Spider mite on cucumbers: how to deal with a dangerous greenhouse pest

spider mite on cucumbers how to fight
Spider mite on cucumbers how to fight

Hello! I just love to open a jar of pickled cucumbers in winter, boil potatoes, fry meat and enjoy all this at dinner.

But last season, my crop of cucumbers came under the pressure of a serious threat in the form of a spider mite.

And I did not immediately find the problem. She left for several days, and after returning an unpleasant surprise awaited me. I began the extermination of this pest without delay. Want to learn how to deal with a spider mite on cucumbers? How to do it as efficiently as possible? Then read the details in the article below.

How to deal with a spider mite on cucumbers

Hello, dear readers, gardeners and gardeners, lovers of tinkering with plants in the garden at home and in the country! Pests of cucumbers - today we will talk about them, and specifically in this article - about how to deal with the spider mite on cucumbers, one of the worst enemies of this beloved culture.

Important!
Like whitefly, the spider mite is particularly annoying to the cucumber culture of the closed ground. This is a small arachnid - the size of females is up to 0.5 mm, males - 0.3 mm, but with good feeding they can grow to a millimeter or more.

To our misfortune, in the last decade, an ordinary spider mite, habitually parasitizing on greenhouse crops, has added a foreign guest - a red spider mite, who also liked the Russian beds.

The mass exit of the tick after wintering (they winter in the corners of greenhouses, in the upper layer of soil, in manure, under fallen leaves) begins with the onset of heat, and becomes especially massive when the temperature of the outside air is at least 20 degrees. Moreover, they willingly use both seedlings and adult plants for nutrition.

Externally, these pests of cucumbers are egg-shaped. Adult females live 3-4 weeks, managing to lay several hundred eggs during this time. In their development, they go through the stages of an egg, larvae, two stages of a nymph and a mature phase. Moreover, they feed on plant juices in all phases, except for the egg.

How can you determine the arrival of a spider mite? It is very simple: when silver or yellow dots appear on the leaves (the females began to lay their eggs). Then these areas merge into discolored spots (the first cycle of spider mite generation has ended), necrotic areas appear on the leaves, the leaves turn yellow and dry out.

The lower, and later the upper side of the leaves affected by the spider mite is covered with cobwebs, along which the ticks move. It is extremely difficult to deal with a spider mite, this is just the case when prevention is more effective than treatment. Nevertheless, even if you did not start a fight with him, first of all you need to pay attention to the destruction of females.

And now we directly proceed to measures to combat the spider mite.It is believed that the life cycle of this parasite is highly dependent on air temperature, nevertheless, with the help of folk remedies - such as maintaining high humidity in a greenhouse (which the tick does not seem to tolerate) by spraying with warm water, digging up the soil or spraying plants with soapy water, it is far from always will be effective against them.

Against ticks, drugs called acaricides have been developed. Moreover, they act not only on live ticks, but also on their eggs. Only at the same time it is important to consider that ticks quickly get used to acaricides, because of which it is necessary to frequently change the drug used. And spider mite eggs are able to remain viable for 5 years.

Advice!
Further, I invite you, dear readers, to get acquainted with some acaricidal plants that will help in the fight against spider mites.

Aconite nosy. Roots and tubers, roots and grass insist in 70% alcohol. The extract before use is diluted with water in a ratio of 1:10, and then used against a spider mite. Plants are harvested during budding.

Hogweed(Caucasian, Siberian, bearded; montation fluffy, spotted). Against a spider mite, infusions of its dry leaves, stems and roots are used (1 kg per 10 liters of water for 24 hours).

Recipe for infusion: the crushed green parts are ground in the form of slurry with water (1 kg of the plant in 2 liters of water). The liquid part is squeezed out, squeezes of 15 liters of water are poured and after insisting for 6-12 hours, the liquid part is again separated and mixed with the solution obtained previously. Raw materials are prepared before and after flowering, and during flowering - only the aerial part.

The mustard is creeping. Against a spider mite, its infusions or decoctions are used. Recipe for infusion: pour dry crushed plants for 24 hours with water (120 g per liter) or boil for 30 minutes after 6-8 hours of infusion. The liquid part is drained and diluted with water twice before use. Harvest the aerial part or the entire plant during flowering.

