How do you get rid of yellow jackets in large bales of hay?

To get rid of yellow jackets in large bales of hay, first, wear protective clothing to avoid stings. Use a combination of traps specifically designed for yellow jackets, baiting them with sweet substances like sugar water or fruit. Additionally, consider applying insecticides labeled for yellow jackets directly to the nests, preferably during the evening when they are less active. If possible, relocating the bales away from known nests can also help reduce their presence.