Three small plot efficacy studies were conducted to evaluate efficacy of selected currently registered and experimental insecticides against beet armyworm (BAW). The four experimental insecticides (Confirm, Pirate, Spinosad, Proclaim) generally provided increased efficacy as compared to federally registered insecticides. LD₅₀ determinations conducted on field collected colonies and a susceptible laboratory colony of BAW indicated reduced susceptibility of field populations to the commonly used registered insecticides. Considerable variation in the response of these colonies to the experimental insecticides was also noted, suggesting that insecticidal resistance may become a problem with these insecticides as well.