proboscis species usually develop in plant tissues, consuming them as food, while the larvae of short-proboscis species live in the soil, feeding on plant roots.

Weevils living in the middle zone prefer to live on berry crops, and they are attracted not by fruits, but by flower buds in which the female lays eggs. The larvae that emerge from the eggs eat the flower from the inside, and if there are a lot of weevils, you may not get any berries at all. However, there are also types of weevils such as house weevils and barn weevils.

Barn weevil

The barn weevil is a small dark brown bug about 4 mm long with underdeveloped wings. This is a dangerous pest of grain crops. Moreover, archaeologists have established that it has been engaged in its destructive activities for a long time: in the 20th century, scientists discovered traces of the weevil in excavations of ancient Egyptian burials, and in Ancient Rome the insect was known as a pest called Curculio. Adult insect damages grain and products made from it, and larvae from eggs, which a female can lay up to 300 eggs in one clutch, develop in grains of millet, wheat, rice (rice weevil), oats, barley, buckwheat, and rye. The weevil also lives in flour and pasta. Grain infected with weevil larvae becomes unusable, causing digestive disorders in people, as it becomes hygroscopic, heats up on its own and rots.

House weevil

The weevil in the apartment is the same barn weevil in grain, which enters the apartment along with purchased cereals. The female lays each egg in a cave gnawed out in the grain and seals the hole with her secretions. There, after 6-12 days, a larva emerges from the egg, which feeds on the inside of the grain, and then gnaws through its shell and comes out. How to get rid of weevils in grain? It is difficult to combat the pest precisely because the larva cannot be detected while it is in the grain, and yet there are ways to combat the weevil.

How to get rid of weevils

Fighting weevil

Everyone has to fight this dangerous and polyphagous pest. available means– preventive, physical-mechanical, chemical, biological and folk.

As a preventive measure, before receiving and placing grain, you should disinfect storage facilities from the granary weevil - wet or aerosol, and then treat the grain - dry it, clean it of debris, cool it as much as possible and, if necessary, treat it with contact insecticides.

On summer cottages where other types of pests are common, for preventive purposes they use loosening the tree trunks, removing fallen leaves, dry and diseased branches, planting pest-repellent crops in the rows, preventive treatment plants with the biological preparation Fitoverm, attract birds to the site by hanging birdhouses and nest boxes on the trees, and when weevils appear before mating and laying eggs, they are collected manually or shaken off onto a dense cloth spread under the trees or bushes, after which the pests are destroyed. If the invasion of weevils is widespread, you will have to resort to folk remedies or to treating plants with potent chemicals.

Weevil remedies (preparations)

It is dangerous to use chemical weevil control agents at home. But in the garden or garden, their use is quite justified. The best drugs for weevils:

• Kinmiks– plants are treated with a solution of 2.5 ml of the drug in 10 liters of water;
• Decis– dissolve 2 ml of the drug in 10 liters of water for spraying plants;
• Fufanon, Iskra-M, Kemifos, Karbafos-500– 10 ml of any of these drugs should be diluted in 10 liters of water;
• During the growing season, plants are treated with a solution of 20 ml Fitoverma in 10 liters of water.

IN summer time bugs on tree crowns are treated with a solution of Bazudin or Fozalon, prepared in accordance with the instructions, and against the larvae of leaf pests, the soil can be treated with Bazudin or Diazinon.

Fighting weevils with folk remedies

Since the use of chemicals can be harmful to human health, it is best to destroy the weevil using non-toxic folk remedies. For example, during the period of bud formation, you can treat plants with the following preparations:

• dissolve 10-13 g of powdered mustard in 10 liters of water;
• dissolve 40 g of grated powder in a bucket of water laundry soap;
• dilute 2.5-3 kg of wood ash in 10 liters of water;
• stir 5 g of potassium permanganate in a bucket of water;
• grate 80-100 g of laundry soap, dissolve them in warm water, add 20 g of borax, 200 g of kerosene and stir the mixture vigorously until an emulsion is formed, which must be immediately applied to the plants.

