Thrips on indoor plants: photos, preparations, how to deal with orchids and cucumbers


Plant pests

Thrips (Latin Thysanoptera), or bubbly (fringe-winged, kolboptera) - a detachment of small-sized insects, common on all continents. Thrips were first described in 1744 by Karl de Geer, and today more than 6,000 species of these insects have been identified, united in more than a hundred genera.

Pest thrips - description

In length, the black, brown or gray body of thrips reaches from 0.5 to 3 mm, some species are much larger - about 14 mm. The legs of thrips are running, the oral apparatus is asymmetric, piercing-sucking, and the legs are without claws, but equipped with teeth and a bubble-shaped suction device. The abdomen of thrips consists of 11 segments. There is a fringe along the edges of the wings. The development of thrips goes through five stages: eggs, larvae, pronymphs, nymphs and adults. In thrips larvae, the body is grayish or white-yellow, otherwise they differ from the imago only in the absence of wings.

Thrips are polyphages, that is, omnivorous insects. They are among the most common pests of agricultural, vegetable, fruit, ornamental and indoor crops. They pose a particular danger to plants in enclosed spaces: if thrips are bred in greenhouses, it is very difficult to get rid of them, you can only restrain their population. It is difficult to detect these pests due to their small size and secretive lifestyle: they can parasitize for a long time on one plant, without spreading to neighboring ones.

Adults and larvae suck the sap from the ground parts of the plant and infect them with their secretions. First, discolored or yellowish spots, streaks or streaks appear on the bite sites, which gradually merge. As a result of the activity of pests, the plant tissue dies off, holes form at the site of the spots, the leaves wither and fall off, the flowers lose their decorative effect and crumble ahead of time. During the mass occupation of the plant by thrips, silvery areas appear on its ground organs, the stems are bent, and the flowers are deformed due to the fact that the flower buds were damaged by pests. On top of that, thrips are carriers of incurable viral diseases.

Thrips - preventive treatment

To prevent thrips from settling on your indoor flowers, take preventive measures:

  • monitor the level of humidity in the room: thrips, like spider mites, like a dry environment, so humidify the air with a fine spray or an electric device;
  • regularly inspect the plants, especially the underside of the leaves, and if larvae or adult pests are found, immediately shower the flowers;
  • make it a rule to wash indoor plants at least once a month to clean them of dust, pest larvae and adult parasites;
  • Spread out and hang glue traps between the plants - fly strips or blue or yellow strips of paper with adhesive applied to them. The bait will help you identify the pest and reduce its number;
  • Quarantine purchased or donated plants: keep them away from your flowers for at least 2-3 weeks and observe their condition.

How to deal with thrips on indoor plants

Orchid thrips

The fact that thrips have settled on the orchid will be prompted by the appearance of a silvery film on its leaves and small strokes and dots on the underside of the leaf plate. These lesions are similar to those that spider mites leave on plants, but the marks from thrips bites are more pronounced. Since thrips hide in the substrate at the slightest danger, they can be very difficult to detect. In addition, they easily move from one plant to another with the help of wings. How to get rid of thrips? First, you need to thoroughly wash the orchid in the shower, then cut out all damaged areas to healthy tissue, sprinkle the cuts with crushed coal and spray the flower with Fitoverm or Aktellik. The insecticide treatment is repeated twice more with an interval of 10 days. All this time, the plant should be in quarantine until you are sure that you have destroyed all the pests. If there are few thrips on the orchid, instead of chemical preparations, plant insecticides can be used for treatment - an infusion of onions or garlic or oil water.