Datura ordinary. Its water infusions and decoctions are also used against spider mites. The recipe for infusion: finely chopped dry plants (100 g per 1 liter) or finely ground powder from a dry plant (50 g per 1 liter) is poured with water for 12 hours. Then the liquid is filtered.

Recipe of the broth: boil for 2–3 hours in a small amount of water 1 kg of dry green parts of the plant (or 2.5 kg of dried or 3 kg of fresh plant material). After cooling, strain the broth and add up to 10 liters. Harvest during flowering the entire aerial part of the plant.

Karpezium wormwood. Seeds and dry aerial parts of plants insist 12-24 hours in water in an amount of 70-100 g per 1 liter, the filtrate is used to treat plants affected by spider mites. Harvesting of plants is carried out during the growing season, and seeds - after ripening.

Attention!
Eastern goatskin. Infusions of dry milled plants (90-100 g / l) after 24-hour exposure and filtration are used in the fight against spider mites. Harvesting of plants is carried out during the growing season.

Manchu clematis. Water infusions of fresh leaves (50-100 g / l) are effective against spider mites. Onion. In the fight against spider mites, water infusions of onion scales are used. Scale onions insist 12-15 hours. Concentration - 20 g / l.

Gray alder, makeshift alder. Water infusions (100 g / l) are detrimental to spider and root ticks. Meat red pyrethrum (Caucasian chamomile), pink pyrethrum, Dalmatian chamomile. All plant mites die from 2% aqueous suspensions of chamomile powder.

Cyanosis blue. An infusion of dry roots of 10% concentration is effective against spider mites.

What else needs to be done to defeat the spider mite:

  • Clean greenhouses and greenhouses from plant debris and destroy them.
  • Dig the soil.
  • Thoroughly destroy weeds in ridges and around greenhouses.
  • Rinse boxes and frames with 10% caustic soda solution or iron sulfate before laying greenhouses.
  • Collect and burn single damaged leaves.
  • Spray onion flakes of onion or garlic (200 g).
  • Treat 70% colloidal sulfur (50-100g), celtan (20% ke., 20 g) in the open and protected soil.

Spider mite control in a greenhouse with cucumbers

In greenhouses made of polycarbonate, glass, in greenhouses, thermoses and other types of similar designs, infections and pests are very common. This is due to the high requirements for the microclimate of the greenhouse, which is quite difficult to comply with.

But not only the temperature and humidity inside the building can cause plant diseases and pests, but also plant debris in the fall, weeds, contaminated soil and fertilizers.

In general, there are a lot of reasons, but today we are not looking for them, but methods for combating the spider mite in the greenhouse.

What is a pest?

This insect pest is red, orange, green-yellow or milky-transparent in sizes up to 1 mm. Some individuals reach a size of 2 mm, but this is extremely rare.

Insects settle in conditions comfortable for them, mainly on the lower part of the plant leaf, but then they can occupy large areas of culture. You can recognize the life activity of the spider mite by the marks on the leaves - small bright dots.

Spider mite
Spider mite

At first, these are small pest settlements, but soon ticks can fill the entire greenhouse, as they multiply quite quickly. Within a week after appearing on one plant, they can be found not only in the tracks, but also in live form, crawling along the leaves. After a while, a web appears in which young and rapidly developing colonies are located.

What harm does cucumber do?

Once in a greenhouse, insects quickly spread over its area, occupying immediately more convenient crops, one of which is just cucumbers. Insects feed on the juice of plant cells, due to which the leaves are depleted, begin to dry out and cause plants to become sick and die.

Important!
It is worth noting that the females are very active, and after 3-4 days they will lay eggs, in an amount of up to 400 pieces each.

There can be up to 20 development cycles per year, and most of all this corresponds to a suitable climate of + 23 + 33 ° C and average humidity in the greenhouse. As you can see, the greenhouse is simply ideal for the life of these pests.

How to deal with a spider mite in a greenhouse

I would like to say that this is very simple, but we can’t, because many of the usual methods of controlling insects and methods of prevention simply do not save.

