Keeping bugs out of rice
Those bugs are probably weevils.  I would take it back to the store and ask for a refund.  If the rice is the only grain with bugs, chances are the larvae were already in the rice.

The weevils are about 1/4 inch long and they have a little tube sticking out of their head.  The larvae take about 35 days to emerge from inside the kernels.  A farmer can only control a weevil infestation with chemicals, which would preclude the organic label, and there is just so much frogs and birds can eat.