Violet thrips

As with other flowers, flower thrips on Saintpaulias usually show themselves when most of the plants are already affected. And yet, there is a way to deal with pests on violets literally in one go. Water your Saintpaulias well 2-3 days before processing. Before processing, wrap the pot with a plastic bag to protect the soil from water ingress. Wash off the dust from the violet with warm running water, then lower the flower “upside down” into a deep basin with the following composition: 1 ampoule of Fitoverm and 25-30 ml of anti-flea shampoo for animals are dissolved in 5-6 liters of warm water. When stirring, the shampoo forms a foam that must be removed, to the extent that the remains of soap scraps are absorbed with toilet paper. The violet should be in a soapy solution for 10 seconds, after which it is taken out of the water and turned over very slowly so that as much liquid as possible is in the basin. It is absolutely forbidden to shake and twirl the flower, trying to shake off the water from it. Remove the polyethylene from the pot and thoroughly pour the soil with a solution of Aktara and Fitosporin-M, prepared in accordance with the instructions. Quarantine the processed flowers until you are sure that there are no more thrips on them.

Control measures for thrips in the garden

Fighting thrips on cucumbers

Most often, thrips on cucumbers can be found in the greenhouse. They settle on the underside of young leaves and feed on their sap, which slows down the growth and development of the entire plant. In places of punctures, light circles are formed, and they are located so densely that they are found upon close examination. In addition to bites, silvery areas appear on the leaves - evidence that air has entered the leaf.

Thrips multiply very quickly, so the fight against them must be started immediately. If there are few pests, then you can treat cucumbers with infusions of garlic, onions or celandine, but if the moment is missed and thrips have settled throughout the greenhouse, they resort to using drugs such as Aktara, Avertin N or Imidacloprid, from which an aqueous solution is prepared in accordance with the instructions ... Do not forget to protect yourself with rubber gloves, goggles and a respirator when processing, and tune in to the fact that you will need several such treatments to completely defeat thrips.

Onion trips

Tobacco onion thrips affects the main parts of the plant - the feather and the bulb, but it is often difficult to immediately figure out which insect is damaging the onion. If you find small black dots on the plant, and light, mercury-like spots in the leaf axils, you are probably dealing with thrips. In the future, onion leaves turn yellow, starting from the top, and die off. The plant slows down development and forms small bulbs. Of the onion crops, garlic is less susceptible to infection with thrips than others; shallots are also quite resistant to this pest. Thrips are most dangerous for onions.

You can protect the planting of onions from thrips by organizing the correct crop rotation, that is, re-planting onions or garlic on the site no earlier than 4-5 years later, and after harvesting, collecting and burning all plant residues. Do not forget about the obligatory digging of the earth in the fall: the pest hibernates at a depth of 7 cm. After collecting the onions in the greenhouse, do not forget to treat it with a solution of Karbofos. Remove weeds in a timely manner and sow only decontaminated material.

If thrips are found, it is necessary to fumigate the room where the onions and sets are stored with sulfur gas: 1 kg of sulfur is enough to treat 1 m³ of the storage. The fight against thrips in the onion bed is carried out by Aktellik, Aktara, Mospilan, Fufanon, Fitoverm, Iskra Zolotoy, Karate or Vertimek. Recently, the Spintor insecticide has gained popularity, with which onions are treated every one and a half weeks. In addition to insecticides, sticky traps can be used, and if there are few thrips on the onion, then an infusion of onions, tobacco, celandine or a decoction of zest is used to destroy them.

Gladioli trips

Gladiolus thrips are a real disaster for these majestic flowers. It multiplies more intensively in hot dry weather and can give up to seven generations in one season. Thrips cause serious damage to blossoming inflorescences: climbing into the buds, adults and larvae make punctures in delicate petals, and after rain they turn brown, as if burnt. Severely damaged buds do not open and dry out. But not only gladiolus flowers suffer from thrips: the replacement bulb of the affected plant is formed so small and weakened that it dies during storage. With the onset of autumn, thrips make their way deep into the soil and settle on the bottom of gladiolus corms, and after harvesting, you bring pests to the storage.

How to protect gladioli from infection with thrips? Every autumn, collect and burn or compost all plant residues, dig up the ground, and before storing the dug corms, sort out and discard all specimens with mechanical damage, punctures and gnaws, lower healthy corms for half an hour in a solution of Karbofos, and then rinse them in clean water, dry it and only then store it at a temperature not exceeding 5 ºC: in such conditions, the thrips dies. Before spring planting, gladiolus corms need to be etched again in a solution of Karbofos.

