Three primary essential oils are useful in beekeeping: lemongrass, spearmint and thyme. Other oils such as wintergreen, spearmint and tea tree oil are also used in some formulations. When selecting an essential oil, it is critical to source food grade oils. https://www.motherearthnews.com/homesteading-and-livestock/using-essential-oils-for-honeybees-zbcbz1403
The most common essential oils used in beekeeping are lemongrass, spearmint and thyme (thymol oil). Other oils such as wintergreen, eucalyptus (eucalyptol), peppermint, menthol, and tea tree oil are also used in some formulations and included here. https://surrybeekeepers.org/wp-content/uploads/2016/11/EssentialOilsInBeekeeping161113.pdf