Insecta, Lepidoptera, Coleophoridae .
Description, Biology, Life Cycle, Damage, Common Names, Images
- Host plants: apple, cherry, plum, blackthorne and hawthorn.
- Adult: the moth flies from June to July. The female lays a maximum of 200 eggs, singly or in clusters on the underside of leaves.
- Egg: Embryonic development lasts approximately two weeks.
- Larva: the caterpillars emerge at the end of summer. They start to feed immediately. At first, they mine the leaf and later, attack it from the edges for a few days. Before the leaves fall in autumn, the caterpillars construct a hibernaculum using a strip of the leaf epidermis and silk threads which they spin. The caterpillar hibernates in this case near the buds, on the fruit or in the fork of branches.
In spring the hibernaculum is enlarged and becomes cone-shaped. Gripping with its thoracic legs the larva moves by crawling and cuts a hole round itself in the leaf. In autumn, the caterpillar, still in its hibernaculum, reaches a branch or stem, attaches itself with a silken thread and hibernates.
The following spring it disposes of its old hibernaculum and constructs a larger one, straight in shape, in which it pupates in June, without further feeding.
- One generation every two years.
- The egg hatches approximately two weeks after laying in summer; the caterpillar feeds until autumn, then hibernates, feeding again the following spring. It hibernates once more before pupating in June, the moth emerges two weeks later.
The caterpillars excavate round or rectangular mines in leaves, without causing deformation (*) . In spring they devour part of the buds and the young leaves. If they emerge very late, buds are severely damaged and the crop may be reduced. autumn damage is insignificant. This insect pest rarely causes major damage.
Widespread in Central and Northern Europe, Russia and Asia Minor.
DE: Sackträgermotte, Sackträgerraupe, Futteralmotte ES: Coleófora de los frutales FR: Coléophore des arbres fruitiers IT: Bruco astuccio dei fruttiferi PT: Coleóforo GB: Fruit tree case moth
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