Excerpts from the report Summary: This report presents results of tests with various insecticidal dusts and sprays applied to stored grain for protection from insect attack. It summarizes the tests with lindane made in the period October 1952 through December 1956. Because of the interest in protective sprays and dusts for stored grain, results to date are published even though the studies are being continued. The studies were conducted on wheat and shelled corn in the standard circular 3,250-bushel metal bins of the Commodity Credit Corporation, U. S. Department of Agriculture. After the protective treatments were applied, the grain was sampled monthly to determine the insect population trends, moisture content of the grain, insecticidal residues, depletion of insecticide by bioassay tests, and commercial grade. In tests with wheat, the fate of the insecticides was traced through milling and baking tests.