Curculio nucum
Haselnussbohrer ( Curculio nucum )
The hazelnut weevil ( Curculio nucum ) is a beetle of the family of weevils ( Curculionidae ).
Features
The beetles have a body length of 6 to 8.5 millimeters. Your body is black, white and gray-brown scaly, with whitish scales are larger than the others and form spots. The elytra seam is provided with long, spreading hairs, which form a characteristic comb. The tag ( scutellum ) is beschuppt as wide as long and white. Laterally it has a bare rim. The antennae and legs are reddish brown, the latter are densely hairy whitish. The sensor approach is in the middle trunk. The Scourge limbs are longer hairs protruding. The legs ( femora ) of the front legs have a highly visible teeth. The proboscis is shorter in males, longer in females than the body. The species can be confused especially with the acorn drill ( Curculio glandium ), whose elytra seam but does not have a comb. His scourge limbs are longer than broad and loosely, hairy fine fitting.
Occurrence and habitat
The species is widespread from Europe to the Caucasus to Asia Minor and Syria, and North Africa. You lack in northern Fennoscandia; in England and Scotland, it occurs only locally. The species is common in Central Europe and occurs from the lowlands to the mountains to.
Way of life
The adults feed in early spring from young fruits of cherries, pears and related plants and feed on hazels later. There they eat leaves and drill to young nuts. This fall off by it. The females lay their eggs in the nuts that are bitten it. Usually only one egg per nut is stored, often it is even more. The larvae feed for about four weeks from the interior of the nut, the drops due to the infestation of the plant. The fully grown larvae leave the nut to overwinter in the soil and pupate there until the spring. The adults of the new generation hatch in summer and winter.