According to the statements of many summer residents, and according to their own observations, spraying with water, which could raise the humidity, does not help, and ultraviolet radiation does not save, tinctures on the husks of onions or garlic, as well as laundry soap, also remain far away.

In general, it is necessary to look for more effective remedies for ticks, otherwise you can lose your crop in the greenhouse in two ways.

It is necessary to remember once and for all that any insect is able to adapt to drugs, and therefore an integrated approach should be applied, and not try to remove the pest from the greenhouse for years with a well-advertised product that does not help already from the second or third time.

Drugs on sale than to handle

We want to note right away that some of them are extremely effective, while others have a weak effect. Much here depends on the time of infection of the greenhouse, pre-treatment preparations, processing quality and other conditions.

Plant pin. A special tool for combating many pests, which is more aimed at the destruction of ticks and aphids. The drug is produced in the form of sticks, which are immersed in the soil near the stem of the plant.During irrigation, the active substances dissolve and begin to act, and therefore, insects can be effectively controlled in the early stages.

Advice!
The drug is intended for the care of indoor plants, but it has proven itself well in greenhouses, but again, only in the early stages.

The impact on the tick occurs after 2-3 days, the total period of plant protection is up to one and a half months.

Etisso. The drug, which is produced in the same form as Plant Pin, is also used as well. The main difference is the active substance. If in Plant Pin it is butoxyraboxime, then in Etisso it is dimethoate.

An immersed stick of this product dissolves with water during watering the plant, penetrates the aerial part and poisons insects that feed on the sap of the cultivated plant.

The result of the life of a spider mite colony in a greenhouse
The result of the life of a spider mite colony in a greenhouse

Be careful, the drugs are toxic. After use, be sure to discard the gloves in which you worked, and also wash your hands well with soap!

Actellic. An effective plant treatment product that must be used very carefully, with a gauze bandage and gloves.

The ampoule with the drug is carefully opened and poured into 1-1.5 liters of water (5 ml ampoule). The solution is mixed, and immediately ready for use. It is only necessary to pour it into the spray gun and treat the affected plants. Be sure to follow the instructions and take all precautions!

Fitoverm. An excellent drug, but, unfortunately, causes the so-called addiction in insects. That is, if you work with it incorrectly, then the tick simply adapts to the phytoverm and does not react to it in any way. But if you notice the affected plants on time, and process them for three weeks 3-4 times, using the product strictly according to the instructions, you can achieve a positive result.

In addition to these drugs, you can always find on sale and others - BI-58, Vermitek, Aktofit, Appolo, Flumayt. But note, some do not act on eggs and lactating females, and therefore may be less effective in a complex fight.

Parasite control problems

Trying to destroy pests in the country, in a greenhouse or on the open ground, you may encounter serious problems that will prevent a quality and effective fight:

  • Complex problem detection, although this is precisely what is most important for an effective “war”;
  • Rapid reproduction of the tick, the population of which grows much faster than many summer residents poison the pest;
  • The inefficiency of many drugs, as well as the high ability of insects to adapt;
  • The need for frequent treatments, since for 1-2 times the tick can not be killed, especially if the females have already laid thousands and thousands of eggs;
  • The need to completely destroy the population, otherwise you can get a huge number of insects adapted to the drugs used;
  • Web - a way to move insects, as well as excellent protection against moisture and solutions with effective drugs;
  • The need to use shock doses, and often, summer residents, beginners use the funds sparingly;
  • The need for a high concentration of drugs, which is dangerous for human and animal health, as well as infection of the fruits of cultivated plants.

The fight against the spider mite is very difficult, but this does not mean that every battle will be lost. Try to act correctly, do not spare the enemy and as carefully as possible beat off the remnants of the crop you love from insects.

What should I do if a spider mite appears on cucumbers?

Each gardener is faced with various insects. Many of them damage the foliage, and also negatively affect the quality and quantity of the crop. This is especially true for the spider mite, which is often found on cucumbers.

