Atrazine has been the most widely used herbicide in North Americanprocessing sweet corn for decades; however, increased restrictions in recentyears have reduced or eliminated atrazine use in certain production areas.The objective of this study was to identify the best stakeholder-derivedweed management alternatives to atrazine in processing sweet corn. In fieldtrials throughout the major production areas of processing sweet corn,including three states over 4 yr, 12 atrazine-free weed managementtreatments were compared to three standard atrazine-containing treatmentsand a weed-free check. Treatments varied with respect to herbicide mode ofaction, herbicide application timing, and interrow cultivation. Alltreatments included a PRE application of dimethenamid. No single weedspecies occurred across all sites; however, weeds observed in two or moresites included common lambsquarters, giant ragweed, morningglory species,velvetleaf, and wild-proso millet. Standard treatments containing bothatrazine and mesotrione POST provided the most efficacious weed controlamong treatments and resulted in crop yields comparable to the weed-freecheck, thus demonstrating the value of atrazine in sweet corn productionsystems. Timely interrow cultivation in atrazine-free treatments did notconsistently improve weed control. Only two atrazine-free treatmentsconsistently resulted in weed control and crop yield comparable to standardtreatments with atrazine POST: treatments with tembotrione POST either withor without interrow cultivation. Additional atrazine-free treatments withtopramezone applied POST worked well in Oregon where small-seeded weedspecies were prevalent. This work demonstrates that certain atrazine-freeweed management systems, based on input from the sweet corn growers andprocessors who would adopt this technology, are comparable in performance tostandard atrazine-containing weed management systems.