Tip - How to Make Mole Repellent | eHow

A digging mole aerates the soil and devours harmful pests, but it can also leave unsightly humps in the yard or uproot plants. Dangerous traps and poisonous chemicals are illegal in many areas, making repellents a better option for mole control. Harnessing the repellent properties of castor oil, a common ingredient in commercial mole repellents,...