Arthropods Daily – Issue No. 239

This summary discusses the main points and key details about the weevil species Curculio nucum. The weevil is small, ranging from 6 to 8.5 mm, with a light brown body and a long snout. It is often confused with the gland weevil Curculio glandium, but they differ in certain morphological details. The weevil has a two-year life cycle, with adult beetles emerging in the spring and laying eggs in hazelnuts. The larvae hatch and feed inside the nuts before burrowing into the ground for overwintering. Control methods for infestation include spraying insecticides and using entomopathogenic nematodes or the fungus Beauveria bassiana. Shell thickness does not necessarily correlate with the level of weevil damage.