From mid-June, carry out a cycle of insecticide treatments for gladioli, alternating preparations. For example, you can spray the flowers with Karbofos or Aktellik twice, then treat them with Decis. The first two treatments are carried out with an interval of 7-12 days, and the subsequent ones - 25-28 days after the second.

Thrips on roses

On garden roses, thrips settle mainly in the buds and feed on their juice, as a result of which the affected flowers do not open and dry out very quickly. Since thrips reproduce and spread very quickly throughout the plant, you can lose all roses if you do not decisively start fighting the pest. On both home and garden roses, drugs such as Fitoverm, Aktara, Commander and Inta-vir are used against thrips. With solutions of these insecticides, the roots of roses are shed once every two weeks, and experienced gardeners recommend adding a little zoo shampoo or grated green soap to the soil solution. Bushes are not treated with insecticides, as this can kill the bees. Affected buds need to be cut off: it will still not be possible to save them, but you can protect healthy flowers from pest infestation.

Thrips remedies (drugs)

In order to surely get rid of thrips, you will have to resort to treating plants with chemicals. Which ones are the most effective? And which ones are least harmful to humans? We offer you a brief description of the insecticidal preparations on sale.

  • Agravertin is a biological preparation of intestinal action that is highly effective in the fight against sucking insects. Consumption - 5 ml per half liter of water;
  • Aktara is a highly effective enteric-contact insecticide that is quickly absorbed by the plant;
  • Actellic is an organophosphate insecticide of a wide spectrum of action - contact-intestinal - against leaf-gnawing, sucking pests and ticks. Consumption - 1 ampoule per 1 liter of water;
  • Vertimek is an enteric acaricide insectoacaricide for protecting plants in greenhouses, as well as indoor plants. Consumption - 2.5 ml per 10 liters of water;
  • Decis is a broad-spectrum contact insecticide against leaf-eating and sucking pests, destroying both adults and larvae;
  • Imidacloprid is a chemical insecticide used in the fight against harmful insects. Imidacloprid is used as an active ingredient in many modern drugs;
  • Inta-vir is a drug for the extermination of insects in vegetable gardens, gardens and greenhouses, safe for pets and people. Consumption - 1 tablet for 2 liters of water;
  • Spark gold - a highly effective insecticidal agent against insect pests;
  • Karate is a contact action insecticide with high efficiency in pest control. Consumption - 0.5 ml per 2.5 liters of water;
  • Karbofos is a moderately toxic pesticide against pests of fruits and berries, citrus fruits, vegetables and grapes. Consumption - 15 g per 2 liters of water;
  • Mospilan is a fast-acting systemic insecticide that destroys pests at all stages of development;
  • Spintor is a preparation of biological origin with a unique mechanism of action against a huge number of pests;
  • Fitoverm is a biological product that is a waste product of soil microorganisms and protects indoor plants from pests. Consumption - 2 ml per 200 ml of water;
  • Fufanon is a broad-spectrum organophosphate insecticide with contact, intestinal and fumigate action.

Fighting thrips with folk remedies

While grandma's decoctions and infusions are not as effective as the latest chemicals, they are significantly less toxic to humans, bees, birds, and pets. Therefore, in the case of a small number of pests or for prevention purposes, it makes sense not to shoot the sparrows with a cannon, but to treat the plants with such folk remedies:

