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Diseases and pests of indoor plants: causes and control measures

Of course, indoor plants are less likely to suffer from diseases and pests than their garden relatives, as they are usually under more scrutiny. But if home flowers yet they are damaged by insects or are infected, it is much more difficult to treat them, because “green pets” are more pampering and capricious, react worse to outside interference and, especially, to the use of chemicals.

Improper location (very dark, too sunny, too cold, very warm, with low air humidity) as well as improper care (too much water, lack of moisture, not fertilizer, inappropriate substrate) can cause poor plant condition. Unqualified care also contributes to the defeat of indoor plants with pests and diseases, the plants refuse to bloom, wither, and eventually perish.

Enemies, as they say, need to know in person. So, read the photos and names of diseases and pests of indoor plants, learn about the causes of damage and how to get rid of these insects and infections.

Diseases of indoor plants: photo, causes and methods of struggle

In this section of the article, you will learn how to deal with some diseases of houseplants and be able to see what the symptoms of a lesion look like.

Brown leaf edges

The reasons: excess or lack of water, excess fertilizer, soil lost its suitability, dry air.

Control measures: optimize care, increase air humidity.

Twisted leaves

The reasons: low air humidity, dry ground. Also the cause of this plant disease can be damage to the roots.

Control measures: optimize care, if necessary transplant.

Pale leaves (chlorosis)

In plants that prefer acidic soil, such as azalea and spurge. The veins of the leaves are still green.

The reasons: hard water, iron deficiency.

Control measures: soften the water, add iron to the water.

Light spots on the leaves

The reasons: temperature drops, too cold or too warm water. Moisturizing in the sun (for example, at a Saint-Barbados violet).

Control measures: change location, optimize care, water the bottom.

Mučnistaâ rosa

Symptoms: powder-like bloom from white to dirty brown on both sides of the leaves.

The reasons: fungus spores.

As seen in the photo, it is possible to fight this disease of indoor plants with the help of fungicides:

Control measures: for the prevention of spraying infusion horsetail. Sick leaves removed.

Gray mold

Symptoms: gray-brown bloom on leaves, petioles or flowers.

The reasons: not suitable for spraying or cold water, too high humidity.

Control measures: remove diseased parts of the plant, reduce the humidity of the air, put in a lighter place.

Bacteria and viruses

Bacterial wet rot is found in alpine violet and room calla.

Symptoms: rot at the base of the stem.

As shown in the photo, with this disease of indoor flowers, if there is no proper treatment, the rot spreads throughout the plant:

Control measures: No.

Mosaic virus

Striking above all Anthuriumorchids hydrangeas, gloxinia, hippeastrum.

Symptoms: light green and dark green spots.

Control measures: No.

Kidney dumping is most often caused by an imbalance. Either the plant experienced a lack of moisture, or as a result of excessive glaze the roots are so damaged that they cannot absorb and transport a sufficient amount of moisture. Some plants, such as gardenia, stephanotis or camellia, drop buds when the location changes dramatically. Premature dumping of flowers is also a consequence of changing the place of growth, and is especially evident when the plant is not sufficiently hardened. Inactive flowering may be due to genetic factors (some varieties bloom less than others) or lack of phosphorus, violation of the periods of dormancy, or improper wintering. Chapped pedicels are considered the result of irregular watering. This can lead to tension in the tissues and rupture of the shoots. Rotting flowers or buds indicate gray mold infection.

These photos show the symptoms of some diseases of indoor plants:

Pests of indoor plants: photos, causes and control measures

The most favorable time for pests of indoor plants is the end of the heating period. The lack of light and the dry air of the heated premises expose the plants to the danger of being attacked by pests. During this period, especially spider mites and aphids appear on plants. Summer and autumn are whitefly season. The best prevention will serve care that meets the needs of plants. Choose the most suitable locations. In addition, more time should be spent observing the plants.

First of all, pay attention to the underside of the leaves. It is often possible to detect the disease or pests in the initial stage of the lesion. Sick plants should be isolated to avoid spreading the infection to other specimens.

spider mites

Symptoms: cobweb under the leaves and in between.

The reasons: too dry air.

Control measures: increase the humidity of the air, use a warm shower, hook the predatory mites. Also, to combat these pests of indoor flowers are used special preparations.

Soft tongs

Symptoms: twisted leaves, cessation of growth.

The reasons: contamination, which contributes to heat and high humidity.

Control measures: reduce temperature and humidity. Parts of indoor plants affected by this pest must be removed and destroyed.


Symptoms: silvery touches on the leaves.

Look at the photo - if the pest is affected by this pest, brownish traces of sucking insects appear on the underside of the leaves:

The reasons: dry air.

Control measures: warm shower Insect traps, predatory mites, insecticides.


