Help us achieve our goals:
make a donation »
Join the RHS today and
support our charity
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Make a donation
Join the RHS today and support our charity
I have forgotten my password
Keep me signed in
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
See what events are on near you and browse your bookmarked pages.
Beech scale produces a dirty white waxy powder which can be obvious on beech trees. Although it is unsightly and may cause alarm it does little harm to the trees.
Beech scale, also known as felted beech coccus, is a scale insect that feeds on the sap of beech (Fagus sylvatica) trees. It is found in colonies in crevices of the bark of the trunk and larger branches.
Individuals are about 1mm long but infestations are usually detected by the dirty white waxy powder that colonies produce.
There is no honeydew produced and little direct damage caused but affected trees may become more susceptible to beech bark disease.
As this insect usually causes little direct damage to trees control is not necessary. This is fortunate as it is not practical to treat the large trees that it often infects.
Beech scale is parthenogenetic (reproducing without the need for males) scale insect with one generation year.
During the summer each female lays clusters of up to eight eggs under the protective white waxy wool like substance. The eggs hatch by late summer and the nymphs settle to feed in bark crevices. They overwinter as nymphs becoming adults in early spring.
Beech hedging Brown scale Cushion scale Diaspid scale Euonymus scale Fluted scale Hemispherical scaleHorse chestnut scale Hydrangea scale Juniper scale Mussel scale Oleander scaleScale insects Scurfy rose scale Soft scale Viburnum scaleWisteria scaleWoolly vine or currant scale Yew scale
the RHS today and get 12 months for the price of 9
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
Register for the site or sign in to share your experiences on this topic and seek advice from our community of gardeners.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.
Join the RHS today and get 12 months for the price of 9