The simple drier shown below will heat grain to temperatures high enough to kill most pests, including weevils, beetles and other insect pests, together with their eggs.
- Place a sheet of black plastic on top of an insulating mattress of dried grass. Place a single layer of dry grain on top of this. Place a larger layer of clear plastic over the grains. Fold the clear plastic under the black plastic layer and use stones to hold it in place.
- Make sure grain is well dried before treating in this drier. Exposing the grain to at least two hours of strong sunshine in the middle of the day should be sufficient to kill most pests.