Every food item except sugar, powdered milk, salt, and honey needs to be fumigated. This will protect your food from becoming infested with weevils or spoilage. There are two methods to choose from:

1. Dry Ice: On bottom of a 5-gallon metal storage bucket place 1/4 pound dry ice under a non-conductive material, like draft paper, that can be left in the bucket. Pour grain or other food on top of the kraft paper. Fill the container and leave two inches headspace in each can. Press lid down gently leaving only a small outlet for escaping air. When dry ice has completely dissipated (about one hour) put lid on all the way and seal it (can seal with masking tape). Label container is a must, include date stored and use a grease pencil. Caution: Don't put dry ice directly on wheat. The wheat will be frozen and become useless as food.
2. Sulphur method: Sulphur comes in two sizes: large or small. It doesn't matter what size you use, except that the smaller pieces tend to emit more fumes than the larger pieces. Place the proper amount of sulfur in a cheesecloth, or clean nylon stocking and tie the sulphur into. Push the bag of sulphur as far down into the grain as possible. There is no need to wait; the lid may be placed on the can immediately and sealed and labeled.

   Size of can	Amount of sulphur
   Four or five gallon can	1 oz. (1 TB) sulphur
   Thirty-three gallon garbage can	6 oz. (6 TB) sulphur
   Fifty-five gallon can	12 oz. (12 TB) sulphur