How to deal with weevils in an apartment

How to get rid of barn weevil after finding it in an apartment? There are simple and effective ways pest control based on the characteristics of its life and reproduction:

• check all stored cereals, tea, cocoa, coffee, pasta and flour in which weevils can settle and, if you find traces of their presence, get rid of these products, since the secretions of weevils and their larvae are carcinogenic;
• since weevils and their larvae die already at -5 ºC, it is possible to place for 2-3 days not yet infected products, in which pests can settle, in freezer. For preventive purposes, you can do this with all the cereals, flour and pasta that you buy;
• Weevils also die when heated to 40 ºC for two days, and if the heating is increased to 60 ºC, then in six hours, so it makes sense to heat the cereal in the oven;
• It is better to store already disinfected products in glass or plastic, hermetically sealed containers that will be difficult for the beetle to chew through. Place whole, peeled cloves of garlic in jars with cereals and pasta; you can put 2-3 in flour nutmeg, and sprinkle a little hot pepper into the peas and beans;
• shelves and surfaces on which there are containers with cereals, flour or pasta are treated from time to time, first with a soap solution, and then with water and table vinegar, and after treatment, cloves, bay leaves or lavender flowers are laid out on them;
• To make it easier to monitor the condition of the products, do not stock too much unnecessarily.

How to get rid of weevils on your property

Weevil on strawberry

The strawberry weevil is a gray-black long-proboscis bug up to 3 mm in size. In the spring, individuals mate in flower buds, in which the larvae then develop. How to deal with weevils on strawberries? Today, there are many ways to destroy the pest, which can save up to 40% of the crop even with total damage. The sooner you start your fight against the beetle, the more chances you have to emerge victorious.

In the spring, when the air temperature is uncomfortable for the pest, treat the area with strawberries with the following means:

• iodine solution - dilute a teaspoon of iodine in a bucket of water;
• dissolve 3 Intra-vir weevil tablets in 10 liters of water.

Carry out the first treatment 5-6 days before the start of flowering, the next time spraying is carried out in mid-summer. Biological preparations Antonem-F and Namabact can be used to process strawberries or garden strawberries. Until the end of spring, it is permissible to use the drugs Fitoverm, Iskra-bio and Akarin. It is advisable not to resort to stronger means, for example, insecticides such as Karbofos, Actellik and Metaphos.

Cherry weevil

The cherry weevil, also known as cherry trumpet weevil, also known as cherry elephant, affects not only cherry trees, but also cherry, plum, apricot, cherry plum and even hawthorn trees. This is a golden-green bug, 5.5 to 10 mm long, with a purple metallic tint. The larvae are white, dotted with sparse red hairs, with a brown head and brown mouthparts. Weevils cause damage to the generative organs of stone fruit crops even before sap flow begins - tree buds dry out and crumble. An invasion of the cherry borer can lead not only to loss of fruit yield, but due to the death of leaves, the trees themselves may also perish.

The fight against the cherry weevil should be carried out by all possible means - preventive, agrotechnical, folk, biological, and if necessary, then chemical:

• in the fall, clean the tree trunks of old exfoliated bark, then burn the plant remains and clean the trunks with a solution of lime;
• Also remove fallen leaves from under the trees into a compost heap or burn them;
• soil in tree trunk circle be sure to dig up trees;
• during the period of swelling of the buds, shake off the beetles onto white paper or cloth spread under the tree and destroy them;
• during fruit ripening, collect and destroy carrion so that the larvae do not go into the soil;
• immediately after flowering, if you find more than 8 beetles on the tree, treat it with any of the chemicals we described.

Plum weevil

This bronze-colored bug with a metallic sheen is up to 45 mm long, all covered with short thick hairs, for its appearance also called a copper pipe maker. Not only plums suffer from it, but also sloe, apricot, cherry, and sometimes apple, hawthorn, rowan and even currants. Harm is caused both by adult insects, which consistently damage buds, buds, flowers, pedicels, young fruits and leaves, and by larvae that develop in fruits.

