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Apple (Malus)
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Nepticulidae
1 Mine terminating in a blotch 2
  Mine forming a gallery throughout, though sometimes ending in a false blotch 4
2 Blotch small, generally in an angle of veins; larva yellow [6-7+10-11] Stigmella incognitella 78
  Blotch larger, generally on leaf margin 3
3 Blotch usually aborbing earlier gallery; frass black and linear; larva yellow feeding in June and July, exit hole on underside [6-7] Bohemannia pulverosella 40
  Gallery usually along leaf-margin; frass brown, dispersed; larva greenish white with dark head and ventral spots (mines venter upwards); feeding late August to early October; exit hole on upperside [8-10] Ectoedemia atricollis 29
4 Frass, except at beginning of mine, dispersed; larva green feeding in September and October [9-10] Stigmella oxyacanthella 100
  Frass linear throughout mine 5
5 Early mine more contorted; later gallery often with hairpin bends resulting in false blotches; larva green and often gregarious [8-10] Stigmella desperatella 105
  Early mine less contorted; gallery widening considerably, but seldom forming a false blotch larva yellow and not gregarious [6-7+9-10] Stigmella malella 97
Lyonetiidae
 Mine a brown circular blotch with the frass forming darker spiral markings in the centre. Egg laid well away from margin [8-9] Leucoptera malifoliella 260
 Mine a long sinuous gallery, often whitish in appearance and often crossing midrib. The egg is laid inside the leaf being injected through the epidermal layer. This feature helps to distinguish it from a Nepticulid mine where the egg is laid on the surface of the leaf. [5+7+9-10] Lyonetia clerkella 263
Bucculatricidae
Mine short contorted, linear black, close to a major vein. Later the larva eats out windows from upperside [7-8] Bucculatrix bechsteinella 275
Gracillariidae
1 Mine on upperside of leaf 2
  Mine on underside of leaf 3
2 Mine usually between veins, about 10mm diameter, without central diferently coloured patch; larva later feeds in folded leaf edge [7-8] Callisto denticulella 310
  Mine usually over a vein, about 20mm in diameter, with centrally differently coloured patch, larva mines throughout [7+9-10] Phyllonorycter corylifoliella 332
  Mine over mid-rib, silvery [7+10-4] Phyllonorycter leucographella 332a
3 Mine with lower epidermis silvery white [7-8] Callisto denticulella 310
  Mine with lower epidermis green or brown 4
4 Mine subrectangular, both upper and lower epidermis brown; larva feeds later in a tight pleat resembling a mine in centre of leaf or in a folded leaf-edge [7+8-9] Parornix scoticella 305
  Mine with lower epidermis usually with several folds [6-7+9-10] Phyllonorycter hostis 327
 
or
Phyllonorycter blancardella 326
  N.B. It is impossible to distinguish between the mines of P. cydoniella and P. blancardella.
The adults must be reared and preferably dissected to be certain of their identity.

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