Tired of spilling expensive insecticide on the ground when re-wetting your cattle rub? Darrel Hubl of Lawrence, Neb., designed a way to reduce waste and keep fly control rubs saturated with insecticide for weeks.

Mr. Hubl procured a 3-gallon bucket with a lid that could be mounted above the rub. At the base of the bucket, Mr. Hubl used epoxy glue to fasten a 1/2-inch barbed hose connector into the base of the bucket wall. He then connected a 1/2-inch tube to the connector and ran the tubing the length of the rub, plugging the end of the tube. Multiple pinholes poked on two sides of the tube-spaced periodically the length of the tube-allows the insecticide mixture to slowly recharge the rub for two to four weeks.