Nut curculio Conotrachelus hicoriae (Schoof) ( Click on images below to view larger image) Adult nut curculio. Oviposition hole by nut curculio in immature pecan fruit. Oviposition holes by nut curculio in immature pecan fruit. Oviposition puncture in more mature fruit. Nut curculio larva in immature pecan nut.