How to Manage Pests
Pests in Gardens and Landscapes
Harvesting and storing walnuts
It is important to harvest at the earliest possible date to avoid worm damage to nuts while they
are still on the tree and to minimize damage from rains. Begin to knock the nuts out of the trees
as soon as the hulls begin to split and pick them up as soon after harvest as possible.
After harvest, the nuts should be hulled and prepared for storage. Once hulled, rinse the shells
with water to remove the surface tannins that may stain the shell. Spread the hulled nuts out to
complete the drying of the kernel inside. To determine if the kernels are dry enough for storing,
shell and try to break the kernel in half. If the kernel snaps cleanly rather than bending, the
nuts are ready. For best long-term storage, freeze hulled nuts for 48 hours and then seal in airtight
containers or plastic bags. This will kill any insect pests and their eggs and prevent loss during
storage. Nuts still in the shell may be stored for many months in a cool dry place. Shelled nuts
will keep for several months if refrigerated or frozen.
once the husks split