The insect envelops a thin cobweb of the plant, which disrupts photosynthesis. As a result, oxygen and the rays of the sun do not get to the shoots.To avoid unpleasant consequences, it is necessary to prepare in advance for pest control.

What do you need to know?

The body shape of this insect is slightly rounded. If you look at the pest under a microscope, you will notice many small bristles on its sides. Females outwardly differ significantly from males. They have a more rounded shape and larger sizes.

Attention!
The color of the insect may vary. It is influenced by several external factors, including ambient temperature. In most cases, pests of a greenish, yellow and brown shade are found.

Some varieties have dark spots on the sides. In winter, when ticks stop receiving food, the color changes to bright red or reddish.

The spider mite on cucumbers eats the juice contained in the leaves. These can be young shoots and adult crops. Insects are located on the lower part of the leaves and gradually envelop all the shoots with a translucent web.

With the onset of late autumn, the pest is looking for a place suitable for wintering. Some species move deep into the soil, while others go to the upper parts of the buildings.

Females of the insect lay eggs on the leaves of plants. During its short life, which is a maximum of 4 weeks, the pest lays at least 100 eggs.

The development of the insect is carried out in stages. These are the following stages:

  1. egg;
  2. larva;
  3. nymph;
  4. puberty.

At all these stages, except the first, the nutrition of young animals is leaf juice. Accordingly, even at an early stage of development, the spider mite on cucumbers is a significant danger.

The ripening period depends on temperature. So, at + 15º C, the egg phase lasts about 2 weeks. If the temperature exceeds + 30º C, then the phase is reduced. It is a maximum of 3 days.

Important!
If you do not deal with the spider mite, significant damage is possible. So, some plant cells begin to break down, due to which the intensity and area of ​​photosynthesis decreases.

As a result, the plant is significantly weakened and becomes susceptible to various diseases. It is worth noting that the spider mite belongs to the carriers of infection. For example, it can tolerate spores of gray rot.

Signs of Pest

In order to find the spider mite on cucumbers in time, it is necessary to regularly inspect the plants. The following factors indicate the appearance of an insect:

  • Numerous small dots located on the bottom of most leaves. With a significant lesion, large white spots appear on the foliage.
  • Translucent thin cobweb on leaves and stems.
  • Yellowed leaves on which there is no tick yet.
  • Slowing the growth of cucumbers.
  • With large-scale damage, the shoot is completely covered with a thin cobweb, and moving insects are noticeable on the ends of the leaves.

For humans, such a tick is completely safe, but for plants, especially for cucumbers, it poses a huge danger.

Methods of struggle

To get rid of the tick, it is necessary first of all to gently rinse the plant. Naturally, it is very inconvenient to wash spiky cucumbers, so you can replace the washing with spraying. All affected parts must be treated. Most often these are leaves.

Stems are also sometimes damaged. For spraying, warm water or a solution of laundry soap is best. Inexperienced gardeners use detergents.

This can not be done, because the composition may be harmful components.

  • Significantly damaged leaves must be carefully removed and burned. Due to this, it will be possible to reduce the reproduction of the pest and limit its migration to other leaves or plants.
  • Strongly affected shoots are recommended to be removed.
  • During cloudy weather, cucumbers should be abundantly watered and then covered with foil.
  • Due to this, the humidity level will increase significantly, which is very afraid of the spider mite.
  • In some cases, the use of chemicals is recommended.It can be a solution of Karbofos or Intavir. It is important to observe the dosage specified in the instructions.
  • A drug called Temik can be added to the soil. This is a powerful insecticide that will help destroy pests.
  • Spraying with phosphoric and sulfuric preparations is recommended.

Chemical attack

Experienced specialists claim that spraying with various insecticides in the presence of a spider mite is useless. In this case, it is better to give preference to acaricides or insectoacaricides.

Advice!
These funds cannot be called completely safe for human health, therefore, today various drugs with intestinal-contact action are actively used.

It is necessary to carry out processing with such compositions very carefully. This will require re-processing, which will destroy the younger generation. It is carried out depending on the temperature:

  • at + 20º C, plants are sprayed 3 times with an interval of 9 days;
  • at + 30º C it is necessary to spray 4 times with a break of 3-4 days.

