Insecta, Lepidoptera, Gracillariidae .
Description, Biology, Life Cycle, Damage, Common Names, Images
- Host plants: olive, as well as filarias (Phillyrea media and P. angustifolia).
- Mating may take place the day after emergence of the adults.
- Egg-laying follows shortly after coupling and continues for 10 to 15 days.
- The rate of larval development depends to a great extent upon climatic conditions. In the spring, the larva pupates 28 to 45 days after hatching, but only after several months in the case of the overwintering generation.
The neonate larva enters the leaf through the base of the chorion; it excavates a gallery towards the tip of the leaf, then turns and moves towards the petiole. Mining progressively spreads.
The caterpillar passes through 2 instars and through a prepupal phase prior to pupation.
- Pupation lasts 11 to 18 days. The pupa, supported on its cremaster, perforates the upper epidermis of the leaf with its head spur and remains partly attached until adult emergence.
3 generations each year, one overwintering in the larval stage.
The first adults appear at the beginning of spring; they are active from the end of March to the end of May. Moths of the summer generation fly from the end of June until early August; those of the autumn generation from the end of September to October.
Mining may occupy most of the lamina of infested leaves but damage only erarely causes economically important losses.
HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.