Since the past couple of years, I have been trying to get better about preventing food wastage. This means cooking just enough quantity (mostly succeed although there are still times it is really difficult!), using what is my kitchen cupboard before buying new ingredients and storing grains, pulses, seeds and flours carefully so that they are not destroyed by bugs, insects and other such pests.
There are plenty of natural preservatives for storing dry staples. Bay leaves and sun dried red chillies are good examples; add a few of these to your container of grains and they should keep the nasties at bay.
One of my uncles told me about Ayurvedic tablets called Parad which are commonly used in India to store grains and flours. For each kilo of your dry staple, add about 10 to 12 tablets and they take care of the rest.
I have been using Parad tablets since the last two years and they have really helped keep any bugs and insects away from my dry staple foods.
I use them in grains, pulses, seeds, dry fruits, flours, pastas, rice and even scatter them around the kitchen cupboards storing these foods. The best part is that the tablets are reusable and so go a long way.
Hope you found this useful. If you have any effective preservation methods for dry staple foods, you are invited to share them in the comment box below.