The fight against copper pipeweevil is carried out in the same ways as against the cherry weevil, and among the chemical preparations, pyrethroids and organophosphorus compounds are most effective against it - for example, Actellik, Fufanon or Bazudin.

Getting rid of weevils in an apartment is quite simple, but to combat it in large granaries you have to use powerful insecticides

Characteristic

The weevil has a small head, which extends into the rostrum and ends in a gnawing oral apparatus. The head has antennae curved at an angle. There are also wings: on the upper ones there are deep grooves located in the longitudinal direction, the lower ones are membranous.

The female granary weevil gnaws a hole in the grain, makes a clutch and covers the exit site with secretions. In this case, the clutches are quite large and the number of eggs can reach 300 pieces. Development in the egg lasts from 6 to 12 days, after which a larva emerges from it. The process of development of the young continues in the same grain where the clutch was made - the larvae gnaw out the insides of the grain, pupate there and emerge only after turning into an adult.

On a note! Due to the fact that the weevil spends all stages of its development inside the grain, it becomes much more difficult to combat it!

In this case, the duration of the development period of the weevil beetle will depend on environmental conditions:

• 80 days at 17°C;
• 70 days – 20 °C;
• 34 days – 25 °C;
• 30 days – 28 °C.

If a weevil is found in cereals, it is advisable to throw away the contaminated product and immediately address the issue of how to deal with the invasion of these insects. If this is not done in time, then with its gnawing mouthpart the pest will easily overcome such an obstacle as the package shell and make its way to other cereals.

How to protect food in the kitchen?

If you find weevils in the kitchen, you should first carefully sort through all bulk products.

Important! There is no need to select a pest from cereals and then use it as food, since the larvae during their life processes secrete a special secretion, which is a carcinogen!

Since weevils cannot tolerate cold, you can get rid of them in the kitchen by freezing them. To do this, cereals in which the beetle was not found, but were located next to spoiled products, are placed in the freezer for two days. If the infection occurred in winter, the grain can be taken out to the balcony.

It has been established that the weevil dies when the temperature rises to +50°C, so if freezing for some reason cannot be used, the beetles can be removed in another way. Place the cereals in the oven and heat them at +60°C.

But the fight against the weevil does not end there. The next steps will be as follows:

• after heating or freezing, the cereals should be distributed into glass or plastic containers and stored under a tight lid;
• In the same containers you can put one peeled clove of garlic - its smell remarkably repels the pest;
• Place lavender flowers or regular lavender flowers on the shelves of kitchen cabinets and cabinets. Bay leaf– these plants are repellents;
• periodically wash shelves and interior wall surfaces kitchen set soap solution, then wipe with a weak solution of vinegar.

And at the same time, do not make too many reserves.

Granary protection

If in the kitchen conditions very simple measures are used to combat weevils, then for the treatment of warehouses and barns they are often used chemicals. For many years, disinfection, which can be gas or aerosol, has remained a radical measure for destruction. Moreover, the processing is carried out not on its own, but exclusively by special organizations that have permission to do so.

Disinfection using aerosols is used both inside warehouses and in areas adjacent to them. IN in this case preparations to combat weevils in grain can be as follows:

• "Aktellik";
• "Karate";
• "Arrivo";
• "Fufanon."

On a note! Aerosol treatment shows very good results even in conditions of unsealed barns, however, after it, until the permitted sale of cereals, it is necessary to withstand a fairly long period of time.

But gas disinfection shows the best results. To carry it out, ethyl bromide gas or tablets are used, which very successfully help get rid of weevils in grain:

• "Phallus";
• "Phostoxin";
• Degesh Plates;
• "Foscom";
• "Magtoxin"

Before treatment, the room must be sealed, and fumigation is carried out by special teams using appropriate equipment.

