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Leucoptera malifoliella (Costa)
Leucoptera scitella (Zeller), Cemiostama malifoliella

Insecta, Lepidoptera, Lyonetiidae .

Ribbed apple leaf miner, Apple leaf miner, Pear leaf blister moth

Description, Biology, Life Cycle, Damage, Common Names, Images

- Adult: wingspan 6 to 7 mm, fore wings greyish-white, shiny with a brownish stripe on the proximal half, surrounded by coppery zones, black and white. Hind wings pale grey and fringed (*) .
- Larva: 4 mm long, yellowish to pale brown, head brown, very small, bevelled, sunk into the thorax.

- Host plants: apple, more rarely, pear, cherry, quince and birch (Betula).
- The moth oviposite on the underside of leaves.
- Egg: embryonic development may exceed one month.
- The caterpillar lives as a leaf miner; the concentric galleries, diameter 5 to 6 mm, form whitish then brown spots, in which owing to leaf transparency, the frass is visible, grouped in darker concentric circles (*) .
On completion of growth, the caterpillar leaves the gallery and spins a cocoon (*) on the surface of the leaf (1st generation) or in cracks in the bark on the underside of branches (2nd overwintering generation).
- Pupa: formed after 2 days, its development lasts 8 days for the summer generation.

[R]Life Cycle
- 2 generations per annum, sometimes a partial 3rd generation.
- The pupa overwinters, the moths emerging in April. Larval development is completed by June. The 2nd generation caterpillars cause the same damage, from mid-July to early September. The most precocious larvae pupate and produce a 3rd partial generation at the beginning of August.

- In the event of heavy infestation, the leaf surface is severely damaged by the presence of mines and photosynthesis is reduced (*) .

[R]Common Names
DE: Münzenminiermotte, Fleckenminiermotte, Pfennigminiermotte ES: Minadora de hojas FR: Cémiostome du pommier, Mineuse cerclée IT: Cemiostoma o Minatrice concentrica del melo PT: Cemiostoma da macieira GB: Apple leaf miner, Pear leaf blister moth, Ribbed apple leaf miner

[R] Images

  1. Leucoptera malifoliella (Costa) Moth on an apple leaf (Coutin R. / OPIE)
  2. Leucoptera malifoliella (Costa) Mines bored by larvae in an apple leaf (Coutin R. / OPIE)
  3. Leucoptera malifoliella (Costa) Damage on apple Spiral mines formed in the lamina, with concentric frass deposits clearly visible.
  4. Leucoptera malifoliella (Costa) Cocoons The larvae form their pupal cocoons in natural cavities such as the pistillary cavity. The fruit tree red spider mite (Panonychus ulmi) has laid its winter eggs on the cocoon silk.

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