Successful feedlot applications of Ruelene for cattle grub control were made on steers and heifers of several breeds with short- to long-hair coats. Treatments were made, on arrival, in September and October at Imperial Valley feedlots, to animals brought in mostly from Arizona and Texas. Control was effective with Ruelene at 50 mg/kg applied by the pour-on method. No serious effects from using Ruelene on the cattle were observed, and the occasional instances of very temporary side-effects were not considered harmful.

Assistance with this project was received from Allied Farms, Blythe; L. Anderholt and Sons, Holtville; Anderson Brothers, Calexico; Holly Sugar Company, El Centro; Jack Ivey, Indio; Morton and Nowell, Blythe; Vail Company, Temecula; and Hal Williams and Sons, Riverside.