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How to deal with whiteflies on tomato seedlings. How to get rid of the whitefly in the greenhouse with folk methods? Whitefly on tomatoes control methods

The whitefly is one of the most dangerous pests of tomatoes. After getting into favorable conditions, insects quickly increase in number, weaken plants, and become the cause of viral and fungal diseases. In greenhouses inhabited by pests, good harvests can not be.

To prevent this from happening, it is important to take timely measures to destroy whiteflies. Otherwise, insects will settle on the site for a long time, year after year destroying all the results of labor.

There are more than 1500 whitefly species in the world, 20 of which are distributed in Europe. Tomatoes are mainly affected by the greenhouse (greenhouse) whitefly.

This insect is native to South America, where it was first recorded as a pest of tomatoes in 1870. Today, the "enemy" is listed on all continents. In our climatic conditions, it mainly lives in greenhouses and indoors on ornamental and vegetable plants. Occasionally, open ground tomatoes can also be affected.

The whitefly is a very small insect, up to 3 mm in length, with a light yellow body with white wings and grayish legs. The life span of a female is 30 days.

During her life, she lays 85-130 eggs on the underside of the leaf, placing them in 10-20 pieces in the form of a ring. The eggs are initially light yellow in color, turning black in 10 days.

After 12 days, larvae with legs and antennae emerge from them. They move around the leaf in search of a favorable place. After sticking to the leaf, the legs lose and take the form of flat light green scales 0.6-0.9 mm in size. So in a stationary state, the larva feeds on the juices of the plant.

Soon the larva passes into the nymph stage. Its surface is covered with a wax coating, which reliably protects against insecticides. By the end of development, the larva is covered with puparia, and after 13-15 days winged individuals fly out of the pupa.

In the conditions of year-round greenhouses, the whitefly gives 10-16 generations. Survives the winter in shape adult or a puparia-covered pupa in the surface layers of the soil or plant debris.

Maliciousness

Larvae and adults feed on the cell sap of tomatoes, depriving plants of nutrients. The leaves turn yellow, and fall off if severely damaged.

A particular threat is posed by larvae that suck out the juices of the culture more than they need. At the same time, they secrete sugary substances, on which soot fungi (cladosporium) subsequently settle. This leads to a decrease in photosynthesis and disrupts plant respiration. With a strong defeat, the death of a tomato is possible.

In addition, whiteflies carry viruses. Many of them are incurable, become the cause of epiphytosis, the death of a significant part of the tomatoes.

Causes of appearance and conditions for development

Initially, whiteflies enter the greenhouse with infected plants. Rarely is there another option. Together with air currents, insects are able to overcome impressive distances.

Migration often occurs due to a change in the previous habitat conditions: when treating neighboring areas with chemicals or settling insects - natural enemies whiteflies.

In the future, the growth rate of the pest colony is facilitated by: a combination of high humidity and air temperature, excessive planting density, lack of ventilation of the greenhouse and nearby compost heaps.

The ideal air temperature for whitefly breeding is +21°C…+27°C, air humidity is 60-75%. Wintering adults and pupae die at -12°C.

Signs of a pest

Very often, the appearance of a pest in a garden with tomatoes goes unnoticed. Insects are small, nest on the lower part of the leaf, eggs and larvae are difficult to see at all.

External signs of colonization of tomatoes by whiteflies appear only with an increase in the colony.

Obvious signs:

  • growth inhibition of tomatoes;
  • the appearance of subtle white and yellowish spots on the leaves;
  • numerous punctures on the surface of the sheet;
  • sticky coating and light tubercles on the underside of the leaves.

If you touch or just shake the stem of a tomato, you can see a large number of flying white insects. They look like moths, but several times smaller.

Mechanical methods of dealing with whitefly

It is quite possible to get rid of the whitefly by mechanical methods, while the colony of pests is not numerous. Before starting work, it is useful to reduce the air temperature in the greenhouse to +10°C. A cool atmosphere inhibits pests. Whiteflies become immobile and are easier to remove.

