Description, Biology, Life Cycle, Damage, Common Names, Images
- The adult develops on pine (Pinus spp.); the larvae feed on roots of wild plants common in sandy ground (e.g. Eryngium maritimum, Psamma arenaria), as well as the plants cultivated on these soils, particularly vine and pine seedlings.
- Adult: it flies 1 hour after sunset, devours the needles at nightfall and remains motionless during the day. It mates on the branches of pine.
The female deposits her eggs in the sandy soil neighbouring the trees. Average fecundity: 30 eggs.
- Egg: development lasts 1 month.
- Larva: it develops in the ground and gnaws roots. It overwinters in the ground.
- Pupa: in the ground, in a small cell; pupation lasts 1 month.
Triennial cycle: the larva overwinters 3 times in the ground then pupates in May of the third year; the adult appears from mid-June to mid-July, feeds then lays eggs.
The adults are harmless to the crop; the larvae attack the roots of vine and young pines.
HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.