  • Pour 1 teaspoon of chopped garlic or onion with a glass of water and let it brew for a day, then strain and process indoor plants;
  • pour half a liter jar of dry marigolds with water to the top of the jar, leave for 2 days, strain and spray the plants;
  • Pour 50 g of fresh dandelion leaves or roots with a liter of warm water and leave for three hours, then strain and use to spray the affected plants;
  • Pour 100 g of pharmacy chamomile with 1 liter of water, let it brew for half a day, strain, add 5 g of grated green soap to the infusion and treat the plants affected by thrips;
  • half a glass of dry crushed tobacco or tobacco dust is poured into 1 liter of water, infused for a day, filtered, added to the composition of another 1 liter of water, stirred and used to treat plants from thrips;
  • Pour 50 g of dry tomato leaves with a glass of water, leave for 3 hours, strain and add infusion with water to a volume of 1 liter. Use for spraying plants;
  • 50 g of fresh crushed leaves and stems or 100 g of dry celandine pour 1 liter of water, leave for a day, strain and process the plants from thrips;
  • place turpentine or chopped garlic in a small container, place it directly in a pot next to a houseplant infected with thrips and then cover the flower for 3 hours with a plastic bag.

Types of thrips

As we already wrote, there are a huge number of thrips in nature, and many of them are omnivorous. But more often than others in indoor conditions, greenhouses and in the open field, there are such types:

  • common thrips (lat.Frankliniella intonsa) - a dark brown beetle 1.2 mm long, which is a wide polyphagous parasite on many cultivated plants and feeds on the sap of ovaries and flowers. Damages decorative, berry, fruit and vegetable crops. Found throughout the Palaearctic;
  • floral western thrips, he is California thrips (Latin Frankliniella occidentallis) - also a wide polyphage, affecting various cultures both in open and in closed ground;
  • decorative thrips (lat.Hercinothrips femoralis) - a dark brown insect up to 1.7 mm long, damaging almost all ornamental plants: chrysanthemums, orchids, crotons, gardenias, begonias, cacti, coleus, calla lilies, palms, dracaena, as well as bulbous and commeline crops. In the middle lane and areas with a cooler climate, this species lives mainly in closed ground;
  • dracaena thrips (lat.Parthenothrips dracaenae) - females of this species are yellow-brown, up to 1.2 mm long, males are slightly smaller and lighter in color. Dracene thrips damage aroid and commeline crops, aralia, hibiscus, ficus and other plants. In natural conditions, they live in the tropics and subtropics, and in regions with cooler climates, they infect plants in rooms and greenhouses;
  • rose thrips (Latin Thrips fuscipennis) - a wide polyphage, reaching a length of 1 mm. His body is brown, this species lives mainly on rosaceous crops in closed and open ground, settling in flowers and buds;
  • tobacco thrips (Latin Thrips tabaci) is a dangerous pest of many cultivated plants, preferring nightshade and umbrella crops. The color of the female can vary from light yellow to brown; tobacco thrips reach 1 mm in length. Under natural conditions, they are found in the south of Russia, in Ukraine and Central Asia, and in the north they prefer to harm plants in greenhouses and greenhouses;
  • bulbous thrips (lat.Liothrips vaneeckei) has a dark brown body up to 2 mm long and settles between the scales of the bulbs. Widespread;
  • wheat thrips It can eat both cultivated and ornamental plants, but its favorites are representatives of the Cereals family: oats, rye, corn, barley, as well as plants such as cotton, buckwheat and tobacco. Wheat thrips do not disdain even weeds. Wheat thrips is a dark beetle, its female reaches 2.5 cm in length, and the male is half as long.

You should know that scientists have discovered elements of social behavior in thrips: they, like bees or ants, gather in numerous groups in order to protect the clutch and larvae and pave odorous paths for group coordination.

Literature

  1. Read the topic on Wikipedia
  2. Plant Pest Information

Sections: Pests Houseplant pests


Spider mite on indoor plants: how to fight, where it comes from, control measures and prevention

The spider mite is one of the most common parasites that affects not only garden crops, but also indoor plants. Is an insect dangerous for a green culture? Certainly! Therefore, in our article you will find detailed information on how to deal with spider mites on indoor plants with the help of modern drugs and proven folk remedies. In addition, you will also find out where this parasite comes from on flowers, which will prevent its occurrence in the future.