If the air temperature rises significantly, then more treatments with a shorter interval will be required. Otherwise, such a procedure will be useless. This is because it takes literally 3-4 days to lay eggs.

You need to spray the plants in the evening, when the sun does not bake much. If you carry out the processing in the middle of the day, the toxic substances will evaporate quickly and will not have a harmful effect on pests.

Many experts recommend spraying cucumbers as a prophylaxis, since with a significant number of insects the recommended dose will be useless. If you increase it, then this can negatively affect human health.

It must be remembered that the prolonged use of one drug leads to the formation of immunity in the spider mite. It is also known that in one treatment no more than 50% of the pest dies. This is due to the fact that the web repels water, and therefore it is rather difficult to achieve a greater result.

Common chemicals against spider mites:

Plant pin. The tool is suitable for cucumbers that are grown in a greenhouse. It is enough to stick a special stick next to the shoot into the ground. When watering, this stick will begin to dissolve, releasing active substances. The drug is intended for an early stage of infection.

Attention!
Etisso. This remedy is similar to Plant Pin. Their difference is different active substances. The advantage of Etisso is the destruction of ticks from the root of the shoot.

Actellik. The drug effectively copes with the spider mite, but it is not safe for humans. Therefore, in the process of spraying, it is necessary to wear a respirator and gloves. 1 ampoule of the substance involves the use of 2 liters of water.

Fitoverm. This is a fairly effective drug, which must be periodically replaced with another remedy. Otherwise, the pest adapts to it and does not react in any way.

Actofit. Such a tool of biological origin is suitable for the destruction of various pests, including spider mites, cabbage whites, Colorado potato beetles, scoops. It can be used to protect various ornamental plants and crops.

If desired, you can replace the above chemicals with other means.

So, plant poisons are often used, which pose a minimal danger to humans. It is necessary to process plants with the help of such substances very carefully. In this case, it is necessary to adhere to the dosage indicated in the instructions.

Folk remedies

To avoid the appearance and active reproduction of spider mites, it is recommended to plant cucumbers along with various flowering plants. This is especially true for marigolds and calendula.

Experienced gardeners often use turpentine.It is necessary to pour the liquid into the container and put it without a cover near the diseased plant. Escape with a jar of turpentine covered with a thick cloth and leave at least 3-5 hours.

Specialists often prepare for spraying infusions of herbs:

  1. 200 g of a mixture of garlic and onion husks are diluted in 10 l of water;
  2. 400 g of crushed marigold flowers are mixed with 2 liters of water and infused for 5 days, before use, the infusion must be diluted with the same amount of water;
  3. 400 g of chopped dandelion leaves are placed in a container with 10 l of water and left for 2 hours;
  4. 300 g of sorrel roots are poured into 10 waters and left for 3 hours;
  5. dandelion leaves, onions and garlic are passed through a meat grinder, a glass of such pulp is mixed with a spoon of any liquid soap and diluted in 10 liters of water, after a couple of hours the composition needs to be filtered;
  6. 1 kg of dried yarrow is poured into 2 liters of boiling water and left for 40 minutes, then the liquid is poured into a container with 10 liters of water and insisted for 2 days.

In order to remove spider mite from the plant surface, cucumbers need to be washed with warm soapy solutions. For this purpose, it is necessary to use only laundry soap. Its foam can be left on the shoot. This treatment is good with a small amount of spider mites.

Important!
It must be remembered that the pest does not tolerate UV rays, so seedlings can be irradiated with an ultraviolet lamp. One session lasts literally 2 minutes.

The procedure is repeated once a week, due to which the number of insects is significantly reduced, and the resistance of cucumbers to most diseases increases. This treatment must be carried out very carefully so that the rays fall only on the lower surface of the leaves.

The spider mite is a serious pest, so it is worth using several different means to combat it. Even if at the end of processing the insects are not visible on the plants, it is necessary to carry out another prophylactic procedure in a week.

Precautionary measures

The spider mite poses a serious danger to cucumbers both in open ground and in greenhouses. It is difficult to immediately notice the pest, because it is very small. For this reason, attention must be paid to preventative treatment. This is very important, because the spider mite survives even at sub-zero temperatures.