In large barns and other granaries, freezing is also used. But here, again, additional funds are required, so a similar procedure is carried out only for grain that is considered particularly unstable.

Man began to grow grain more than 10 thousand years ago. And even then, in those ancient times, he was faced with the fact that small bugs, having settled in a storage facility, are capable of, if not destroying, then damaging a significant part of the harvested. Therefore, it is important to get rid of them as soon as possible. The fight against these pests has as long a history as the cultivation of grain crops itself.

The barn weevil is one of the most dangerous and widespread grain pests.

Characteristic features of weevils

The barn weevil is a brown, almost black beetle. Average length its body is 2-4 mm. The barn weevil does not fly, although it has hard, underdeveloped wings. The beetle got its name because of the special shape of the structure of the head: from the body to the “nose” it narrows, forming the so-called rostrum with a powerful gnawing mouthpart at its end. Thanks to this unique weapon, the granary weevil easily penetrates the hard shell into the soft tissues of the grain.

The beetle is voracious; it has no obvious preferences in choosing food - it absorbs reserves of any cereals and legumes. The biggest damage comes from weevil larvae. The larva looks like a worm, but this “worm” is endowed with short legs on the front of the body and a head armed with powerful mandibles. The body of the larva reaches 4 mm in length.

After emerging from the egg, the larva bites into the grain on which it feeds, leaving only the shell intact.

Immediately after emerging from the egg, which the female places at the very bottom of a specially gnawed channel in the grain, the larva begins to devour the surrounding grain tissues to the outermost hard shell. The “saturation” period lasts from a month to three, depending on temperature conditions. Then it becomes a pupa, and 1-3 weeks later - an adult beetle that gnaws outward from the grain.

The beetle has a considerable lifespan - about one and a half years. During her life, one female can lay up to 250 eggs. The longer a beetle goes unnoticed in food, the more difficult it is to get rid of it.

The rice weevil is recognized by many experts as more dangerous look. Externally, it is slightly different from the barn in color - it is matte Brown with two reddish spots on the wings, and in size - the rice weevil is smaller, its maximum body length is 2.8 mm. But these are secondary distinguishing features. The main difference is that the rice weevil flies well, this gives it a huge advantage and increases its danger.

Ways to get rid of weevils

The weevil can get into the apartment along with a bag of flour or grain, which long time were stored in warehouses and then went on sale. If at least one beetle is accidentally discovered in the kitchen, there is already a whole colony of them somewhere and you need to urgently decide how to get rid of the pests. You need to start fighting the beetle immediately, before it destroys all supplies.

The barn weevil is one of the most dangerous pests grain reserves

The fight against weevils is carried out according to a simple scheme of actions:

1. It is necessary to check all stocks of bulk products - cereals, pasta, flour, tea, coffee, cocoa, spices, etc. Products that have been heavily infested should be thrown away without regret, since the secretions of these beetles and their larvae can cause serious harm to human health .
2. Grains and products in which the weevil was not found, and all recently purchased ones, should be placed in the freezer for several days. Cold effectively helps fight weevils. These insects are heat-loving; at +5°C they fall into torpor, and at -5°C the beetles and larvae die within a few days.
3. Another means of combating weevils is heat. This beetle can withstand temperatures of +40°C for no more than two days, and at higher temperatures it dies in a few hours. Products that require preventive heating are placed in the oven and kept there at a temperature of 50-60°C for 6 hours. This will get rid of the beetles and their larvae.
4. After treatment with cold or heat, the products must be poured into hermetically sealed glass or plastic containers into which the pest cannot penetrate.
5. As folk remedy Garlic is often used to repel weevils. A few cloves are placed in each container of cereals or pasta. It is important that the garlic cloves are well peeled, but the pulp is not damaged - damaged cloves quickly give off their smell to the grain and rot themselves. The same thing happens if you cut the garlic cloves into slices. An intact clove retains its repellent odor for a long time and does not rot.
6. For preventive purposes, all furniture where food is stored is thoroughly cleaned from time to time using a soap solution, and then washed off with water to which a little vinegar is added. After cleaning, the furniture is dried and ventilated.
7. To repel insects, they are placed in cabinets and shelves with strong odor lavender flowers and bay leaves.