Washing with water

First, the tomatoes are washed with water from a watering hose. The soil with downed adults is loosened by 1-1.5 cm and sprinkled with peat. After the leaves of tomatoes are washed with soapy water.

Manual removal

Collecting whiteflies by hand is quite difficult; at the slightest touch, insects scatter in different directions. The best time for this - the coolness of the early morning, in such conditions the pests are less mobile.

Many gardeners use a vacuum cleaner for manual harvesting. It sucks up flying insects well.

Traps

The whitefly sees colors and is strongly attracted to yellow. This feature of the pest is used in traps. You can buy a ready-made glue trap at a garden store. For example, the company "Bona Forte". Adhesive tapes of firms: "Fumitoks" or "Moskitol".

You can make a trap yourself. The basis is cardboard, plywood or plexiglass. They are cut out (size 30 X 40) and painted in bright yellow. Then mix the components of the adhesive base in equal proportions:

  • Castor oil,
  • petrolatum,
  • pine rosin.

The mixture is kept in a water bath until an even consistency is obtained. Glue is applied with a brush on cardboard. Traps are hung in places with the greatest accumulation of pests.

The method is quite effective. At the slightest shaking of the bushes, whiteflies take off, rush to the yellow square and stick. One trap is enough for an area of ​​10 m², only you need to regularly wash off adhering insects warm water.

Fumigation

Smoke bombs are used after harvesting and destruction of plant residues. Before fumigation, the greenhouse is sealed as much as possible, all surfaces are moistened. Set fire to sulfur bombs in an amount calculated on the area of ​​​​the room, and leave for 3 days. Then the greenhouse is ventilated.

How to get rid of folk remedies

For best results, mechanical methods are combined with the processing of tomatoes with folk remedies. These funds are indispensable during and 20 days before the fruiting of tomatoes, when chemicals cannot be used.

  1. Soap solution. Laundry soap (20 g) is dissolved in warm water(1 l) and whip the foam. Wipe the underside of the leaf plate affected by the larvae with a soft sponge.
  2. Tobacco. Tobacco is removed from 20 cigarettes and poured into 1 liter hot water. Insist 5 days and filter.
  3. Yarrow. Fresh grass (300 g) is crushed, poured with water (3 l) and infused for 3 days.
  4. Dandelion. Crushed rhizomes (100 g) and leaves (100 g) are poured with 3 liters of water and infused for 3 days.
  5. Garlic. Chopped garlic (150 g) is poured into 10 liters of water, insisted for 1 day and filtered.

Before use, 20 g of laundry soap is added to each infusion.

Folk remedies have a short protective effect. Spraying of tomatoes is carried out every 5-7 days up to 6-7 times. With such a multiplicity, even numerous colonies can be destroyed.

Biological methods suitable for greenhouse

The best and absolutely harmless alternative to chemicals is biological agents. This is the settlement in the greenhouse of insects and fungi - entomophages of the whitefly.

encrasia

Encrasia females lay eggs in the bodies of whitefly larvae, the hatching offspring feed on their contents. Whitefly larvae die and mummify.

Settlement of the entomophage in the greenhouse is carried out immediately after the pest is detected. Cards with mummified encrasia are placed evenly over the entire area. For prevention, 5-10 individuals per 1 m², with mass destruction 15-30 individuals per 1 m². If necessary, the procedure is repeated after 7-12 days.

Macrolophus

This is a predatory bug that feeds on whitefly larvae. During the period of life, one female bug destroys up to 2500 pest larvae. Upon detection of mass colonization, 4-5 individuals per 1 m² are released, for the prevention of -1 bug.

lacewing

Only lacewing larvae lead a predatory lifestyle. They are very voracious, one larva destroys up to 600 whiteflies. Since female lacewings are very prolific, colonizing the greenhouse with this predator gives good results.

Goldeneye is used at the stage of second instar larvae. During mass colonization by a pest, 100-150 larvae per 1 m² are released into the greenhouse.

Ladybug

Predatory ladybugs and their larvae feed on adults, larvae and whitefly eggs. During the day, the insect destroys up to 100-120 pests.

