Insecta, Coleoptera, Curculionidae .
Description, Biology, Life Cycle, Damage, Common Names, Images
- This weevil is restricted to chestnut and oak (Quercus).
- Adult: it appears at the beginning of autumn and feeds for a week; then, the female lays 1 or several eggs in the chestnuts or in the acorns.
Average fecundity: 40 eggs.
- Egg, larva: embryonic and larval development lasts 35 to 40 days. The larva then perforates the fruit (*) , devours it, and then buries itself in the ground at a depth of 7-8 mm. It builds an earthen cell in which it overwinters and eventually pupates (during the next summer) (*) .
- 1 generation per year.
- The diapausing larvae pupate at the end of June and the adults appear from mid-August to the end of September in the south of France.
The attacked fruits drop prematurely. Damage is very variable depending on the different chestnut varieties.
HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.