RHUBARB CURCULIO

RHUBARB CURCULIO

Lixus concavus
WEEVIL FAMILY (Curculionidae)

A large cylindrical beetle covered with pale scales that rub off easily. It ranges from 2/5 to 3/5 of an inch long and is one of the largest snout beetles in the U.S. This insect is light brown in color. Like all weevils they have elbowed antennae and a prolonged snout. At the tip of the snout (rostrum) are chewing mouthparts. Larva resembles plump maggots with a large head capsule that identifies them as beetles.

 

Larva bore in the stems of dock and sunflowers. Adults normally feed on these plants but they may eat and lay eggs on rhubarb. Their occurrence in Fontenelle Forest is not known.

 

This beetle belongs to the cylindrical weevil subfamily. Members of this subfamily are large in size for weevils.

 

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