If cucumbers are planted in a greenhouse, then it must be periodically disinfected. The place for planting seedlings in the garden must be changed every year. It is best to alternate areas where cucumbers and cereals are grown.

In addition, it is recommended to remove various weeds on time, because it is here that pests begin their reproduction.

General prevention includes:

  • Planting high-quality seeds that have been pretreated and have been decontaminated.
  • Seedlings need to be sown in warm soil. So, at a depth of 10 cm, the temperature of the soil should be at least + 12º C.
  • Only clear, loose soil is suitable for planting cucumbers.
  • It is recommended to choose varieties of cucumbers that are resistant to various diseases.
  • After the garden season, the remains of all plant crops must be removed. They should be burned.
  • If diseased plants are found in the garden, they must be destroyed.
  • Of particular importance is competent soil fertilization and disinfection.

It must be remembered that all of the above methods of combating spider mites do not always give a positive effect. In any case, you should regularly treat the plants, since in the open ground the possibility of re-infection of plants remains.

Thunderstorm crop plants

A spider mite is a “thunderstorm” of many cultivated plants. This pest is able to destroy the entire crop of both indoor and outdoor soil.

Fighting him is very difficult, but in order to begin to take active measures to destroy this enemy, the enemy should be "known in person."

Appearance

The size of the spider mite is very small.The female has a size of about 0.5 mm, the male is 0.3 mm. If the food is to his taste, then, eating well the juice of cucumber leaves, individual individuals can reach a size of 2 mm.

Advice!
The spider mite has an elongated, elliptical body shape. Females are orange-red in color, very prolific.

Each female can lay 8,000 eggs in one season. The period from an egg to a mature individual takes only a few days, and if this pest is not destroyed on time, the crop will be completely destroyed. Due to the very small size, the spider mite is very difficult to detect at the time of settlement on the site.

Signs of occurrence

Signs of damage to plants by the spider mite, at the initial stage, appear as small, white dots on the inside of the cucumber leaf. When the dots turn into large spots and the plant wraps itself in a white web, we can already speak of a serious damage to the plant, which threatens it with complete death.

If the cucumber bush is already starting to wither, all the leaves are yellow, and the plant is shrouded in cobwebs, then in this case the plant must be completely removed from the site. Such a radical method, in many cases, allows you to stop the spread of the pest in the area. This is done as follows:

  • The plant is carefully dug out along with the root.
  • The cucumber bush is placed in a plastic bag.
  • A plant bag is taken out of the site and burned.

After the affected plant is destroyed, the cucumber plantation is treated with drugs designed to destroy the spider mite. This is done to prevent further spread of the pest in the area.

When the tick just started its "black" business, at an early stage, you can save the affected plant.

If cucumbers are grown in protected ground, then by changing the temperature regime and relative humidity of the air, the reproduction of this pest can be significantly stopped, and with an integrated approach using acaricidal agents, preferably of plant origin, the enemy of cucumber beds can be completely destroyed.

The temperature is required to withstand at a level of + 30-32 degrees, and relative humidity in the range of 80-90%. Under these conditions, the spider mite larvae stop developing, and the use of chemical preparations completely kills them. You can use, time-tested, folk remedies to combat this pest.

Infusion of the Caucasian Hogweed, is capable of completely destroying both sexually mature individuals and tick larvae. Caution should be exercised when handling this grass, since the plant is poisonous and dangerous to humans.

Attention!
But if you follow the dosage, and apply personal protective equipment, then this is perhaps the only effective tool that is an alternative to the use of chemicals.

An infusion is prepared in the following sequence:

  1. In glass or enameled dishes, dried grass is infused for 24 hours in a ratio of 1 kg per 10 liters of water.
  2. The solution is filtered through cheesecloth.
  3. Plants are sprayed with the resulting infusion exclusively in the evening.

If processing occurs during the growing season, it is strictly forbidden to use vegetables for food after processing in this way.

How to fight

If this method of struggle has not yielded results, the “heavy artillery” of the chemical industry is used, among which are some of the most powerful drugs for combating spider mites.

