Excerpts from the report: This report presents results of field tests with two of the five materials tested in an exploratory manner and reported in Marketing Research Report 272. These reports are part of a broad program of research designed to reduce the cost of marketing farm products, including the cost of preventing insect infestation in stored grain. A study of the effectiveness of malathion emulsion sprays and methoxychlor dusts in protecting shelled corn from insect attack during an 8-month storage period in the Southeast was carried on from May 1957 to February 1958. Malathion emulsion sprays were applied at 5, 10, 15, and 20 parts per million (p.p.m. ) of technical premium grade malathion; and methoxychlor dusts were applied at 12.5, 25, 50, and 100 p.p.m. of technical methoxychlor. At the time of treatment, the corn averaged 13.76 percent of moisture, test weight was 56.95 pounds per bushel, and 16.9 percent of the kernels were damaged.