hickory nut worm

Asked September 25, 2017, 7:15 AM EDT

Every year I collect a few to many Hickory nuts for a winter treat. Often a few nuts remain in spring or they are ones I sorted as suspect. From these nuts a worm/maggot emerges which is 3/8 to 1/2 inch long. I have tried placing them in moist soil to see if I can get them to pupate but with no success. Can you tell me the identity of this critter? I have been curious for a long time. Thanks, Rich

Kalamazoo County Michigan

1 Response

Hi Rich

There are a number of weevil species that infest acorns, chestnuts and hickory nuts as well, collectively we refer to them simply as nut weevils. I would need to see the adult phase to have a chance at confirming the specific species.

The University of Kentucky has a nice write-up on some of the species we typically find in Michigan here https://entomology.ca.uky.edu/ef206 specifically the greater and lesser chestnut weevils.