How to recognize black vine weevil 

Adult black vine weevils are 7-10 mm in size, are brown-black with pale yellow spots on the back and cannot fly. Larvae have a white body and a brown head. Larvae can be found in the soil during AprilMay and develop into pupae around AprilJune. The adult weevils can be found above ground from end May to early August. They are mostly nocturnal and hide during the day. They feed from the edge of leaves with characteristic small round bites. Adult black vine weevils deposit eggs back in the soil from July until September. Larvae will hatch from the eggs and will overwinter in the soil. In greenhouses, multiple generations occur. Places with minimum temperatures of 15° C are suitable for overwintering for black vine weevils.  

Otiorhynchus sulcatus Black vine weevil larva
Black vine weevil larva
Black vine weevil pupa Otiorhynchus sulcatus
Black vine weevil pupa

Black vine weevil damage 

Adult weevils cause feeding damage, which is mostly considered as cosmetic damage. It can be recognized as round bites from the leaf edges. Larvae feed from plant roots. When they emerge from the eggs, larvae will start feeding from the smallest roots. As they grow larger, larger roots, root tubers, rhizomes and even bark of woody stems are consumed. A plant with a damaged root system is weakened and extra vulnerable for secondary diseases, like for example fungi. With heavy infestations plants wither and die. 

Otiorhynchus sulcatus Black vine weevil
Black vine weevil adult
Damage by the black vine weevil
Damage by the black vine weevil

Black vine weevil life cycle

  • up to 600 eggs per female
  • development stages: egg, larva, pupa, beetle
  • parthenogenetic reproduction

Black vine weevil host plants

  • shrubs e.g. Azalea, Camelia, Fuchsia, Hedera, privet, Rhododendron and Taxus
  • pot plants
Our products against

Black vine weevil

ENTONEM

Effective against
– Fungus gnats
– Beetle larvae
– Thrips pupae

LARVANEM: Heterorhabditis bacteriophora for the biological control of beetle larvae

LARVANEM

Effective against
– Garden chafer
– Black vine weevil
– Cockchafer
– Armadillo weevil

Common beetle species

Black vine weevil
Armadillo weevil

Cockchafer
Garden chafer