Insecta, Lepidoptera, Stigmellidae .
Description, Biology, Life Cycle, Damage, Common Names, Images
- Host plant: apple.
- Egg: deposited on the underside of the leaves (*) .
- Larva: tiny, it lives inside the leaf lamina and forms elongated and sinuous gallery terminating in a broade blotch which can reach 3 to 4 mm (*) . The frass is deposited inside the gallery to form a thin black thread. The fully grown larva leaves the leaf, pupates in the ground and hibernates (*) .
- 3 generations, 4 in Mediterranean countries.
- The moths appear between mid-March and the end of May. The second flight occurs at intervals throughout June and the third from end of July to the beginning of September.
The damage is generally minor unless there is a massive infestation. In this case, the numerous galleries which travel through the leaf impede photosynthesis and cause its drying up (*) . The leaf turns brown and falls prematurely which endangers the harvest and the physiological balance of the tree (*) .
HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.