There are many people willing to assist you with your weed control questions.
Many areas also have businesses specializing in weed control.
These individuals are very knowlegeable. If you have property in Montana contact the supervisor or Extension Agent in the county where your property exists. Many have e-mail addresses if you prefer. You may also wish to contact Dr. Sheley for technical questions about university research or for information from other universities. The weed control firms listed are members of the Montana Weed Control Association.