Benzene hexachloride in the soil gave protection against Horistonotus uhleri, with yields on treated plots of 26-35 bushels/acre, as against an avg. of 2 bu./acre on untreated plots. Corn grown in the same plots the following yr., without further treatment, was free of wireworms throughout the season, with a yield of 21 bu./acre. 5 lbs. technical DDT/acre, and 5 lbs. technical toxaphone/acre, also gave promising results. Chlordane was also tested. All the materials used were highly effective in the control of the wireworm. Apparently neither the fertilizer, nor the insecticides, was affected by the presence of the other when they were mixed together before application. Plots treated by hand broadcasting the fall before planting showed the complete effectiveness of benzene hexachloride in dosages as low as 2 oz. of the gamma isomer per acre in protecting the corn of the following spring.