How to deal with a scale insect on an orchid: the most effective ways to treat a flower

How to deal with a scale insect on an orchid: the most effective ways to treat a flower

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Shield and false shield are insects that are dangerous to any plant. They can provoke illness, and sometimes the death of a green pet.

The appearance of yellow-brown plaques indicates infection with these insects. Orchids are on the list of favorite pest treats.

The article describes how to deal with the scale insect on an orchid, and also discusses preventive measures and useful recommendations.

Definition: what is this parasite?

The scale insect (family Diaspididae) and the false scale insect (family Coccidae) are representatives of the order of homoptera of the suborder Coccidae. Insects feed on plant sap (domestic, garden and forest) of:

  • leaves;
  • shoots;
  • fruits;
  • branches;
  • trunks.

Depending on the species, the body is round and elongated. The color ranges from light to dark brown. Sometimes a purple tint is found. The body of the scale insect is covered with a wax shell, which is a protection for the future generation.

False shields differ in that they do not have a shell, and the larvae and eggs are protected by the dying skin of the female. The size of the scale of adult insects does not exceed 5 mm, and the size of the false scale is 7 mm.

Insect larvae are called vagrants. When they leave the eggs, they spread throughout the plant. Juveniles are oval, light yellow in color and very mobile. They have eyes, three pairs of legs, and antennae.

Strollers attach themselves to leaves and stems. The limbs gradually die off. Insects are covered with a dense wax shell. The color of the carapace changes from white to brown. The larvae molt twice and turn into adult females and males.

Males become mobile. They grow legs and wings, but the oral apparatus is atrophied. After fertilization, they die. Depending on the type, females lay eggs under the scutellum or give birth to larvae (up to 1000 pieces). Then they die.


Entomologists studied about 2,400 species of scale insects and 1200 false scale insects. Differ from each other:

  • habitat;
  • size;
  • color.

Varieties: description and photo

Scabbards most of all like orchids with elastic smooth leaves, since it is easier to gain a foothold on them. The types of scale insects most common on orchids are:

NameFeatures of femalesFeatures of males
  • The body is ovoid.
  • The color is yellow-brown.
  • The carapace is rounded and convex.
  • The body is ovoid.
  • The color is yellow-brown.
  • The shell is oblong.
Orchid comma-shaped
  • The body is elongated. Narrow front and wider back.
  • The carapace follows the shape of the body.
  • The body is elongated. Narrow front and wider back.
  • The carapace is elongated and elongated.
CactusPale yellow in color.Orange color.
OleanderRounded ovate scutellum, yellowish.Elongated shape of the shield, covered with red spots.
  • Light brown and whitish yellow.
  • The body is oval.
  • The shield is round.
  • Light brown and whitish yellow.
  • The body is oval.
  • Elongated flap.
  • Cream.
  • Pear-shaped.
  • The scutellum is rounded.
  • Cream.
  • Pear-shaped.
  • The scutellum is elongated.
Hemispherical false shield
  • The scutellum is flat-convex, smooth, up to 4 mm long.
  • Color from dark brown to black.
Soft false shield
  • The body is asymmetrical, elliptical.
  • Yellow-brown color with a distinct vein in the middle.
  • The scutellum is elliptical, flat.


Orchid comma-shaped:





Hemispherical false shield:

Soft false shield:

What parts of the plant can it hit?

The parasite loves specimens with hard, smooth leaves, since it is easier to attach to them... First, the scabbard attaches to the back of the leaf, pierces the leaf, and begins to suck out the juice. Later, the pest moves over the stems and into the inflorescence zone, the root area of ​​the plants.

What is the danger of the insect?

  1. Sticky insect excrement leads to the development of a sooty fungus.
  2. Sweet honeydew disrupts the processes of photosynthesis, stops flowering.
  3. The false shield not only sticks to the plant, but also injects poison into the orchid, under the influence of which the leaves gradually die off.
  4. The death of a flower in the absence of pest control.

How to determine its appearance?

To see a pest at the beginning of its development is a difficult task. (due to its small size - 0.3 mm long).

