Juglans-nigra
Guides
Conotrachelus retentus
Black Walnut Curculio
Conotrachelus retentus, commonly known as the black walnut curculio, is a true weevil (Curculionidae) native to North America. The species is tightly associated with black walnut (Juglans nigra), with larvae developing inside developing nuts and adults feeding on foliage. Adults exhibit limited dispersal behavior and have been observed to rarely leave their natal tree. The species is considered a pest of walnut production due to damage to nuts and foliage.