To attract ladybugs dill and other umbrella plants are sown in the greenhouse nearby, dandelion and yarrow are left to grow. The first generation of ladybugs can be caught in the meadow, and later provide them with conditions for shelter for the winter. Insects hibernate under the dry bark of trees and fallen leaves.

Verticillin

This is a biological preparation based on the entomopathogenic fungus Verticillium lecani. It grows into the body cavity of larvae and adults, releases toxins and causes their death.

Dissolve 25 ml of culture liquid in 1 liter of water. Tomatoes are sprayed 3 times with an interval of 7 days, carefully processing the underside of the leaves.

Chemical Methods

If the whitefly colony is numerous and threatens the well-being of the entire site, the use of insecticides is indispensable. But there is one problem. Literally after one treatment, the surviving whiteflies can acquire resistance to the active substance of the drug.

Thiamethoxam

Preparations based on this active substance are applied to the soil. It is quickly absorbed and distributed throughout the plant. After 1 day, the pests die. The protective action lasts 2-4 weeks. Hazard class - 2-3.

Preparations:

  • "Aktara" VDG (watering under the root with an aqueous solution (1 g / 10 l), consumption of 1 liter per 1 m² or 25 pots);
  • "Doctor" briquettes (2-4 briquettes are applied for each plant after abundant watering).

These are the leading preparations against the whitefly, and it is they that should be used primarily in protected ground conditions.

Acetamiprid

Penetrates into plants through roots and vegetative organs. After 1 hour causes the death of pests. The period of protective action is 21 days. The drug "Mospilan". Spraying with an aqueous solution (5-8 g / 10 l).

Imidacloprid

It has a general toxic effect on pests, causes their death in 1 day. The period of protective action is 14-21 days. Hazard class 3. Almost all preparations are applied by spraying.

Preparations:

  • "Biotlin" VRK (solution 5 ml / 10 l, consumption 10 l per 100 m²);
  • "Commander" VRK (solution 5 ml / 10 l, consumption 10 l per 100 m²);
  • "Commander Maxi" VDG (solution 1.5 g / 10 l, consumption 3 l per 1 m²);
  • "Iskra Zolotaya" VRK (used only during the period of mass colonization of the whitefly, solution 5 ml / 10 l, consumption 10-30 l per 100 m²);
  • "Spark" TAB (introduced into the soil for seedlings, the amount depends on the volume of the container, consumption according to the instructions);
  • "Tanrek" VRK (solution 5 ml / 10 l, consumption 10 l / 100 m²);
  • "Confidor Extra" VDG (solution 1.5 g / 10 l, consumption 1 liter per 10 m²).

Manufacturers note that the use of these drugs does not cause pest resistance. But in practice this is not always confirmed.

Pirimiphos-methyl

Apply by spraying, pests die within a day.

Preparations:

  • "Aktellik" EC (solution 20 ml / 10 l, consumption 2 l / 10 m²);
  • "Phosbecid" EC (solution 10 ml / 10 l, consumption 2 l / 10 m²).

The period of protective action is 10-15 days, hazard class -2.

Cypermethrin

It quickly paralyzes all organs of pests, whiteflies die in a day. Hazard class 3.

Preparations:

  • "Inta-Vir" TAB (solution 8 g / 10 l, consumption 2-3 l per 10 m²);
  • "Iskra" TAB (solution 10 g / 10 l, consumption 2 l per 10 m²).

The period of protective action is 10-15 days.

Malathion

The protection period is 7-10 days. The substance is applied by spraying.

Preparations:

  • "Fufanon" EC (solution 10 ml / 10 l, consumption 1.5 l / 10 m²);
  • "Karbofos" SP (60 g / 7 l, consumption 1 l / 10 m²);
  • "Kemifos" EC (solution 10 ml / 10 l, consumption 1.5 l / 10 m²).

Whiteflies quickly develop resistance, including to pirimiphos-methyl.

Pyrethrum

Insecticide in the form of an aerosol. Hazard class 3. Spray onto the surface of the plant from a distance of 30 cm. The treatment is carried out in the morning or in the evening with diffused lighting in a room where there are no drafts and wind currents.

