Repellents such as castor oil pellets and peppermint essential oil can be used to eliminate gophers. In some cases, it is necessary to use box traps to eliminate gophers that are causing damage to the property. Eliminating gophers may take several months, depending on the severity of the infestation.Continue Reading
Apply an even layer of castor oil pellets on lawns and gardens to repel the gophers, and replace the pellets regularly. To make a liquid castor oil repellent, mix a cup of castor oil with 3 tablespoons of liquid dish detergent in a gallon of water. Pour the mixture into any known tunnel entrances.
After placing a repellent in each tunnel, close the tunnels by shoveling dirt over the entrance. Placing a repellent with a potent scent, such as peppermint oil, on a cotton ball and placing the cotton into each tunnel entrance keeps the gophers away from the area.
If the gophers still come around, place box traps inside the tunnels. Typically, box traps are placed inside the tunnel by digging a hole then setting the trap inside the hole. Shovel dirt over the trap, and mark each trap with a flag. Check and reset the traps daily.