Involves the introduction and establishment of selected natural enemies of a particular weed species. This may include insects, fungi, and diseases that attack the target weed while not affecting desirable species. Effective biocontrol depends on the use of several insects that attack different plant parts. Effective biocontrol should increase as insects become more available. The use of herbicides to control noxious weeds.
Chemical control is the most commonly used method of weed control.
If used properly and according to label directions, herbicides are a very effective means of control. Although chemicals can be expensive, they are still one of the most economic methods of control once weeds become established. One control method itself seldom provides complete control. The Yellowstone County Weed District provides a sound IPM approach, with detailed involvement in all methods of weed control. The Noxious Weed Management Plan, Biological Control Schedule and Herbicide Spreadsheet for Yellowstone County are available for download below.