Agromyza
dipsaci Hendel, 1927a. Zool. Anz. 69: 251
Agromyza dipsaci Hendel, 1927a; Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 36 (figs 99-100), 38, 116
Agromyza dipsaci Hendel, 1927a; Spencer, 1990. Host
specialization in the world Agromyzidae (Diptera) : 242, 243
(figs 913-4), 244.
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Leaf-miner: A
funnel-shaped blotch mine at margin of leaf (Spencer, 1972b: 36 (fig. 100), 38).
Forms a long mine, which rapidly broadens, at the leaf edge. The mine turns brown. (British
leafminers).
Blotch,
invariably beginning at the leaf margin, widening fast and strongly,
giving the mine a funnel-like shape. Primary and secondary feeding
lines very conspicuous. Frass in large grains. The larvae leaves
the mine before pupation; according to Spencer (1954)
the exit slit is in the lower epidermis (Bladmineerders van Europa). |
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Larva: The larvae of flies are leg-less maggots without a head capsule (see examples). They never have thoracic or abdominal legs. They do not have chewing mouthparts, although they do have a characteristic cephalo-pharyngeal skeleton (see examples), usually visible internally through the body wall.
Posterior spiracles witth about 40 bulbs (Groschke, 1957a; Hering, 1957a) (Bladmineerders van Europa).
Puparium: The puparia of flies are formed within the hardened last larval skin or puparium and as a result sheaths enclosing head appendages, wings and legs are not visible externally (see examples).
Hosts in Great Britain and Ireland:
Hosts
elsewhere:
Time
of year - mines: June-July.
Time
of year - adults: June. Only a single generation in summer.
Distribution
in Great Britain and Ireland: Uncommon in England including
Middlesex (Scratch Wood), Surrey (Chelsham) and Huntingdonshire
(Monk's Wood) (Spencer, 1972b:
38), Surrey (Godstone) (pers. observation) and North Somerset and West Gloucestershire
(NBN
Atlas). Distribution
elsewhere: Widespread in continental Europe including Belgium
(Bladmineerders van Europa), Austria, Czech Republic, French mainland, Germany,
Hungary and Slovakia (Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere:
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