The leaf and stem mines of British flies and other insects

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds


Napomyza cichorii Spencer, 1966
[Diptera: Agromyzidae]

Chicory fly

Napomyza cichorii Spencer, 1966b. Proc. R. ent. Soc. Lond. (B) 35: 34
Napomyza cichorii Spencer, 1966b; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 259, 265, 266 (fig. 1000)
Napomyza cichorii Spencer, 1966b; Dempewolf, 2001. Larvalmorphologie und Phylogenie der Agromyzidae (Diptera) : 256.

Stem-borer: Normally a borer in stems or flowers. Oviposition generally in the base of the midrib. The larva tunnels deep in the tissues of leaves and stem. Pupation in stem or root (Spencer, 1973b) - see also Bladmineerders van Europa.

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.

The larva is described by de Meijere (1926, as lateralis).

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).

Comments: Described as a serious pest of cultivated chicory (Cichorium) in Belgium and The Netherlands (Spencer, 1966b).

Hosts in Great Britain and Ireland: Currently unknown.

Hosts elsewhere:

Cichorium       Spencer, 1966b
Cichorium endivia Endive   Bladmineerders van Europa
Cichorium intybus Chicory British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - larvae: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: England (Spencer, 1990: 265).

Distribution elsewhere: Belgium, Switzerland (Spencer, 1990: 265), The Netherlands (Spencer, 1966b; Bladmineerders van Europa), Estonia, Finland, French mainland, Germany, Hungary, Italian mainland, Lithuania, Spanish mainland, Switzerland and Ukraine (Fauna Europaea).

NBN Atlas links to known host species:

Cichorium endivia, Cichorium intybus

British and Irish Parasitoids in Britain and elsewhere:

Ichneumonoidea - Links to species no longer available  
Chorebus glaber (Nixon, 1944) Braconidae: Alysiinae
Chorebus parvungula (Thomson, 1895) Braconidae: Alysiinae
Chorebus senilis (Nees, 1812) Braconidae: Alysiinae
Dacnusa pubescens (Curtis, 1926) Braconidae: Alysiinae

External links: Search the internet:
Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Atlas
NHM UK Checklist
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