After the first treatment with any drug, it may seem that the pests have completely disappeared. It is not always so. Very often, some insects fly away, hide and lay eggs. After a while, a new numerous colony appears, already resistant to the drug used.

Therefore, treatment with drugs should be carried out in 2-3 visits. Each time it is better to use drugs with a new active substance.

If the whitefly appeared on tomato seedlings at home, the plants must be isolated from indoor flowers. The use of toxic chemical substances in an apartment is undesirable. An exception is preparations for irrigation under the root or in the form of briquettes, which are added to each container.

But more often, gardeners use all mechanical methods and processing with folk remedies. It is impossible to bring seedlings with pests and larvae into the greenhouse.

When planning the processing of tomatoes in open ground weather conditions and ambient temperature are taken into account. Optimum temperature air for working with insecticides +12°C…+22°C. Cloudy day but no rain strong wind. If the weather is sunny, then spraying is planned for the evening or morning hours.

Spray with chemicals during abundant flowering no tomatoes. This leads to mass death of bees. For the same reason, before processing, you need to remove all flowering weeds that grow near the garden.

The greenhouse is well ventilated until condensation is eliminated from the structures and leaves of plants. The air temperature is reduced to the optimum.

The work is carried out with a high-quality sprayer, which gives a fine drizzle. The leaves and stems of tomatoes should be moistened on all sides, sprayed and the soil near the bush.

Work in closed clothes, gloves and a respirator. The maximum contact time with insecticides is 1 hour.

The immunity of tomatoes weakened after being damaged by a pest needs to be strengthened. To do this, remove severely affected lower leaves. Tomatoes are sprayed with biostimulants: Epin, Immunocytofit, Novosil, Agat 25.

Calcium ions have a positive effect on the synthesis of proteins that help the plant survive stress. Therefore, foliar and root dressing calcium.

You can find some gardener tips on how to deal with whitefly by watching the video.

Prevention

The risk of whitefly infestation of tomatoes can be reduced. For this, a number of simple measures are used:

  • the soil is dug deep;
  • destroy all plant debris, weeds in the garden and near it;
  • the greenhouse and soil are disinfected with solutions of copper sulfate or 40% formalin;
  • they freeze the soil in the greenhouse in winter: they remove removable structures, open doors and vents in cold weather;
  • acquiring the leaves of seedlings, they are examined;
  • the compost pit is located away from the greenhouse;
  • control the temperature and humidity of the air (according to the requirements of tomatoes);
  • tomatoes are planted according to the scheme recommended for the variety;
  • place traps in places where pests can penetrate (near windows, doors);
  • fine meshes are installed on the windows and doors of the greenhouse;
  • any plant that is brought into the greenhouse is examined.

Preventive spraying will help prevent the appearance of pests. To do this, you can use any herbal infusion recommended for treatment.

Most problems can be easily avoided if you take the time to inspect your tomatoes every day. Often gardeners notice disease or pests on tomatoes when the attack shows clear signs on dying plants. As a result, the cost of labor and money increases significantly.

Some gardeners are sure - a reliable means of protection against pests - greenhouses. However, it is not. A greenhouse can really protect plants from pests, but not from all, but only from a small part. For example, the building will not save from the whitefly. This is a small moth (its size does not exceed 1-2 mm) white color. They run in "packs". That is, your landings will be attacked not by one small butterfly, but by several hundred. Despite its small size, the pest causes simply irreparable damage and is able to destroy the entire crop that you have planted. Tomatoes are especially susceptible. This happens as follows: the whitefly feeds on the sap of plants, sucking it and seedlings, it dooms them to certain death.

How to understand that the plant is suffering from whitefly? It just starts to fade. The leaves curl up and wither. Small black spots appear (places from which the moths sucked the juice), you can also notice the pests themselves, in the advanced stage their population is so large that these white bodies are simply impossible to lose sight of. In addition, a white coating remains on the plants (especially when whiteflies are just starting to settle in the plantings), it can be detected when examining the plant (this should be done regularly).

Favorite conditions for the existence of whiteflies: high humidity air, high temperatures, windlessness. Very similar to those very greenhouse conditions, isn't it? Therefore, the mythical statement that the greenhouse is the enemy of pests is really a myth.

