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

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Pseudorchestes pratensis (Germar, 1821)
[Coleoptera : Curculionidae]


Salius pratensis Germar, 1821
Orchestes tomentosus
Gyllenhal, 1835
Orchestes waltoni
Curtis, 1838
Rhynchaenus pratensis
(Germar, 1821)
Pseudorchestes pratensis
(Germar, 1821).


Leaf-miner: The larva makes a small full depth blotch, usually in the leaf tip. Frass concentrated in the centre of the mine (Bladmineerders van Europa).

Larva: The larvae of beetles have a head capsule and chewing mouthparts with opposable mandibles and lack abdominal legs (see examples).

The larva, when full grown, makes a globular cocoon in that same centre and pupates there (Bladmineerders van Europa).

Pseudorchestes pratensis
Larva of Pseudorchestes pratensis on Centaurea scabiosa
Image Chris Snyers (Bladmineerders van Europa)

 

Pupa: The pupae of beetles have visible head appendages, wings and legs which lie in sheaths (see examples).

Hosts in Great Britain & Ireland:

Asteraceae        
Centaurea nigra Common Knapweed British Wild Flowers by John Somerville et al. Pitkin & Plant

Hosts elsewhere:

Asteraceae        
Centaurea jacea Brown Knapweed   Bladmineerders van Europa
Centaurea scabiosa Greater Knapweed 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 & Ireland: Widespread in Britain including Bedfordshire (VC30), Berkshire (VC22), Cambridgeshire (VC29), Denbighshire (VC50), East Norfolk (VC27), East Suffolk (VC25), East Sussex (VC14), Glamorganshire (VC41), Hertfordshire (VC20), Huntingdonshire (VC31), Leicestershire (VC55), Northamptonshire (VC32), Oxfordshire (VC23), South Hampshire (VC11), Surrey (VC17), Warwickshire (VC38), West Kent (VC16), West Norfolk (VC28) and West Suffolk (VC26) (NBN Gateway).

Also recorded in the Republic of Ireland (Alonso-Zarazaga in Fauna Europaea).

NBN Grid Map:

NBN Grid Map

Pseudorchestes pratensis
NBN Grid Map : NBN Terms and Conditions

Maps are only displayed if the NBN server is active. N.B. Only publicly available records, if any, are shown by default

Distribution elsewhere: Widespread in continental Europe including Austria, Bulgaria, French mainland, Germany, Greek mainland, Hungary, Italian mainland, Moldova, Poland, Romania, Russia - East, Sicily, Slovakia, Switzerland, Ukraine and Yugoslavia. Also recorded in the Oriental region (Alonso-Zarazaga in Fauna Europaea).

NBN Interactive Grid Maps of known host species:

Centaurea jacea, Centaurea nigra, Centaurea scabiosa

British and Irish Parasitoids in Britain and elsewhere: Currently unknown.



External links: Search the internet:

Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life, as Salius pratensis
Fauna Europaea
NBN Gateway
NHM UK Checklist

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