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Leaf-mine:
Larva mines leaves. On Eupatorium the case is extended at
the anal end by adding silk and widened by cutting a ventral gusset.
On Inula the case is firstly extended by adding rings of
leaf-cuticle at the oral end, before reverting to the method used
when on Eupatorium. The full-grown case is 10mm long (British
leafminers).
Larva:
Details unknown.
Pupa:
Details unknown.
Hosts
in Britain:
Hosts
elsewhere:
Time
of year - mines: August to September, then May to June when
on Inula. July to August, then April to May when on Eupatorium
(British
leafminers).
Time
of year - adults: June to August (UKMoths).
Distribution
in Britain: Known
to occur in much of Britain including Devon (Branscombe) (UKMoths)
East Cornwall, Hereford, North Hants, Surrey, West Cornwall and
West Kent (NBN
Gateway distribution map - BRERC,
JNCC and NE).
Prior
to 1962 both C. follicularis
and
C. trochilella
were thought to be a single species, C. troglodytella. Consequently,
distribution is clouded by older records which are not attributed
to one or other of the two species.
Also
recorded in Republic of Ireland (UKMoths
and Karsholt & van Nieukerken in Fauna
Europaea).
Distribution
elsewhere: Widespread in Europe including Albania, Austria,
Belgium, Bulgaria, Croatia, Czech Republic, Danish mainland, Estonia,
Finland, French mainland, Germany, Greek mainland, Hungary, Italian
mainland, Latvia, North Aegean Is., Poland, Romania, Sicily, Slovakia,
Spanish mainland, Sweden, Switzerland and The Netherlands. Also
recorded in the Near East (Karsholt & van Nieukerken in Fauna
Europaea).
Parasitoids:
Unknown.
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