back to HYPP Zoology home page


.

Insecta, Coleoptera, Curculionidae .

Olive weevil

Description, Biology, Life Cycle, Damage, Common Names, Images

[R]Biology
- Host plant: polyphagous pest, attacking olive, fruit trees and ornamental plants.
- Adults: the first new adults appear from the end of May, continuing to emerge for about another month. The weevil is nocturnal, attacking the leaves to feed and falling down to the soil when disturbed. After mating, oviposition takes place in the soil from October onwards and continues for about 3 months.
- Eggs: they are laid in the soil, hatching 2 weeks later.
- Larvae: they live in the soil passing through 10 instars until pupating.
- Pupae: They last about one month from April and May.

[R]Life Cycle
- This pest has only one generation per year. Overwintering takes place as larvae in the soil, where they attack the roots of many plants.

[R]Damage
- On olive, damage is visible on the leaves as small, characteristic semi-circular notches bitten out of the periphery of the lamina (*) .

[R] Images

1. Otiorhynchus cribricollis Gyllenhall (Drawing by F. Pétré (Balachowsky & Mesnil))
   Adult
2. Otiorrhynchus cribricollis Gyllenhall Typical damage on an olive leaf (INRA)
   
3. Otiorrhynchus cribricollis Gyllenhall Larva (a) and nymph (b) (in Arambourg (Entomologie oléďcole))
   
4. Otiorrhynchus cribricollis Gyllenhall Adult (Santini / University of Pise)