The single best way to prevent a weevil infestation, says Harris, is to freeze new grains and rice for a few days after purchasing. This can interrupt the life cycle and kill any emerging weevils ...

While it has a cute snoot, a rice weevil is a stowaway. It sneaks into your pantry as an egg that its mom laid inside a single grain of rice. Once it hatches, it turns your rice into its new home.