Another danger posed by moths is the liquid they secrete (honeydew). This is an ideal place for the development of fungus, so the damage from the pest can be double: sucking the juice from the plant and infecting it with a fungus (sooty fungus).

It is necessary to fight this infection, otherwise you can be left without a crop and with an infected area. It is quite difficult to eradicate midges from the site, however, when applying complex measures, this is quite realistic. The main thing is to know how the correct and effective measures to combat the hated whitefly. After reading this article, you will definitely find useful ways for yourself.

How to deal with whitefly

Everyone knows that the methods of combating any pests are divided into three groups: mechanical measures, folk ways and chemicals.

Through mechanical methods possible to delete big pests(e.g. slugs) or insect pests. All you need is your physical strength. Usually, these methods consist of manually picking up pests, digging traps, and installing various repellent devices. Suitable for the fight against all pests.

Folk ways- recipes for solutions that are prepared from ingredients available to everyone. They are especially popular because their effects are completely safe for both humans and plants. However, some methods are not effective.

Chemical processing produced with the help of specially designed drugs. They can have a level of toxicity that harms plants, animals, and nature's helpers (birds, bees, and others). However, now there are fewer such drugs, the most popular ones are safe. This method is more effective than others, however, it is not particularly popular.

Mechanical Measures

The only available mechanical measure here is setting traps. Such units have adhesive actions. In the store you can look at the following:

  • Argus;
  • Bona Forte;
  • Pheromones.

However, it would be advisable to use them only in small areas under crops (otherwise it is simply unprofitable financially).

If you do not want to spend money on purchased traps, you can make alternative ones at home. You will need colored cardboard (so that you can easily distinguish small moths) and glue with a long drying time (it is better to use products such as honey). Hang the received devices among the beds with tomatoes and change them as whiteflies stick to them.

In addition, glue traps are only effective on early stages appearance of the whitefly. If your plants start to die, and you can clearly see a whole flock of midges on the leaves, it's too late and it's time to move on to other measures.

Another effective method, but too expensive when it comes to large plantings - fumigators. They poison the pest by airborne droplets.

Chemicals

Insecticides will help us fight and eventually completely destroy whiteflies. These are special preparations aimed at the destruction of harmful insects, so their effectiveness is increased.

  • Karbofos. The good old remedy will indeed be effective in the fight against whiteflies. It is not so expensive: for 20 grams of funds, the price will be about 30 rubles, for 60 rubles, respectively, 60 rubles. It is also available in liquid form - the price per liter is approximately 150 rubles. Minimum consumption: 10 square meters you will need 10 milliliters of a concentrated solution (mixed in 10 liters of water).
  • Aktara. It is also a fairly popular drug, famous for its multi-functionality (capable of destroying various insects). A bag of 4 grams will cost about 105 rubles. This amount is enough to process 6-7 acres (0.6 ml diluted in 4 liters of water per 1 weave). The protective effect is about 3-4 weeks.
  • Fitoverm. Available in liquid form: 25 ml cost about 110 rubles. For 100 square meters you need 5 ml of the drug, diluted in 3 liters of water. This insecticide differs from the previous ones in that you can do several treatments at once with an interval of 15-2 days (no more than 3 times).

How to process

Remember to protect yourself when working with chemicals

To get started, choose the right drug. Dilute it with water in the proportions indicated on the instructions. Carry out the treatment with the method indicated on the package or the most suitable for you (this can be spraying or watering). Handle carefully, do not forget about the inside of the sheet (the places where whiteflies gather in heaps).

Use protective clothing, as some drugs can be harmful to humans and cause an allergic reaction if they get on the mucous membranes.

Highly important point : when treated with the same preparation 2-3 times in a row, whiteflies develop immunity, so chemicals will not have any effect on them. Therefore, you should alternate drugs.

Folk ways of fighting

  • soapy water. Dissolve a bar of laundry soap in a bucket of water. Water the plantings well, the areas around. This will not completely eliminate whiteflies, but it will help reduce their population.
  • garlic water. Crush two large cloves of garlic and mix with a liter of water. Leave for a while (half an hour is enough) and water the affected areas.

