Parathion, chlordan and gamma benzene hexachloride were tested as seed protectants. 50% active insecticide preparations were used, and each was applied at rats of 4 and 8 oz., respectively, per bushel of seed. Laboratory and field studies showed that both levels of parathion gave good wireworm control and also appeared to improve slightly both germination and seedling growth. Gamma BHC was second to parathion in effectiveness, but caused characteristic root injuries in laboratory tests. Chlordan gave no plant injuries but was not effective against wireworms.