Beech Scale

Cryptococcus fagisuga

Beech Scale, Beech Bark Scale, Felted Beech, Felted Beech Coccus

Buchenwollschildlaus by User:Gerhard Elsner (CC-BY-SA-3.0)
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Cryptococcus fagisuga beech scale and waxy deposits on a beech trunk
Buchenwollschildlaus by User:Gerhard Elsner (CC-BY-SA-3.0)
1 of 3
Beech Scale are tiny sap-sucking bugs. Each individual is only 1mm big, forming dense colonies within the crevices of beech bark. These insects can produce a cotton-looking, waxy white secretion, which acts as a layer of protection. They can be distinguished from other scale species from the host plant they are found on. They don't produce honeydew, unlike some other scale insects.
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Traits

Produce a white waxy powder, that covers trees. This makes trees vulnerable to secondary infections.

Appearance

An individual scale is only 1mm big so hard to see. Their presence is most likely to be noticed from the white secretions they produce.

Symptoms

The scales themselves are not overly damaging to beech, although, heavy infestations are believed to make secondary infections more likely. The larvae are even smaller (0.1-1mm) and are yellow and sometimes mobile, in comparison to mature adults who are sessile. They often hide within the tree crevices. Eggs are oval, yellow, and very small!

Activity

Diurnal

Personality

Order

Hemiptera

Family

Eriococcidae

Metamorphosis

Complete

Distribution

Europe, Asia and North America.

Biological treatment

Unfortunately, due to the size of beech, it can be difficult to apply any treatment against these insects. Luckily, these scales can only survive on beech.

Attracts

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