Agriculture Reference
In-Depth Information
Endothenia gentianaeana
(Hiibner)
webbed leaves. These habitations, within which
masses of frass accumulate, are formed both
on the fruiting canes and on the new growth.
Pupation takes place within the larval habitation
from May onwards and the adult emerges
about 3 weeks later. There is just one generation
annually.
This locally distributed moth is associated with
Dipsacus fullonum.
Infestations also occur on
cultivated teasel, the seed heads of which are
used in preparing (teasing) high-quality cloth
such as that used as billiard-table baize. Infested
seed heads are weakened and easily collapse,
making them unsuitable for commercial use.
DESCRIPTION
Adult
15-20 mm wingspan;
forewings
pale grey to
brownish-grey, with a white-bordered chocolate-
brown blotch on the hind margin;
hindwings
grey
(Fig. 293). Larva
up to 15 mm long;
body
dark
brown;
pinacula, head, prothoracic plate and anal
plate
black or brownish-black
(Fig. 294).
BIOLOGY
Adults occur in July and deposit eggs on teasel.
The larvae feed singly within the pith of the seed
heads during September and October, partly
filling the receptacles with masses of blackish
frass and whitish webbing. An emergence hole,
through which the adult moth will eventually
emerge, is bored through the wall of the seed
head. The fully fed larva then overwinters, still
within the seed head, and pupates in the late
spring.
Hedya dimidioalba
(Retzius)
Marbled orchard tortrix moth
This polyphagous species attacks various trees
and shrubs, especially
Crataegus
and other
DESCRIPTION
Adult
15-19 mm wingspan;
forewings
ochreous-
white, suffused with blackish-brown, especially
basally, and irregularly marked with black, white
and bluish-grey;
hindwings
dark grey with
creamish-white cilia.
Larva
12-15 mm long;
body
greyish-cream to whitish-grey;
pinacula
indistinct, greyish or brownish-grey:
head and
prothoracic plate
blackish-brown;
anal plate
pale
brown.
Pupa
9-12 mm long, reddish-brown
with paler wing pads.
WKF
WwM
mm'
'
Epiblema uddmanniana
(L.)
Bramble shoot moth
This species is an important pest of blackberry
and loganberry. The larvae, commonly known as
'bramble shoot webbers', destroy buds, and also
cause death and distortion of shoots. Canes of
heavily infested plants are weakened and crop
yields in the following year are reduced.
mm
Fig. 293
Male bramble shoot moth,
Epiblema
uddmanniana
(x6).
BIOLOGY
Small larvae overwinter in silken cocoons. In
spring, they attack the flower buds. Later, each
feeds on the shoots within a shelter of tightly
Fig. 294
Bramble shoot webber,
Epiblema
uddmanniana
(x5).