Anti-tick - a drug for spider mites, is a very effective tool in combating spider mites. It can be used both in open ground and in greenhouse conditions. With a single application, the result is visible after a few hours.

Re-treatment with this drug, as a rule, is not performed due to the addiction of the tick to this drug.If re-treatment is required, then another drug is selected.

Appolo - inexpensive and effective contact action acaricide. Little dangerous to humans; not dangerous for bees and other beneficial insects. The drug destroys the insect at the stage of the larva, adults, are sterilized and die a natural death. Protective properties, even after a single treatment, are maintained for 2 months.

Fufanon - organophosphorus insecticide with a wide spectrum of action. Destroys pests of a garden and a kitchen garden, including a spider mite. Not phytotoxic, but dangerous for bees and fish. Therefore, if an apiary is located on your site, then this drug is not recommended.

Actellic - a very powerful drug, has a long protective effect and low resistance in the spider mite. Toxic to humans, bees and fish. The price of the drug is quite high.

Important!
Omight 57 - acaricide contact method of action. Used to kill a tick in a mature stage. It does not act on eggs laid by the female, but can destroy larvae emerging from the egg. Resistance to spider mites is practically absent.

All work on the processing of plants must be done in cloudy weather or in the evening. Be sure to use personal protective equipment, and wash your hands thoroughly after spraying the plants.

What to treat for prevention

Than to treat the disease, it is easier to prevent it. With the defeat of the cucumber by the spider mite, everything is the same way, and “disease” should be prevented with the help of preventive measures.

In order for cucumbers or other plants on the site not to become a victim of this voracious and numerous insect, it is necessary to weed the site on time from weed vegetation. For the winter, it is imperative to do a deep digging of the site, which contributes to the destruction of many pests in a frosty winter.

If cucumbers are planned to be grown in sheltered soil, then thermal or chemical treatment of wooden beams is necessary.

Attraction of natural enemies of the spider mite to the site gives a very good preventive effect. Phytoseyulyus - this tick is able to find and destroy the spider mite even at an early stage of plant damage.

Among the folk remedies for preventing the spread of ticks, we can recommend the use of ordinary dill on the beds.

Plants are planted around the perimeter of the cucumber plot. This plant protection system can be used both in open ground and in greenhouse conditions.

Advice!
If cucumber plants were treated with chemicals, then it is not recommended to eat dill, which was grown on the site.

Beautiful, and flowering plants of cucumber on your site may appeal not only to you, but to any creatures that can destroy the entire crop in a matter of hours. Therefore, daily monitoring of the site is necessary in order to identify the pest at an early stage of plant damage.

Spider mite control measures

Timely measures to combat spider mites allow you to get a guaranteed high yield of cucumbers and other vegetables that are affected by this pest. We offer you an overview of fixed assets, how to get rid of a spider mite on your personal plot.

Pest Description

How the spider mite looks in the photo, you can see on this page. These pests are with a piercing-sucking mouth apparatus. They damage over 190 species of cultivated and wild plants.

Spider mite
Spider mite

They are especially dangerous for a cucumber in a protected ground, in particular where basic requirements for observing the necessary cultivation regimes are violated. Populating the leaf from the bottom, they pierce the tissue and suck out the contents of the cells.

Light dots and spots appear on the upper side of the leaves, the leaves gradually acquire a brown hue, then they dry out, due to which the fruiting period of the plant is sharply reduced.

Under favorable conditions for the tick in greenhouses and greenhouses (increased air temperature at + 25–32 ° C, low relative humidity - 60%), the pest develops very quickly.

The tick can give up to 20 generations in winter greenhouses and up to 5 generations in open ground conditions. Fertilized female mites overwinter in plant debris, under lumps of soil, in greenhouse hives, in cracks and crevices of greenhouses, greenhouses, sheds and houses.

How to fight?

Protection of the cucumber from the pest begins immediately after harvesting: all plant debris is removed and destroyed; in the fall, greenhouses and greenhouses are disinfected with sulfur checkers, subject to the tightness of the structure; in the spring, before sowing seeds or transplanting seedlings, repeated disinfection is carried out - fumigation with sulfur (100 g / m3).