Detection of pests and control of them will be easier if you follow the rule - avoid creating abundant stocks, which will be stored for a long time without movement, becoming a comfortable habitat for beetles. It is easier to remove beetles when stocks are compact.

MethodsAnd.

Almost all of us have encountered pests such as weevils. In fact, there are several thousand species of bugs in this family. These pests destroy garden plants, horticultural crops, and when they settle in barns, they eat and spoil grains, cereals, flour, etc. Equipped with a long proboscis, pests love to settle in food. If there is not a lot of cereal, but it is a pity to throw it away, you need to rinse it under powerful water pressure and bake it in the oven. However, you just have to throw out the flour. If a large colony of weevils has settled in the products, then you will have to get rid of such products completely, since the cereals will contain not only adult bugs, but also their larvae. Therefore, preparing dishes from contaminated products is dangerous.

The granary weevil is one of the most dangerous and widespread grain pests. Overwinters in grain warehouses. When feeding, an adult beetle (imago) damages various grains and their processed products. Larvae can develop in the grain of wheat, rye, barley, oats, rice, corn, buckwheat, millet, and sometimes in pasta and caked flour. The beetle is brown in color, 2.1 - 4.0 mm long, does not fly. Life cycle lasts 28–36 days. When the beetle reproduces massively, “self-heating” of the grain can occur. The development of larvae stops at temperatures below 4° or grain moisture below 12 percent. Usually produces 3–4 generations per year. Adult beetles live from 7 months to 2 years. The female lays up to 300 eggs. The development of the larva and pupa takes place entirely inside the grain, then the beetle gnaws through the exit hole. Grains damaged by weevils become easily accessible to other secondary types of stock pests - insects and mites. The grain damaged by it in case large quantity Weevil is unfit for food and causes digestive upset. Heavily infected grain becomes hygroscopic and is subsequently subjected to self-heating and rotting.

Control measures. Strong heating (up to 50–60°) or freezing (up to -10°) of infected grain. Beetles can withstand temperatures of -5° for 26 days, 38–40° for 1–2 days, and at 50° they die after 6 hours. Storage rules must be followed: store grain separately different humidity And different terms cleaning; carefully clean the container from debris and remnants of old grain stocks; control the humidity of stored grain (not lower than 14 percent), destroy contaminated stocks. In case of severe infection it is necessary grain fumigation and premises with drugs: ), .

Treatment of premises with the listed drugs is carried out only by organizations licensed to carry them out.

Rice weevil (Sitophilus oryzae). Very similar to the granary weevil, but smaller (length 2.0–3.2 mm) and has four yellow spots. In addition, the beetle flies well. The larvae develop in cereal grains (wheat, barley, rye), as well as in rice, oats, corn, peas, and edible chestnuts. Adult beetles feed on flour, cookies, crackers, pasta, and bran. Larvae cannot develop in them. The beetle produces 2–3 generations per year and lives up to 240 days. The female lays 380–575 eggs. The larva and pupa develop inside the grain. With humidity less than 6.7 percent. their development stops.

Control measures are the same as for the barn weevil. The beetle is more sensitive to cold than the barn weevil; it can withstand temperatures of -5° for 4 days, and 5° for 21 days.

Grain borer (Rhizopertha dominica). The beetle is brown in color, its length is 2.5–3.0 mm. Flies well. The beetle and larvae actively drill through the grain and leave a very noticeable hole. The beetle larvae can completely eat the kernel of the grain and leave only its shell.

