Biology Reference
In-Depth Information
564
Scythropia crataegella
(Linnaeus) (
564-567
)
Hawthorn webber moth
A locally important pest of hawthorn (
Crataegus
); also
associated with
Cotoneaster
and
Prunus
. Widespread in
central and southern Europe; also found in the more
southerly parts of northern Europe.
DESCRIPTION
Adult:
13-14 mm wingspan; fore wings silvery white,
mottled with ochreous and brown.
Larva:
up to 15 mm
long; reddish brown, the thoracic segments marked
dorsally with yellowish orange; body hairs whitish and
relatively long; head black.
Pupa:
7-8 mm long; mainly
black, suffused with dirty creamy white dorsally.
564
Hawthorn webber moth (
Scythropia crataegella
).
LIFE HISTORY
Infestations are usually first noticed during the spring,
when the overwintered larvae feed gregariously on the
foliage of host plants, protected by a flimsy but
expansive web. Larvae are fully grown from mid-June
onwards. They then pupate within the web, and adults
emerge in late June and July. Eggs deposited during the
summer hatch in the late summer. The young larvae
then mine briefly within the leaves before hibernating,
the mined leaves remaining attached to host plants
throughout the winter.
565
DAMAGE
Larvae cause significant defoliation. Also, their webs
disfigure host plants, affecting the development of the
new shoots.
565
Larvae of hawthorn webber moth (
Scythropia
crataegella
).
567
566
566
Pupa of hawthorn webber moth (
Scythropia crataegella
).
567
Hawthorn webber moth (
Scythropia crataegella
) damage
on
Cotoneaster
.
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