Whitefly Prevention

  • If in the air high humidity- Do not spray plants.
  • Avoid crowded plantings. Plant bushes with the correct distance.
  • Do not forget to ventilate the crop.
  • Plant only those varieties of tomato that are resistant not only to the whitefly, but also to pests in general.
  • Remember that before new landings - the soil must be prepared. Clean it from last year's residues, tops and other products.

This small butterfly can cause serious damage to a tomato grown in a greenhouse.

The whitefly is a small moth that looks like a moth.

  • The length reaches 3 mm.
  • The wings and body are painted in a whitish hue, white pollen is “scattered” on the surface, hence the name.
  • The nutrition of an adult individual and its larvae is vegetable juice, which very soon leads the plant to death.
  • First, the leaves lose their color - they become white, then gradually the whole plant dries out, the bush dies.

pest invasion

Usually, the whitefly invasion can be expected in summer, when the temperature is not lower than twenty degrees, however, frequent rains are noted.

The whitefly appears when a sufficiently high temperature is combined with high humidity.

The midge feels comfortable in the so-called greenhouse state - when at high temperature quite high level humidity. If the temperature is below ten degrees, the adult moth dies, but the eggs remain viable, they can comfortably overwinter in the hibernation stage.

Most suitable conditions regardless of the season - greenhouses, greenhouses, greenhouses.

Provoking factors

The dense plantings impair ventilation, increase humidity and, as a result, create optimal conditions for whitefly development.

The main provocateur is a gardener, that is, those conditions that, through ignorance or mistake, a person creates.

Provocative moments:

  • planting density;
  • lack of ventilation;
  • spraying at high humidity;
  • improper use of fertilizers;
  • absence of biostimulants.

Many gardeners believe that the greenhouse protects the culture from all misfortunes, especially from insects, so they often plant seedlings too close to each other. However, this opinion is fundamentally wrong, since the whitefly prefers closed spaces.

How to save a greenhouse from whitefly

The greenhouse must certainly have properly equipped ventilation.

The humidity level in the greenhouse is best controlled using an automatic window opener.

Combination of two factors - the lack of ventilation and the density of plantings provoke not only the appearance of insects, but also the occurrence of other diseases, since the bushes do not receive Fresh air, the greenhouse effect occurs. If it rains heavily outside, the humidity is high, it means that the humidity inside the structure also rises, so the plant receives enough moisture, and there is no need to additionally spray the bushes.

It is desirable to make the window in the greenhouse large in order to be able to fine-tune.

On one leaf, you can immediately see both butterflies and whitefly larvae.

Among other things, the symptoms of the lesion will be visible on the plant:

  • yellowness on the leaves;
  • drying of leaf plates;
  • the presence of larvae on the lower surface;
  • the presence of a sticky coating;
  • spots.

Primary signs appear on the sheets

Leaf plates begin to turn yellow, gradually curl, dry out, crumble. If you lift a leaf or a thick stem, you can see many translucent larvae.

Females lay eggs, from which larvae appear after a week, and nymphs appear after another 14 days.


Fighting methods

The whitefly feeds on the sap from the plant, causing the leaves to dry out.

There are mechanical, biological, chemical methods. Often people use folk methods.

Mechanical Methods

  1. Take one part of soap and six parts of water, prepare a soap solution.
  2. In this solution, a cloth is moistened, with which all parts of the culture are washed.

A solution of ordinary soap is the most affordable means of dealing with whiteflies.

Making traps

A simple trap made of yellow paper smeared with a sticky mass.

Mechanical assistance also consists in preparing traps.

It is believed that adult butterflies flock to yellow , so many farmers use this fact to catch pests.

  1. To do this, plywood, cardboard or other strong material is painted in a yellow tint.
  2. Honey, castor oil or petroleum jelly is applied to the surface of the trap.
  3. Traps are attached next to the greenhouse.

In gardening stores you can buy ready-made designs.

