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Cameraria
ohridella Deschka & Dimic, 1986 Horse Chestnut Leaf-miner Cameraria ohridella Deschka & Dimic, 1986. |
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Leaf-miner: The larva mines the leaves causing noticeable brown blotches, often many to one leaf. There is however, a similar-looking fungus which can cause confusion (UKMoths). The mine begins at a flat, oval, somewhat iridescent egg shell at the upperside of the leaf. There starts an epidermal corridor of some mm, that abruptly widens into an upper-surface blotch. The blotch is elongate, often confined between by a pair of lateral veins; its colour is cinnamon, with a darker centre. The frass is not granular, like in Phyllonorycter species, but consists of a tarlike substance covering the floor of the mine. The number of mines can be as much as several tens per leaf. Pupation occurs within the mine (Bladmineerders van Europa). The leaf-mine is also illustrated in British leafminers and the Encyclopedia of Life. Watch the Naked Scientist video. Larva: The larvae of moths have a head capsule and chewing mouthparts with opposable mandibles (see video of a gracillarid larva feeding), six thoracic legs and abdominal legs (see examples). The larva is illustrated in Bladmineerders van Europa and the Encyclopedia of Life. Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples). The pupa and whitish silk cocoon are illustrated in Bladmineerders van Europa, British leafminers, UKMoths and the Encyclopedia of Life. Adult: The adult is illustrated in UKMoths and the Encyclopedia of Life. The species is included in mothdissection.co.uk. Comments: A review of The Horse-chestnut Leaf-miner and its parasitoids has recently been published by Pocock, Evans, Straw and Polaszek, 2011. Hosts in Great Britain and Ireland:
Hosts elsewhere:
Time of year - larvae: May - October (British leafminers). Time of year - adults: Multivolitine, with up to three generations a year (British leafminers). Distribution in Great Britain and Ireland: This species was discovered near Macedonia in 1985, and since then has spread rapidly to other countries in Europe. It was first discovered in Britain at Wimbledon in south-west London in 2002, but possibly had arrived the previous year, as it was quite plentiful. It is thought that the species may be expanding partially due to accidental transportation by man, either by road or rail (UKMoths). Widespread including Anglesey, Bedfordshire, Caernarvonshire, Cambridgeshire, Cumberland, Denbighshire, Derbyshire, Dorset, East Kent, East Norfolk, East Suffolk, East Sussex, Flintshire, Glamorgan, Leicestershire, Mid-west Yorkshire, North Essex, North Lincolnshire, North Somerset, North Wiltshire, North-east Yorkshire, Northamptonshire, Shropshire, South Devon, South Essex, South Lancashire, South Wiltshire, South-west Yorkshire, Stafford, Warwickshire, West Gloucestershire, West Lancashire, West Norfolk, West Suffolk, Westmorland and Worcestershire (NBN Atlas). Also recorded in the Channel Is. (Guernsey) (British leafminers). See also Forest Research for details of economic impact. Distribution elsewhere: Widespread in continental Europe including Albania, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Danish mainland, French mainland, Germany, Greek mainland, Hungary, Italian mainland, Liechtenstein, Luxembourg, Macedonia, Poland, Romania, Slovakia, Slovenia, Spanish mainland, Sweden, Switzerland, The Netherlands, Ukraine and Yugoslavia (Fauna Europaea). Also recorded in North America (Forest Research). NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: |
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| Last updated 13-Jul-2019 Brian Pitkin |  |
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