Before fighting the spider mite on cucumbers, conduct a soil treatment.

During the cultivation period, it is necessary to maintain a microclimate regime that is optimal for cucumbers (air temperature + 32 ° C, relative humidity above 80–85%), due to which the development of the tick is sharply inhibited, both the fertility of females and the percentage of birth of larvae from eggs are reduced.

Attention!
Before getting rid of the spider mite forever, remove the favorable conditions for its reproduction.

Gardeners should always remember that in one building of sheltered soil it is categorically not recommended to grow different crops, since their requirements for growing conditions can be completely different (for example, tomato needs dry air, and cucumber - high air humidity, etc. . P.).

Spider Mite Remedy

Choosing a spider mite remedy is not so simple. It is not recommended to use “chemistry” in household plots against ticks, but the use of a biomethod is advisable. For example, the spider mite well destroys the predatory tick phytoseyulyus, which is introduced into the foci of the pest.

Good results are also given by spraying plants with phytoverm - 0.2% ke. (3 ml per 10 l of water).

How to deal with a dangerous pest

The main pest that lives on cucumbers in the greenhouse is the spider mite. This arachnid can be milky-transparent, yellow-green, red or orange, no more than two millimeters in size.

A spider mite from the inside of the leaves settles. The first signs of his presence are brightening dots on the surface of the sheet. When the mite population increases, these arachnids form spider webs.

It is extremely difficult to deal with spider mites, because it multiplies very quickly, occurs on plants throughout the growing season, at all stages of development, and its colonies are located only on the underside of leaves, and are protected by a spider canopy.

It is necessary to alternate the planting of cucumbers with cabbage and tomatoes. Systematically remove weeds, since ticks that winter in the open ground first develop on them. It is preferable to grow a grass lawn between the greenhouses.

After the last harvest, it is necessary to conduct continuous processing of greenhouse plants with acaricides, so we will prevent the spread of spider mites. In order to reduce the wintering stock of ticks, it is necessary to remove old and weed plants from the greenhouse at the end of summer - early autumn, and then additionally spray the greenhouse structures.

Important!
In autumn, it is necessary to dig up the soil, clean the greenhouses and greenhouses from plant debris, disinfect the structures, fumigating them with sulfur at a concentration of 100 grams per cubic meter. Fumigation can be replaced by spraying with bleach diluted in a ratio of 1 kg of lime per 10 liters of water.

After the season, remove the topsoil.Sometimes trellises and pipes are burned with a gas burner. As cucumbers are grown in the greenhouse, there should be a constant high (above 80-85%) air humidity, and you should pay attention to the places near the transom where the humidity is lower due to more active air exchange.

It is necessary constantly, during all operations to care for plantings, to carefully examine the plants, and if single damage is found on the leaves, collect the affected organs of the cucumber and burn / bury.

Use biological products with an interval of 10 to 15 days if foci of spider mite are found. With mass pest occurrences, plants must be systematically sprayed repeatedly throughout the growing season with biological products after 5-10 days.

To do this, use such means as bitoxibacillin (80-100 grams per 10 liters of water), fitoverm (aktofit) (10 ml per 10 liters of water), colloidal sulfur (50-100 grams per 10 liters of water). Produce and dusting with ground sulfur in the ratio of 3 grams per square meter of plantings.

When detecting the first foci of the pest, use the natural enemies of the spider mite - this is, for example, a predatory mite, phytoseyulus. To do this, you need to decompose the leaves of the culture with accumulations of a predator (from 10 to 60 individuals per infected plant) into the foci of spread of the tick. If the spider mite is already firmly established in the greenhouse, the predator – prey ratio will be different, 1:20 - 1:50.

If the above methods did not help, you need to resort to chemicals. For the struggle to be successful, it is necessary to alternately alternate the use of acaricides with different mechanisms of toxic effects, since the spider mite is able to "get used" to one drug, quickly form a population resistant to acaricide.

If you liked the article, share it with your friends:

Be the first to comment

leave a comment

Your email address will not be published.


*