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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Isochnus foliorum (Müller, 1764) [Coleoptera : Curculionidae]


Curculio foliorum Müller, 1764.
Isochnus foliorum (Müller, 1764)
Curculio saliceti
Paykull, 1792
Tachyerges scutellatus
Stephens, 1831
.


Leaf-miner: As far as known, larvae, pupae and mine are identical to those of I sequensi (= I. populi) - almost round, brown to brownish black, upper surface, very opaque blotch, about 1 cm in diameter, without an initial corridor. Upper epidermis leathery in colour. Often several mines in a leaf. All frass as a tar-like film on the floor 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).

Larva solitary.

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

Pupation in the mine; pupa not in a cocoon.

Hosts in Great Britain & Ireland:

Salicaceae      
Salix     Pitkin & Plant

Hosts elsewhere:

Salicaceae      
Salix     Bladmineerders van Europa

Time of year - larvae: August - October (Hering, 1957).

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Widespread in Britain Ayrshire (VC74), Caernarvonshire (VC49), Cumberland (VC70), Denbighshire (VC50), Dumfriesshire (VC72), County Durham (VC66), East Norfolk (VC27), East Ross (VC106), Glamorganshire (VC41), Herefordshire (VC36), Mid-west Yorkshire (VC64), Monmouthshire (VC35), North Lincolnshire (VC54), Shropshire (VC40), South-west Yorkshire (VC63), Staffordshire (VC39), West Kent (VC16), West Norfolk (VC28) and West Suffolk (VC26) (NBN Gateway).

NBN Grid Map:

NBN Grid Map

Isochnus foliorum
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 Bulgaria, French mainland, Germany, Italian mainland, Norwegian mainland, Poland, Slovakia, Svalbard and Jan Mayen and Yugoslavia (Alonso-Zarazaga in Fauna Europaea).

NBN Interactive Grid Maps of known host species:

Host species unknown

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
Fauna Europaea
NBN Gateway
NHM UK Checklist

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