Beetles and larvae feed on cereal grains (wheat, barley, rice, millet), broken peas, lentils, breadcrumbs, and dried potatoes. Grains and products severely damaged by them have a specific sweetish, honey-like smell. The beetle produces up to 4 generations per year. The female lays 300–500 eggs and lives up to 390 days. The beetle's life cycle lasts from 34 to 55 days. At temperatures below 23° the beetle does not reproduce.

Control measures. Strong heating or freezing of contaminated grain and products. The beetle is cold-resistant: at -5° it dies after 28 days, at -5° - after five days. In case of severe infection, fumigation is carried out.

Methods and means of controlling weevils and other pests.

Prevention:

steaming the soil, proper watering, mulching, sanitation;

· pruning lower leaves that touch the ground or other plants helps reduce pest access to the plant.

Physical control - used mainly when there is not a significant amount of the pest.

At night, and sometimes after sunset (in cloudy weather), weevils can be found on the leaves. You can spread a white cloth and hang the plant over it. Adult weevils will fall onto the fabric where they can be easily seen and collected. The procedure must be repeated at intervals of a week, in the daytime (preferably in the sun).

It is effective to use sticky tape for catching flies, which is placed on the plant as the beetle moves, and there should be no free passages not protected by the tape. Keep in mind that the trunk (parts) of the plant must be protected from direct contact with the sticky substance. You can put cellophane under the adhesive tape. Traps can be made from burlap or crepe paper and placed under the plants. Take burlap (paper) and make folds on it, fix them, place the burlap on the soil near the base. Weevils will hide in the burlap or paper during the day and thus become trapped. In the evening, before the weevil begins to move, the traps are collected and destroyed.

Chemical control.

In specialized stores you can find the appropriate drugs against weevils - insecticides. These drugs should be diluted in water only according to the instructions. Spray the solution on each of the affected areas. It is recommended to treat areas with insecticides in early spring, before sap flow, and also in growing season plant development at least a couple of times.

Cweevil control products. Against adult beetles in case of damage to seedlings, treatment is carried out with one of the following insecticides.

K. s. (lambda-cyhalothrin, 106 g/l, + thiamethoxam, 141 g/l) - 0.18 l/ha.

Common granary weevil ,
grain elephant

Latin name - Sitophilus granarius L. (syn. Calandra granaria L., Calandra laevicosta Philippi & Philippi, Curculio pulicarius Panzer, Curculio segetis Linnaeus, Curculio unicolor Marsham, Sitophilus remotepunctatus Gyllenhal)
Systematic position: Order Coleoptera (Coleoptera L.), family Weevils (Curculionidae Latreille), genus Granary weevils

