In most cases, once moles are initially removed the product remains effective 30 to 75 days but may last longer. Clients should be advised to reapply when they notice mole activity and not worry about a particular time frame. Additionally, there are some areas in which Mole Med is not recommended. For example, areas that are watered or irrigated extensively on a regular basis such as golf courses, are not good candidates for Mole Med. A certain amount of water is necessary, but too much water will quickly leach the Mole Med out of the soil.
Individuals can also make their own castor oil repellent.
Official testing results will be published in the Eastern Wildlife Damage Control Workshop Proceedings that will be held November 5 to 8 in Jackson, Michigan. We'll make those results available to you when they are printed. This is the information I currently have. Hopefully, it will be helpful to you and your staff in fielding mole inquiries. Iowa State University , Ames, Iowa.