The armyworms, which are used to test the resistance of corn plants to pests, drink beer — Milwaukee’s Best — as their aphrodisiac of choice. It is chilled and poured into dishes on the bottom of their cages.
“When they drink beer, boy, do they mate and lay eggs,” Dr. Davis said. “And they don’t like light beer.”
—Guy Gugliotta, "To Raise Armyworms and Corn Borers, Study Insect Husbandry," NYT