Morphology and biology. Imago. The body length of the beetle is 3.5-4.5 mm. Body size varies significantly (depending on the food on which it evolved). The body is narrow, cylindrical, shiny. Young beetles are light brown, old ones are almost black. The small head is elongated into a long thin rostrum, at the end of which gnawing-type mouthparts are placed. The antennae are curved at an angle. Pronotum with rough oblong pits, upper wings with deep longitudinal grooves, fused. The lower membranous wings are not developed - the beetle cannot fly. The female's abdomen is straight in profile; the anus is in the form of a straight transverse slit. In the male, the last segments of the abdomen are curved downwards and the anus is in the form of a curved slit. The female usually gnaws a shallow hole in the grain near the embryo, at the bottom of which one egg is placed. The fertility of a female weevil is about 200-250 testicles. The beetles of the new generation, after the outer cover has hardened, after 2-6 days, gnaw a round hole in the grain shell and go outside. They feed by gnawing out the softest parts of the grain, thereby spoiling a significant amount of grain throughout their life. The beetle avoids illuminated places. At the slightest shock, it falls into a stupor, pressing its antennae and legs tightly to its body. In the southern regions, in the conditions of granaries, the granary weevil can produce 2-3 generations during the year, and in the central regions - 1-2. Beetles, larvae and pupae overwinter inside grains. Beetles can also overwinter in crevices and cracks in floors, walls, crawl spaces and other similar places. Distributed with all types of damaged products. Especially often with warehouse equipment, grain cleaning machines that have not been cleared of old grain residues, and have not been destroyed with sweeps and unusable grain waste. Egg. A newly laid egg is transparent, dirty white, and has a regular ellipsoidal shape; Over time, this correctness disappears. Its length is 0.6-0.75 mm. Width – 0.3-0.4 mm. To protect it from drying out and predators, the laid egg is covered with mucus, which quickly hardens in air. Larva. Legless, fleshy, worm-like, about 3-4 mm long, white, with a brown head. Immediately after hatching from the egg, the larva bites into the grain, where it spends its entire life, eating away almost all of its contents. doll. The shape resembles an adult beetle, white, transparent, 3-5 mm long. In feeding areas, larvae that have completed development form a cradle, in which they transform into a pupa, shaped like an adult beetle. The development of the pupa lasts 7-22 days (depending on air temperature). Ecology. Optimal conditions for the development of the weevil in grain are grain moisture of 14-16%, air humidity of 75-95% and temperature of about +25 o C. The duration of development of the pest from the moment of egg laying to the imago depends on temperature and humidity. (At +17 o C development lasts about 80 days, at +20 o C – 70 days, at +25 o C – 34 days and at +28 o C – 1 month). At room temperature and the presence of food, the beetle can live for more than a year (at a temperature of +10...+12 o C - 28 months). At a temperature of +5...+10 o C, beetles stop feeding, and at +3 o C they fall into cold torpor; at temperatures below 0 o C, weevils gradually die. Lack of moisture inhibits the development of the weevil, and a humidity of 11% is detrimental to it. Spreading. Everywhere. Damage. Economic importance. When feeding, an adult beetle (imago) damages various grains and their processed products. Larvae can develop in the grain of wheat, rye, barley, oats, rice, corn, buckwheat, millet, and sometimes in pasta and caked flour. Grains damaged by weevils become easily accessible to other secondary types of stock pests - insects and mites. Grain damaged by it in the case of a large number of weevils is unfit for food and causes digestive upset. Heavily infected grain becomes hygroscopic and is subsequently subjected to self-heating and rotting. Control measures. Preventive. Preparation of storage facilities before receiving and placing grain for storage: cleaning and subsequent disinfestation by wet or aerosol treatment; comprehensive inspection of all objects for contamination. Preparing grain: drying grain to a dry or medium dry state, cleaning from impurities and broken grains; maximum reduction in grain temperature; spraying grain with contact insecticides. Insect and mite infestation must be monitored continuously. Fighter. Cooling of grain and products, as well as heating of grain at established modes leads to the death of pests, and cleaning ensures a reduction in infestation. Fumigation with preparations based on hydrogen phosphorous (phosphine) when moving, under a synthetic film, in a fumigation chamber. Spraying grain with contact insecticides during movement (aqueous solutions of preparations or directly with emulsion concentrates).

Information sources:

1. Boldyrev V.F., Bukhgeim A.N., Popov P.V. "Basics of protecting agricultural plants from pests and diseases." "Selkhozgiz", Moscow, 1936
2. Goryainov A.A. " Barn pests and the fight against them." "New Agronomist", Moscow, 1924.
3. Maslov M.I., Magomedov U.Sh., Mordkovich Ya.B. "Basics of quarantine disinfection." "Scientific book", Voronezh, 2007
4. Osmolovsky G.E., Bondarenko N.V. "Entomology". "Spike", Leningrad, 1980
5. Sokolov E.A. "Pests of stocks, their quarantine significance and control measures." "Dimur", Orenburg, 2004
6. Feydengold V.B., Alekseeva L.V., Zakladnoy G.A. “Measures to combat grain losses during procurement, post-harvest processing and storage at elevators and grain receiving enterprises.” DeLi print, Moscow, 2007.
7. Yakovlev B.V. "General entomology". "Higher School", Moscow, 1974