A bill to amend the United States Grain Standards Act for the purpose of prohibiting the adulteration of grain after its purchase from the original producer or after acceptances for such grain for storage or handling by a licensee.

Amends the United States Grain Standards Act to prohibit the knowing addition to any grain shipment, after its purchase from the original producer or after acceptance of such grain for storage and handling, of any foreign material or dust which would change the character or test weight of that grain from the test weight or character prevailing at the time of first purchase. Authorizes the fumigation of grain to preserve its quality and the blending of separate lots of grain of the same kind.