Biology Reference
In-Depth Information
DESCRIPTION
Adult:
15-20 mm wingspan; fore wings creamy white,
marked with silvery grey, greyish yellow, olive-yellow
and brownish black; hind wings greyish.
Larva:
up to
18 mm long; reddish brown to blackish brown, with
inconspicuous, brown or reddish-brown pinacula; head,
prothoracic plate and anal plate black.
DESCRIPTION
Adult:
16-24 mm wingspan; fore wings pale yellowish
to yellowish brown, with light brown, chestnut-edged
markings; hind wings greyish brown; antennae of male
with a basal notch.
Egg:
flat and oval; laid in an oval,
raft-like batch.
Larva:
up to 20 mm long; whitish green,
but darker above, with light green pinacula; head light
green to brownish green; prothoracic plate light green or
yellowish green, with dark sides and hind edge; anal
plate green, dotted with black; anal comb yellowish,
with 6-8 teeth; first and hindmost spiracles elliptical
and distinctly larger than the others (unlike
Pandemis
heparana
and
P. corylana
).
Pupa:
8-13 mm long;
brown or blackish brown; cremaster longer than broad.
LIFE HISTORY
Adults occur mainly in June and July. The larvae feed
within spun leaves from April onwards, most becoming
fully grown by late May or early June. They then
pupate, either in a spun leaf or in the larval habitation,
and adults appear shortly afterwards. There is just one
generation annually. Adults and larvae of this species
are often mistaken for those of
Celypha lacunana
(p. 264).
LIFE HISTORY
Adults occur from June to August, eggs being deposited
on the leaves or branches of various trees and shrubs.
Some eggs hatch after a few weeks but others not until
the following spring. Young summer larvae feed on the
foliage for a short time and then, whilst still small, spin
silken retreats on the twigs in which they overwinter.
Activity recommences at bud-burst, when overwintered
eggs also hatch. Larvae feed in a rolled or folded leaf
until May or early June. They then pupate in whitish
cocoons, each spun in the larval habitation or in the
shelter of a folded leaf.
DAMAGE
The larvae cause slight foliage damage and
disfigurement but infestations are unimportant.
Pandemis cerasana
(Hübner) (
688-689
)
Barred fruit tree tortrix moth
An often common but minor pest of trees and shrubs in
gardens and nurseries close to woodlands. Hosts include
alder (
Alnus
), birch (
Betula
), crab-apple (
Malus
), elm
(
Ulmus
), flowering cherry (
Prunus
), hazel (
Corylus
),
lime (
Tilia
), oak (
Quercus
), rowan (
Sorbus aucuparia
),
sycamore (
Acer pseudoplatanus
) and willow (
Salix
).
Eurasiatic. Widely distributed in Europe.
DAMAGE
Leaf damage is usually unimportant as larvae rarely
feed together in large numbers.
688
689
688
Female barred fruit tree tortrix moth (
Pandemis
cerasana
).
689
Larva of barred fruit tree tortrix moth (
Pandemis
cerasana
).
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