Agriculture Reference
In-Depth Information
DESCRIPTION
Adult
12-15 mm wingspan;
forewings
whitish-
ochreous, marked with yellow-ochreous and
with a conspicuous, brownish median fascia;
hindwings
grey.
Larva
up to 11mm long;
body
reddish-brown or yellowish-brown to
olive-green;
pinacula
large, brown and moder-
ately conspicuous;
head and prothoracic plate
dark brown or black;
anal plate
brownish to
yellowish.
Family TORTRICIDAE
(tortrix moths)
Acleris comariana
(Lienig & Zeller)
Strawberry tortrix moth
Fig. 282
Strawberry tortrix moth,
Acleris comariana
(x6).
cremaster
broad and short, with short lateral
horns
(Fig. 283a).
This species is a locally common pest of straw-
berry, especially in fenland areas. The larvae,
when numerous, cause considerable defoliation.
They sometimes also attack the developing fruit,
causing malformation.
Acleris variegana
(Haworth)
Garden rose tortrix moth
BIOLOGY
Unlike other strawberry-infesting tortricids, this
species overwinters in the egg stage. The eggs
hatch in spring and the larvae feed in folded
leaves from April onwards, sometimes webbing
the foliage to adjacent blossoms. Fully fed larvae
pupate in June, and adults occur from mid-June
to July. Their eggs hatch in approximately 2
weeks, and the larvae feed rapidly to pupate by
the autumn. A second flight of adults occurs
from September to late October or early Novem-
ber; these moths deposit the winter eggs on the
leaves of strawberry plants.
Larvae of this polyphagous species feed on the
foliage of various fruit crops (Rosaceae); they
are also a pest of cultivated rose. Adults, that
have much of the basal part of the forewings
marked with white
(Fig. 284),
occur from July to
September. The mainly green to yellowish-green
larvae feed from May to early July.
Adoxophyes orana
(Fischer von Roslerstamm)
Summer fruit tortrix moth
This species is an important orchard pest in con-
tinental Europe. Locally important infestations
also occur on apple and pear in southeastern
England, especially in Kent. The larvae damage
the leaves but, more significantly, graze upon the
maturing fruits from which they remove large
areas of skin.
DESCRIPTION
Adult
13-18 mm wingspan;
forewings
extremely
variable, but often brown with a prominent
red or blackish costal blotch;
hindwings
grey
(Fig. 282). Egg
0.8 x 0.6mm, flat, pale yellow to
reddish.
Larva
up to 15 mm long;
body
green,
darker dorsally;
pinacula
brown;
head
yellowish-
brown;
prothoracic plate
yellowish-brown with
a dark hind margin;
anal plate
green.
Young
larva
whitish to brownish;
head
brown or
black.
Pupa
6.0-7.5 mm long, light brown;
BIOLOGY
Adults occur in June and again, usually in larger
numbers, in August and September. Eggs are
laid in yellow, scale-like batches on the leaves
and hatch about 10 days later. Larvae inhabit
