Abstract: An arthropod repellent device for attachment to the pinnal portion of the ear of an agricultural animal, such as a cow, horse, sheep, goat, swine or the like, including a band or belt of flexible plastic material of about 3/8 inch to 11/2 inches wide and of a thickness of about 3/16 inch to about 3/8 inch, the material having an arthropod repellent chemical incorporated therein, the length of the band or belt being sufficient to encompass the base of the pinnal portion of the ear of the animal, or mostly thereof, to which it is applied, and means of penetrating the pinna and the band or belt to retain such in position around the base of the animal's ear pinnal portion. In one embodiment, a separate attachment element is employed to retain the band into position and in another embodiment, an attachment element is integral with the band or belt.