Whitefly night trap

To make a trap you will need:

  • plastic box;
  • foil;
  • water tray;
  • cartridge;
  • orange incandescent lamp;
  • cord.

The night trap is made from improvised material.

The workflow is very simple and clear from the photo:

We turn on the light bulb at night, and in the morning we see the result:

Biological methods

As biological methods of dealing with whiteflies, it is meant to attract insects - enemies of moths that do not pose a danger to either tomatoes or people.

Folk ways

Experienced gardeners are sure that garlic infusion repels whiteflies.

From folk remedies use garlic.

  1. For one liter of water, one hundred and fifty grams of chopped garlic, insist a week.
  2. Garlic liquid is sprayed on the culture at intervals of four or five days, until the pest is completely destroyed.

But they also prepare infusion of yarrow . Grind the grass, measure out one hundred grams, pour boiling water (1 l), insist for a day. Tomatoes are sprayed several times.

It is allowed to apply dandelion infusion . One hundred grams of grass is steamed with one liter of boiling water, left for a day.

It is necessary to separately indicate that folk remedies are effective in the initial stage of the lesion, that is, while there is not so much pest, otherwise a dubious effect will result.

chemicals

Chemical agents are mainly used in the form of purchased ready-made complexes.

Chemical control methods are the most effective.

There is an opinion that it is possible to apply common dichlorvos , however, this remedy is too toxic primarily for fruits, hurts a person .

  • use Verticillin , which is dissolved in one liter of liquid, is treated every ten days until the whitefly disappears completely.
  • Recommended drug Pegasus- processed twice with an interval of twelve days.
  • Applicable Confidor- a means of prolonged action, sprayed once.
  • Actellik available in ampoules, which are diluted in water. The procedure is carried out twice.
  • It is recommended to use tobacco dust .

Important: if the farmer uses chemicals, the dosage indicated on the packaging must be strictly observed. Among other things, it is necessary to maintain the necessary interval for neutralization after spraying.

Prevention

Preventive actions include the purchase of healthy planting material.

  1. Every year, the greenhouse is disinfected with a solution of copper sulfate or potassium permanganate.
  2. The earth is dug up, weeds, plant residues are removed.
  3. Mandatory measure - complete ventilation of the structure .
  4. If ventilation was not installed inside, after the end of the season, while the room is empty, it is imperative to provide an opportunity for ventilation.

You can often see how something similar to mold, but moving, attacks tomato seedlings from afar. It's a whitefly on tomatoes. She is a little white moth. Its size is up to 3 mm. The wings are covered with a coating that resembles powder. When adult whiteflies cover the plant, you can really think that it is covered with mold, it is quite difficult to fight it.

Signs of defeat

An adult whitefly can lay up to 300 eggs on tomatoes. Leaves turn white and sticky. In some places, black spots from a soot fungus appear. The larvae attach themselves to the back of the leaf and suck out the juice. Because of this, the leaves then dry up and fall off. The greenhouse whitefly can be found in the south of the country or in greenhouses. She "likes" tomatoes, cucumbers and small flowers. If you see her, immediately start fighting, otherwise she will easily move to other plants.

Finding it is easy:

  • The presence of translucent scales at the bottom of the sheet is the larvae.
  • The appearance of honeydew, i.e. sticky and shiny coating. Like aphids, whiteflies leave honeydew as their waste.
  • Black heel, which occurs during the development of soot fungus.
  • Also, the tomato may grow slowly, the leaves will be puffy and twisted.

Video “Whitefly”

This video shows how to deal with whiteflies in a greenhouse.

Ways to fight

You can start fighting right in the greenhouse. There are various means of struggle. One of the means is a special trap that is smeared with glue. Today it can be found in special stores or make it yourself. We take a yellow cardboard and cover it with Vaseline. Whiteflies will fly to this color and then stick. With this method, they stick around the entire cardboard - then just wipe it and apply Vaseline again. Also, the insect can be killed with an emulsion from scabies. Dilute 100 g in 1.5 liters of water and spray everything.

One more folk remedy struggle, which will help get rid of the pest - a solution of yarrow. It is necessary to grind 90 g of yarrow in 1 liter. water and leave in the shade for one day. Then strain it, and process the tomatoes with this solution.