Symptoms: on the underside of the leaves are small white flies.

The reasons: infection from other plants.

Control measures: lower the temperature because the tropical insect does not tolerate coolness. Traps, horsemen and insecticides are also used to combat this pest of indoor plants.


Symptoms: sticky leaves, leaf deformation.

The reasons: draft, open windows in spring, too dry air.

Control measures: warm shower, gold eyes, predatory gall midges, horsemen, insecticides.


Symptoms: brown shields under which insects sit.

Pay attention to the photo - indoor plants affected by these pests shed their leaves:

The reasons: too dry and warm air.

Pest control measures: put indoor plants in a cooler and brighter place. Guards remove. To get rid of these pests of indoor plants as quickly as possible, you need to use insecticides. For hard leaf home crops, white mineral oil or spray is used to gloss the leaves.

Felt and mealybugs

Symptoms: formations similar to cotton, primarily in the sinuses and on the underside of the leaves. Poor growth.

The reasons: too dry air.

Control measures with these insect pests of houseplants are the same as in the fight against shields.


Symptoms: glass or brown spots bounded by leaf veins. Dumping leaves.

The reasons: infection, which contributes to moisture on the leaves.

Control measures: remove diseased leaves and destroy. Leaves keep dry.

Here you can see photos of the main diseases and pests of indoor plants:

Changes to plant leaves indicate the presence of pests, diseases, or care errors. A healthy leaf is strong, with flawless edges and a tip. Pay attention to the metamorphosis and take action. The leaves are the vital nerve of the plant and with it the best indicator of the presence of pests and diseases.

Sometimes buds and flowers are also damaged. The root causes of such damage should be known. Pale colors of flowers indicate an excess of sunlight. Deformed or torn flowers signal the presence of pests, such as aphids.

How to get rid of pests of indoor plants: flower protection methods

There are several ways to deal with pests of indoor plants. One of the most effective are mechanical protection, biotechnical methods and the use of chemicals.

How to get rid of pests on indoor plants, using mechanical protection:

  • To remove the affected parts of the plant.
  • To remove pests, including washing them in the shower.
  • Immerse the aerial parts of the affected plant in warm water with a small amount of detergent. Pot must first be put in a plastic bag and tie it on top.

Biological methods of control consist in the use of beneficial insects, for example:

  • Riders against whitefly,
  • Predatory mites against spider mites and fringed-winged,
  • Predatory gall midges, gold-eyed or riders against aphids.

Beneficial insects are the most effective means when a large number of plants are affected, and the air is not too warm and dry. The ideal temperature is considered to be about 20 ° С and at 27 ° С and above, success is questionable.

Biotechnological methods of struggle use natural pest reactions to physical or chemical irritations:

  • Yellow plates are insect traps covered with glue, which attract with their bright color mining flies, whiteflies, sciarides and other flying pests.
  • In the “plant bath”, due to the very high humidity of the air, spider mites are destroyed. For this you need to water the plant well and place it in a transparent plastic bag. Carefully rot! Plants with soft leaves do not tolerate such treatment.
  • Oily substances, such as white oil, clog the insects' airways. Similarly, there are sprays for leaf gloss.

Do not immediately take toxic chemicals. In many cases, the same effect can be obtained using completely harmless means.

Chemicals should be used only as a last resort. If you have to use chemicals, then be sure to follow the following rules:

  • Follow the directions for use and dosage contained on the package.
  • Follow the recommended treatment intervals to eliminate new generations of pests.
  • Do not use environmentally friendly sprays.
  • Work the plants outdoors only.
  • Use gloves and do not inhale spray.
  • Keep plant protection products in unopened original packaging out of the reach of children and pets.
  • Do not store the remnants of chemicals, their effectiveness is quickly lost. Do not dispose of chemicals with normal household waste, but send them to collection points for special waste.

These photos show how to deal with pests of indoor plants using various methods:

Prevention to protect indoor plants from diseases and pests

Improper care and mistakes when choosing a location can greatly weaken the plants. In such cases, flowers easily become victims of diseases and pests. Therefore, the best protection of indoor plants from pests and diseases is prevention and the correct choice of location.

If it was not possible to avoid disease or pests, then rapid diagnosis and targeted treatment will help.

Proper care is considered guaranteed. disease protection and pests.

How to carry out prevention to protect indoor plants from diseases and pests:

  • It is especially important to increase the humidity of the air during the heating season. Dry air is the main cause of pests.
  • Avoid excessive plant density.
  • Regularly prune dried leaves and flowers and keep pots and soil clean.
  • Plant tissues can be strengthened by proper dosage of fertilizers and with the help of special means, such as horsetail mixtures containing silicic acid or aromatic sprays.

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