Moth Schildlaus (White fly)

WhiteflyCommonly called "white fly" for their appearance, they are 1-2 mm long winged plant lice that feed on plant juices. White flies lay their eggs on plant stalks. The eggs hatch from moving larvae that attach themselves to the leaf undersides of the plant, pupate in the third larval stage and finally hatch as a "white fly".


Contents: Combat moth sign lice

  • Species and harmful effects of moth shield louse
  • Fight moth sign lice
  • Wanted poster: Moth shield louse (White fly)

Species and harmful effects of moth shield louse

Mothschildläuse are unpleasant pests and are among the plant lice. The flying insects, however, are also, similar to leaf fleas, able to jump long distances, so they can quickly attack several garden plants. Particularly well known in our latitudes are the ash-white fly (Siphoninus phillyreae) and the greenhouse-white fly (Trialeurodes vaporariorum). Despite their names, these pests are not flies, but are among the moth sign lice.

The harmful effect The moth sign lice on vegetables and ornamental plants is enormous: In addition to a weakening of the plant can lead to crop failure and leaf loss. But not the sucking of the sap is the real problem in an infestation: moth sign lice but honeydew, which promotes fungal diseases and mold growth at high temperatures.

Fight moth sign lice

Moth sign lice are also called white fly.


Once an infestation has been detected indoors or outdoors, it is important to act quickly to protect the plants. Biological countermeasures in the garden and greenhouse are the natural predators of the white fly, such as parasitic wasps and assassin bugs, which are available as larvae commercially. Also very environmentally friendly and suitable for use in the living area yellow panels or attractant stickers that attract the moth sign lice and stick to unwanted pests.

If the pest becomes a nuisance and natural countermeasures have no effect, you can too spray with the active ingredient pyrethrum or with natural fatty acids that also harm other insects, including beneficial organisms.

Tip: Which sprays are approved for garden use can be found in the Plant Protection Products Database of the Federal Office for Consumer Protection and Food Safety.

Wanted poster: Moth shield louse (White fly)

Description: 1-2mm large, fly-like plant lice

Food Source: sap

symptoms: Either the white fly itself is found on the plant, its larvae on the undersides of the leaves or its eggs on the plant stems. The separate honeydew promotes fungal diseases.

Prevention / fighting: Natural predators such as robber bugs and parasitic wasps; Yellow panels; Sprays with pyrethrum or natural fatty acids

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