  1. The first symptoms of scale insect infestation are sticky orchid leaves. This is a sticky pad that clogs the pores and prevents the plant from breathing. The insect secretes it in the process of life.
  2. Then small yellow-brown tubercles appear, which are located on leaf plates, young shoots and orchid flowers. Gradually, the number of such yellow spots increases.

Timely measures taken to destroy the pest will help save the orchid.

How to deal with insects and cure a flower?

First, it is necessary to carry out mechanical processing. Orchid processing stages:

  1. Thoroughly wash the window and sill with disinfectants.
  2. To catch active insects, use sticky tapes, which are placed near the flower.
  3. Leaves and shoots with an infestation rate of more than 50% - cut off.
  4. Replace topsoil.
  5. Rinse the leaves and peduncles with warm water using a soft soapy brush (to remove the sticky honeydew).
  6. Dry the plant for 1-1.5 days.
  7. Carry out processing using means: folk, biological or chemical (depending on the degree of infection).

The treatment is repeated after 7-10 days.

Folk recipes

At the initial stage of infection, folk remedies are used:

GarlicFinely chop and apply to the insect attachment point, or rub it with half a wedge.
Garlic and soap
  1. Garlic - through the garlic press.
  2. Soap - finely grated.
  3. Dilute with water (ratio 1: 1: 3).
BowRub the pest or pour water over the finely chopped onion and then pay for the plant.
AlcoholThey are processed pointwise. But be careful, as it can burn the leaf.
Vegetable oilTwo tablespoons per liter of water.

Biological agents

If folk remedies did not help, treatment with biological or chemical agents can be carried out.

A drugAction, application
PromanalCauses death of eggs and larvae. It is necessary to spray so that the whole plant is covered with the preparation so that it “drips from the plant”. Work the land thoroughly.
FitovermProvokes paralysis of pests, and they stop feeding. Death occurs on the third day after treatment. Full effect - after 6-7 days.
NemabaktThe nematode contained in the preparation is embedded in the larva and destroys it.
AvertinIt leads to paralysis by acting on the nerve endings of parasites.


InsectAppropriate use of drugs
ShieldIntestinal and systemic action.
False shieldIntestinal, systemic and contact action.

The lack of a durable shell in false shields does not prevent the penetration of contact poison.

NameA drugOperating principle
  • Arrivo.
  • Actellic.
  • Aktara.
They begin to act only after the pest enters the body.
  • Phosphamide.
  • Methylmercaptophos.
  • Bi 58.
The active substance enters the plant sap through the roots and leaves. Makes it poisonous to parasites.
  • Spruzit-AF.
  • Permethrin
Penetrates into the body of pests through the skin.

It is necessary to use biological and chemical agents strictly according to the instructions. After any treatment, the flowers should not be placed in direct sunlight, so as not to provoke the appearance of burns on the plant.

When using oil-based preparations, the solution is applied pointwise - only on the insect. If the agent is sprayed, then clogging of the pores on the leaves, oxygen starvation and, as a result, the death of the plant is possible.

Next, you can watch a useful video on how to deal with a scabbard on an orchid:

What won't get rid of?

  1. To combat scale insects and false insects, they do not use preparations containing regulators and growth stimulants, nitrogen. The use of funds will lead to the opposite effect - a strong reproduction of pests.
  2. If you remove insects with your hands, then you will only remove the shell, and the eggs and larvae will remain on the plant. As a result, the young growth will spread through the flower even faster.

Prevention of re-infection

Preventive actions for the reappearance of pests are as follows:

  1. cure the orchid from other diseases (if any);
  2. create favorable conditions for growth and flowering (the required level of lighting and humidity);
  3. if infected specimens are identified, immediately quarantine them and begin pest control;
  4. Keep "beginners" in pots separately from other flowers (2 - 4 weeks).

If an orchid has become infected with a scabbard or false shield, urgent measures must be taken. Otherwise, the flower may die, and not only shed the buds or leaves. Control methods depend on the personal preference of the owner and the degree of infection.

Watch the video: ORCHID CARE: HOW TO KILL SCALE, MEALY BUGS and APHIDS ON ORCHIDS 1080p (August 2022).