weevil? if oat, just throw it away. since it is soft.

if rice, u put under the sun for a few days. all weevil will run away/die, even the eggs will die if the sun is strong enough.

The eggs already inside the oat/beras before its even harvested.

U can keep it in the fridge confirm no kuku because all dieded, or u are just eating unhatched kuku.
Think about it, its actually good to have kuku because u know it means they dont use much pesticide.. If u buy those expensive ones less kuku but i believe its either they use alot pesticide or they already killed the kuku (perhaps UV light) before packing.

Those kuku are rather clean because they just eat the oat/beras mah...extra protein yo

you need to vacuum seal, else all hibernated eggs will hatch.... same as those dry corn or kacang kuda....put long time without all vacuum seal....this is what you be getting, same as rice too. rice for consumption, don't buy more than 2 [10kg] packs if you are cooking alone.