Orchid - flower description

A feature of a flower is the way it grows, the structure of the plant. Orchis translated from Greek means testicle, because the roots of the plant are like a paired onion. Epiphytic orchids need support during growth. Therefore, in nature, they find it, relying on tree trunks. The aerial roots of a plant receive nourishment not from the earth, but from sunlight, air, from the bark of the plants on which they live. The roots, together with the leaves, are involved in the process of photosynthesis.

There are types of orchids that have settled on rocks and stones. All types of flowers also have rhizomes or tubers underground. The stem of the plant can be of different lengths, grow straight up or crawl. There are few leaves on it.

The main value of the orchid is in the shape and unusual color of the flower.

More often, the inflorescences resemble a shoe, a slipper. They are located one by one on a spikelet or in a group on a brush. Attracting with a wonderful smell and bright variegated colors of bees, wasps, the plant provides pollination of its flowers.

The Phalaenopsis orchid genus, which is actively cultivated at home, is especially common among flower growers. Shades of color in this type of orchid are many from black, blue, purple to white, pink, yellow. A bright beautiful flower looks attractive if it is healthy and nothing interferes with its full development.


Control methods

If the western flower thrips, tobacco thrips and other species of these insects have already settled on the leaves and flowers of plants, they are used to combat them:

Traditional methods

Various herbal infusions (effective if there are few thrips):

Dandelions

  • From crushed garlic. A teaspoon per glass of hot water is infused for a day.
  • From tomato leaves. Pour crushed dry leaves (40 grams) with water, leave for 3 hours, strain and add water to a liter.

Tomato leaves

From celandine. Pour 400 grams of fresh celandine with a liter of water and leave for a day and a half.

From orange peel (150 g), red pepper (10 g), yarrow (80 g), garlic (1 clove) or ash. Grind everything, pour boiling water, boil for 15 minutes, let cool, strain and rinse the bulbs and plant roots in it.

  • A solution based on any dishwashing detergent. For a liter of water, half a teaspoon of liquid and 2 tbsp. spoons of vodka.
  • Mustard. 1 tsp mustard powder per liter of water. This solution is poured over the soil where the pupae of the insects are.

Mustard powder

From liquid soap. 15 g of soap per liter of water. Plants are sprayed with a solution and covered with polyethylene for 3-4 hours. After processing, the leaves must be rinsed.

Steam baths (if the plant cannot be sprayed):

With garlic or turpentine. Chop / crush the garlic and pour a little turpentine into the jar, place it next to the object to be treated and cover the plant with polyethylene. Remove everything in three to four hours.

Processing plants using folk methods cannot be one-time. Spray often if you want to get rid of new thrips larvae.

Simple ways to get rid of moles in the country A funny mole from a cartoon or a businesslike one from a fairy tale about Thumbelina in reality turns out to be not so at all ...

Biological preparations

Prepare a solution for spraying on the basis of "Fitoverm" at the rate of 10 ml per liter of water. We spray it once every three weeks. If a separate small plant is affected by flower thrips, treat it with the preparation and cover with polyethylene, i.e. make a steam bath.

Chemicals

(In the fight against thrips, follow the instructions for use).

Ditox, Iskra-M, Fufanon, Novaktion, Iskra Zolotaya, Karbofos-500, Aktellik and others.

"Accord", "Alfatsin", "Caesar", "Tsunami", "Faskord", "Kinmiks", "Tarzan", "Vega", "Fitosan", "Sharpei", "Alatar", the drug "Engio" is very effective ...

"Altyn", "Gladiator", "Karachar", "Kungfu", "Samum", "Borey" and others.

Plants must be treated with chemicals at least twice, with an interval of 7-10 days.

So that neither California thrips, nor tobacco thrips, nor any other flower thrips infect your plants, inspect them more often, do not neglect preventive procedures, and carry out the necessary treatment on time and regularly.


How to get rid of Thrips with folk remedies

Folk remedies are used most often for prevention or when a pest has just appeared on plants. They are very helpful in the early stages.

