Pink rot, caused by the soil-borne fungus Phytophthora erythroseptica, is a significant disease affecting potatoes globally. While it primarily occurs in wet fields, it can also develop in sandy soils without excessive moisture. Factors that favor infection include highly infested soil, high temperatures at harvest, wounds and bruises during harvest, and high humidity in storage. If infected tubers are stored under high humidity with poor ventilation, significant losses of stored potatoes can result. Mefenoxam, a highly effective systemic fungicide, has been used for many years to manage oomycete pathogens in potatoes, including P. erythroseptica and Pythium ultimum. However, resistance to mefenoxam is increasingly common in P. erythroseptica in the United States. Fortunately, a new product, oxathiapiprolin, has recently been registered for use on potatoes to control oomycete diseases such as pink rot. To investigate optimal application timings of oxathiapiprolin for pink rot control, randomized complete block spray trials were conducted over five years. In addition to different application timings of oxathiapiprolin, various timings of mefenoxam were also studied to determine the most effective application schedules for pink rot control. The results showed that applying oxathiapiprolin in the furrow or foliarly when tubers reach a diameter of 2-3 cm provided effective control of pink rot during storage. These findings demonstrate the efficacy of new product chemistries in controlling pink rot.