Pecan Gathering
Pecan Weevils and Damaged Nuts
Short answer: Pecan weevils can damage nuts before they fall, leaving small holes or poor filling. Inspect shells for holes, discard damaged nuts, and do not mix damaged nuts into a good batch. If damage is widespread, note it for next season and consider local advice for your trees.
The check that matters
Look for small round holes before you look at anything else, because weevil damage announces itself in the shell before it shows in the kernel. Holed or poorly filled nuts go out, not into the drying tray, and the damage level goes into the notebook for next year. Widespread damage is a season to record and, if it repeats, a season to discuss with local tree advice.
What is the checklist?
- ☐ Look for small round holes in the shell.
- ☐ Discard holed or poorly filled nuts.
- ☐ Record damage levels in your notebook for next year.
Small holes as the first warning
Begin by searching for neat round holes, since weevil injury shows first in the shell rather than in the kernel interior. A hole that is neat, round and clearly bored through the shell is a strong sign of weevil activity, while irregular cracks or bruising may have other causes. Learning that hole shape helps you sort quickly and confidently during gathering and husking.
Hold suspect nuts up to good light and feel for lightness or hollowness that would confirm poor filling inside. A holed nut that also feels light is almost certainly damaged, while a holed nut that feels heavy still deserves discard because the shell protection has been breached. Holes are warnings to act on, not puzzles to debate at the sorting table.
Discarding damaged nuts without mixing
Holed or poorly filled nuts go out, not into the drying tray, and they must not be mixed into a good batch in the hope that a few damaged nuts will go unnoticed. A damaged nut in a tray wastes drying space and can affect neighbours, while a damaged nut in storage can spread decay or insect activity to sound nuts. A separate discard container, emptied promptly, keeps damaged nuts from re-entering the harvest.
Crack a damaged nut occasionally to learn what the damage looks like inside, since that knowledge sharpens future sorting. A kernel that is shrivelled, discoloured or eaten away confirms the decision to discard, and it teaches your eye to recognise similar damage faster. Learning from damaged nuts is useful, storing them is not.
Recording damage for next season
Record damage levels in your notebook for next year, noting the tree, the date and the proportion of holed or poorly filled nuts. A season with a few holed nuts is a normal occurrence, while a season with widespread holes is a pattern worth tracking. Notes across seasons show whether damage is rising, falling or confined to one tree, and that pattern guides gathering choices far better than memory.
Compare trees using those notes, gathering first from trees with low damage and leaving heavily damaged trees for later or for wildlife. A tree that repeatedly shows heavy damage may still be worth visiting for learning, but it should not dominate your harvest time. Record keeping turns weevil damage from a disappointment into a planning tool.
Widespread damage and local advice
If damage is widespread, note it for next season and consider local advice for your trees, rather than guessing at treatments or remedies. Local extension services and experienced tree guides understand regional weevil patterns and can advise on monitoring, timing and tree care without speculation. General remedies copied from elsewhere may not fit your trees, your region or your gathering goals.
Widespread damage in one season does not necessarily predict the next, since weather and tree cycles affect weevil activity year to year. Record the season, gather what sound nuts remain, and return next season with fresh notes rather than assuming the tree is permanently poor. Patience and local advice together handle widespread damage better than hasty action.
Frequently asked questions
How can I tell weevil damage from other shell damage?
Weevil damage often appears as a small, neat round hole bored through the shell, while cracks tend to be irregular and bruising tends to show as dents or discolouration. A holed nut that feels light or hollow confirms poor filling inside. When the hole shape is unclear, discard the nut anyway, since shell protection has been lost.
Should holed pecans be cracked to check the kernel?
Cracking a holed nut for learning is useful, since it shows shrivelling or eaten kernel inside and sharpens future sorting, but holed nuts should not be dried or stored alongside sound nuts. Use cracked damaged nuts as a lesson, not as part of the harvest. Discard the damaged group promptly after inspection.
Does weevil damage in one year mean the tree will always be poor?
No, weevil activity varies year to year with weather and tree cycles, so one heavily damaged season does not predict the next. Record damage levels per tree and compare across seasons before judging a tree. A tree that is poor one year may produce sound nuts the next, while a tree with repeated heavy damage deserves lower priority.
What to do next
Sorting out damaged nuts protects stored good nuts.