  • Onion or garlic infusion... A teaspoon of chopped garlic or onion is poured into a glass of water and insisted for a day. When the infusion is ready, it is filtered and used to spray the plants. This product is best suited for indoor plants (for orchids, violets and the like), but it can also be used for garden crops.
  • Infusion of celandine... 50 g of fresh celandine or 100 g of dried celandine, mix with a liter of warm water. For a day, the remedy should be infused. You can cover it with a cloth so that midges and dust do not get inside. The finished product is filtered and sprayed over the plants. The infusion of tomato tops is prepared in the same way. Only you need to insist it not for a day, but only for 3 hours.
  • Infusion of marigolds... A half-liter jar is filled with dry marigolds. Then you need to pour water into it so that the jar is full. After 2 days, the infusion will be ready, you can strain it and use it to spray the plants.

Infusion of tobacco dust is filtered and used to treat crops affected by thrips

The main advantage of folk remedies over any insecticides is safety. They do not harm plants, people, animals, the environment, so they can be used safely. Bees and other pollinators do not suffer from them either. They can only be scared off by the smell of folk remedies, but no more.


Whitefly

This is an insect with a body length of no more than 2 mm. A characteristic feature is white wings and a yellowish body. They can be found:

  • On the back of the leaves, where they are located in colonies.
  • Following the characteristic sweetish traces, on which a sooty fungus appears after a while.

Whitefly larvae have a sucking mouth apparatus, so they suck the juices out of the plant. As a result, the plant loses its vitality, gradually loses its attractiveness. If you do not take any measures, then the plant will soon die.

Interesting fact! Appearing in greenhouses, the whitefly prefers plants such as hibiscus, pelargonium or begonia. After the appearance of only one individual, after a short period of time, a whole colony of these insatiable pests appears in the greenhouse. In this regard, the fight should be started immediately.

These are also harmful insects that suck the juices from plants, thanks to the presence of a piercing-sucking mouth apparatus. Insects are distinguished by an ovoid body shape, no more than 2 mm long. Aphids have rather long legs, but at the same time they move rather slowly. The color of insects depends on the species, as well as on the living conditions, therefore it can be varied.

There are both winged insect species and wingless ones. Naturally, insects with wings can easily enter a person's home, even through an open window.


White podura

White puffs are jumping insects that can be found in pots of indoor plants. They differ:

  • An elongated body on which sparse hairs grow.
  • The presence of 3 pairs of legs.
  • The presence of a long mustache.
  • Conditions with a humid environment are preferred.

The diet of these pests includes the remains of plant components, as well as a living root system. If you do not pay attention to these parasites in time and do not destroy them, then they can lead to the death of indoor plants.


Thrips control measures

Maintain a constant high humidity. This is an ideal prevention and protection against thrips at any time of the year.

In indoor conditions, if possible, it is better to isolate plants affected by thrips from healthy ones. Move the plants very carefully: with a little shaking, the larvae and adults easily fall from the flowers and leaves and can wait a long time for the moment to re-settle on the plants.

The place where the plants affected by thrips stood should be washed well. In affected plants in flower pots, it is also advisable to remove the topmost layer of soil, since there may be thrips larvae.

At the time of processing, it is highly desirable to remove all peduncles and affected leaves on the plants. It will take three to four treatments at intervals of 7-10 days.

When treating houseplants for thrips, you can use a large plastic bag. Place the pot with the plant in it, sprinkle and close the bag tightly for 2-3 hours. This method is also good for combating spider mites.

The only way to get rid of thrips is to carry out a series of treatments with systemic insecticides, for example, phytoverm, actellik (the safest for use at home). In greenhouses, greenhouses or in open ground, you can use vertimek, agravertin, spark, mospilan, aktara, and solutions of these drugs can be used not only for spraying, but also for root watering. A combination of higher concentrations with a slight addition of a flea shampoo is quite effective.

In the fight against thrips, a new drug, spinor, which is an insecticide of natural origin, has proven itself highly. Spraying with a spinor is carried out strictly according to the instructions with an interval of 7-10 days.


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