Also, laundry soap concentrate gets rid of them well. Rub the soap on a grater and dilute it with warm water in proportions of 1:6.

An excellent remedy for whiteflies is garlic tincture. Chop 20 g of garlic, pour 4 liters. water. Infuse it for 24 hours, and then strain. Spray tomatoes with this infusion in the evening.

You can also try to save the tomatoes with a jet of water. You can try to wash off young moths with water from a hose. And after that, you should loosen the soil under the bushes.

However, before spraying, you need to clean the plant from plaque and adults. You need to spray a tomato no more than 2 times a week.

If you find the pest too late, then you will need to apply radical control methods. You will have to use chemicals. In addition, you will need to treat them not only with tomato bushes, but also with nearby plants, otherwise they may become infected.

Now there are a lot of different chemicals to combat the whitefly. Aktelik, Confior, Pegasus, etc. In the instructions you will learn exactly how, and in what proportions to use them.

Aktara is a very popular whitefly remedy. It has a long period of action (about a month or two of protection). In order to kill the whitefly, the tomato is watered with Aktara's solution under the root. Nothing more needs to be done. They feed on plant sap. The reagent, in turn, gets into it, and all pests die. In order to kill the whitefly, you should immediately make Aktara's solution, 4-5 times more concentrated than usual. In order to make the mixture “for slaughter”, we dissolve the contents of the package in 2-2.5 liters of water and pour over the tomatoes!

Confidor is a very strong insecticide. Within 2 hours after watering, the pests will begin to die. Two treatments are enough to "kill" the whitefly.

Akarin kills the whitefly spider mites and even some subspecies of root-knot nematodes. This insecticide is used for spraying. You need to moisten the leaves and get on the pest.

Spark. Produced in a variety of subspecies. Instantly gets into plant tissues and stays there for a month.

Phytoferm - kills almost all pests. It will be enough to spend just a few sprays in order to kill the whitefly.

Akkelik is another “killer mixture”. However, it is worth remembering that it has a 2nd class of toxicity and a very unpleasant odor.

Whiteflies also hate the cold, so to get rid of them, they can be moved to a colder room. They can even be caught with sticky fly tapes!

Prevention

Firstly, you do not need to do a dense sowing, as this will disrupt the air circulation, and the infection will take place at lightning speed, it will be useless to fight the pest here. It is necessary to ensure the ventilation of the plantings, and also do not spray the plants in wet weather. If possible, then lower the temperature to 10 degrees for several days, since when the temperature drops, all adults and almost all larvae die.

The fight against the whitefly can go into season. Chemicals have a very bad effect on both plants and people and even pets. Therefore, it is better to prevent the danger than to deal with it later.

Immediately after disembarkation, it is necessary to carry out folk prophylaxis with proven methods. If you decide to plant tomatoes in a greenhouse, then you need good ventilation, and the air temperature should not rise above 15 degrees Celsius.

Secondly, it is best to paint the greenhouse before planting. The earth must be removed from last year's grass, and then everything must be dug up. Do not leave compost for the winter, because this is a chic location for the winter "lodging" of the whitefly! In cold weather, you should open the greenhouse so that the pests freeze! If you purchase seedlings, then carefully check the plants!

You can still carry out autumn prevention, as folk experts advise us!

The first spraying is done right after the harvest, the next is done after the diseased plants have been removed. The tomato is treated with a 0.5% emulsion of karbofos. If you have a well-sealed greenhouse, then instead of a second spray, try fumigating with a sulfur lump. Set fire to lump sulfur and keep the greenhouse closed for a couple of days. In addition, it is necessary to do disinfection with sulfuric gas. 110 g of sulfur should be set on fire per 1 square meter of the greenhouse. Weeds should also be removed. In addition, observe the distance between vegetables. No need to plant them near the greenhouse. Vegetable greenhouses must be located at a distance of more than 10 meters from flower greenhouses.

Video “We fight the whitefly in the greenhouse”

In this video, an experienced gardener reveals the intricacies of pest control in a greenhouse.