All insects and other pests need to breathe oxygen to survive. Here is a simple tip which can remove oxygen from a storage container. This is only useful if grain is stored in airtight containers such as clay jars or underground pits.
- When the container is full of dry grain, place a candle firmly into the grain. Make sure it has room to burn without setting fire to the grain. After lighting the candle, put the lid on the container and make it airtight.
- The candle will continue burning for just a few minutes until all the oxygen is used up. It will then go out. Without oxygen the pests will die before they can damage the grain.