Branched broomrape is of growing concern to the California processing tomato industry, with integrated management strategies needed to reduce the impact of the current infestation and mitigate the spread of this highly regulated parasitic weed. Herbicide efficacy research was conducted in 2020 and 2021 in a field known to be highly infested with branched broomrape; however, no broomrape emerged during the 2021 study. Because the 2020 and 2021 field trials had different tomato cultivars, subsequent research was conducted to evaluate the effects of cultivar on broomrape emergence. In the same broomrape-infested field site, several commercial processing tomato cultivars and grafted combinations were evaluated from 2022 to 2024. In addition to field studies, greenhouse cultivar screening studies were conducted from 2022 to 2025, evaluating 25 cultivars for broomrape sensitivity. Results from the 2022 greenhouse screening indicated that all tested cultivars, including the cultivar planted at the infested site in 2021, were susceptible to parasitism after inoculation with preconditioned broomrape seed, but that there was only minor variation in temporal emergence. The results from 2023 greenhouse study supported the 2022 results, with all tomato cultivars parasitized and only minor differences in broomrape emergence. In the 2024 greenhouse study, there was no broomrape emergence in any of the tested cultivars, possibly due to hot conditions in the greenhouse. In the 2025 greenhouse study, there were no significant differences in days to broomrape emergence among the tomato cultivars. Field cultivar studies conducted in 2023 and 2024 showed no significant differences in broomrape emergence among conventional or grafted cultivar combinations ( P = 0.23, 0.74); results for the nongrafted cultivars were consistent with greenhouse studies. Taken together, these experiments suggest that there is negligible variation in broomrape resistance among the tested currently available commercial cultivars; there is now considerable effort in the public and private sectors toward breeding for resistance to broomrape targeting several pathways. In addition, with the advent of high-throughput grafting technology, there is potential for using novel genetics from rootstocks in commercially planted processing tomatoes.