Agriculture Reference
In-Depth Information
Fig. 285
Male summer fruit tortrix moth,
Adoxophyes orana
(x6).
DESCRIPTION
Adult female
18-22 mm wingspan;
forewings
greyish-brown, with inconspicuous, reticulated
markings;
hindwings
grey.
Adult male
15-
19 mm wingspan;
forewings
light greyish-brown,
with dark brown to ochreous markings;
hind-
wings
grey
(Fig. 285). Larva
up to 20 mm long;
body
yellowish-green to dark green;
pinacula
small and yellowish;
head and prothoracic plate
yellowish-brown.
Pupa
10-11mm long, dark
brown.
Fig. 283
Pupal cremasters: (a) strawberry tortrix
moth,
Acleris comariana;
(b) carnation tortrix moth,
Cacoecimorpha pronubana;
(c) straw-coloured
tortrix moth,
Clepsis spectrana;
(d) dark strawberry
tortrix moth,
Olethreutes lacunana.
Archips podana
(Scopoli)
Fruit tree tortrix moth
This is one of the most abundant tortricid species
to occur on fruit crops. The larvae damage the
buds, leaves and developing fruits of apple, pear,
plum, currant, raspberry and many other plants.
BIOLOGY
Adults are usually most abundant in July. They
deposit eggs in flat, green batches on the leaves
of various trees. The eggs hatch about 3 weeks
later and the larvae then feed beneath silken
webs often formed between leaves and adjacent
maturing fruits. Larvae eventually hibernate,
usually in their third instar; under favourable
conditions, however, some may complete their
development in the summer to produce a partial
second generation in the autumn. In early spring,
overwintered larvae, including those from any
second generation, again become active; they
Fig. 284
Garden rose tortrix moth,
Acleris variegana
(x6).
spun leaves, attacking the foliage and developing
fruits. Summer larvae pupate in August. Larvae
produced by second-generation adults over-
winter and pupate in late May or early June.
