The most common lemon pests and control

Breeding lemons in a pot culture is very exciting. During this time, new varieties have been obtained, a certain agricultural technique has been developed, lemon pests have been identified and measures to combat them have been developed. The most common insects that inhabit lemons are scale insects, aphids, nematodes, and scale insects.


  • How to deal with scale insects on lemons
  • What to do if aphids start on lemon
  • Other pests on lemon

How to deal with scale insects on lemons

Description of scabbards

Scabbards deservedly belong to the most dangerous pests of all indoor citrus fruits, including lemon. This is due to the fact that the adult insect is well fixed on the plant, leads an almost immobile lifestyle and the dense chitinous shield makes it almost invulnerable to insecticidal preparations.

Only at the very beginning of development, pests have a soft shield and move around the plant. In scutes, sexual dimorphism is expressed, males are smaller in size, their oral organs are reduced and the scutellum is most often underdeveloped. They have well-formed legs and wings. Males make up about 20% of the total population. After fertilization of females, males die.

Females can have an oval or round body size from 3 to 5 mm, of various colors:

  • black
  • green
  • brown
  • patterned
  • transparent

Adult females have no wings, antennae, eyes, or legs. But their piercing - sucking mouth organs are perfectly developed. The female lays eggs, from which larvae hatch. The larvae have two stages. At the first stage, the larvae can move, for which they were called vagrants. In the second stage, they become like adults. Important! On indoor lemons and other flowers, females can reproduce without males; from unfertilized females, only females are obtained.

If round or shapeless bulges or plaques become noticeable on the leaves and trunks, an outflow of clear sap appears, and the plant begins to lag behind in growth, there are no flowers and buds on it, then this is a cause for concern. It is worth trying to consider incomprehensible tubercles on the lemon, pick up such a bulge with tweezers, and if it was possible to tear off the insect, then the plant is affected by scabies.

Control and prevention measures

Single adults can be mechanically removed from the plant. A thin toothpick and / or a stiff toothbrush will do this. Before removal, a soap solution must be applied to the leaves and stems. A solution of laundry soap or dishwashing detergent is suitable for this.

After that, the plant is treated with drugs of choice three times with a week break:

  • "Admiral"
  • "Mospilan"
  • "Spark"
  • "Aktara"

The best prevention of scabbard infestation is:

  • purchase of new plants only from trusted producers
  • compliance with quarantine deadlines
  • avoiding placing purchased bouquets next to indoor plants
  • regular inspection of all potted plants indoors

What to do if aphids start on lemon

Aphids are a fairly common pest. Small insects with a body length of about 2 mm and with or without wings, when severely infested, are clearly visible on the plant, where they can form a large colony in a short time. Young leaves are especially for the pest to taste.

If they began to acquire a deformed shape, and the leaves and shoots look sticky from pest excrement, then you need to carefully examine the lemon.

Aphids, even with a green body color, are clearly visible, as they constantly move around the plant. You can fight aphids with folk remedies, for example, prepare a decoction from onion husks:

  • take 100 g of husk
  • pour five liters of hot water
  • insist 48 hours
  • spray the plant
  • repeat the treatment twice more every two days

Important! If lemon trees have fruits or ovaries, then insecticidal preparations should not be used. Processing them during this period can make lemons unfit for food. To treat the plant with insecticides, for example, "Aktara", should be done only as a last resort. Prevention against aphids is as follows:

  • systematic inspection of the lemon and regular showers, especially in summer;
  • compliance with quarantine rules

Other pests on lemon

Video on how to "cure" lemon:


Citrus nematodes are small worms that are almost transparent or whitish. Infection most often occurs through the soil. The pest gnaws at the roots and begins to actively feed on plant juices. If the lemon has begun to turn yellow with normal care. dry and fall off the leaves, then, perhaps, its root system is affected by a nematode.

If you remove the tree from the pot, then swelling and thickening can be distinguished on the roots. This is a sign of the presence of live nematodes. You can get rid of them as follows:

  • remove the lemon from the pot and rinse the roots with running water
  • put lemon roots in hot, + 45 degrees, water for half an hour
  • transplant the plant into a new sterile soil
  • spill it with the preparations "Bak Ekogel", "Nemagon"

Prevention against nematodes is to regularly wipe the leaves with soapy water and use soil after disinfection.


If white or grayish lumps similar to cotton wool began to appear on lemon trees, the plant itself began to grow worse, while the buds and flowers grow deformed, then this indicates a mealybug lesion. Citrus buds can also infect lemon roots. At the initial stage, it is enough to remove all plaque with a damp swab, and spray the plant with a solution of green soap.

It is enough to dilute 15 g of soap in one liter of water and process the plant twice at weekly intervals. If this does not help, then you can carry out the treatment with "Aktara" or another drug. Sometimes, in order to avoid pest infestation of the lemon, it is enough to be attentive to the plant and regularly take a hygienic shower for it.

Watch the video: 14 Nasty Citrus Diseases that You MUST Avoid (January 2022).