FAQ

It is safe to consume dead weevils.  There is a very small risk that live weevils may harbor foodborne illness bacteria if they were recently feeding on contaminated foods.

The FDA allows certain levels of insect parts in foods: http://vm.cfsan.fda.gov/%7Edms/dalbook.html.  They do this to avoid the alternative, which is to use huge amounts of pesticides which present hazards themselves.

If you have grains with live weevils they can be killed using dry ice and sealing the grains in a container.  Smaller containers can use oxygen absorber packages.