Abstract Four insecticides were evaluated to determine their efficacy in controlling cereal leaf beetle larvae in winter oats. Insecticides were applied May 30 on ‘Windsor’ oats grown on the Eastern VA Research Station in Richmond County near Warsaw, VA. A randomized block experimental design was used with 3 replications. Individual plots were 4 rows 16 ft long and spaced 0.6 ft apart. Each spray concentrate was applied to the foliage with a CO2 powered back-pack sprayer at 32 psi that delivered 26.5 gal of finished formulation per acre. Individual treatments were evaluated 72 hr after treatment by comparing the number of larvae per 3 row ft in the treated plots to those in the untreated plots. All 4 insecticides provided satisfactory control. However, % mortality in the Furadan, Malathion, and Larvin plots was significantly higher (P = 0.05) than in the Toxaphene plots.