Over the past 100 years, noxious weeds have been spreading at an alarming rate. For example, spotted knapweed arrived on the west coast in 1893 on the San Juan Islands Washington. By 1920, this weed had established itself in over 24 counties in three Northwestern states, with several large infestations near Missoula, Montana. Now, spotted knapweed is established in every county in the western United States and has invaded five million acres in Montana alone. (continued below weed photos) Click the photos below for particular weed information.
Montana Weed Control Assoc.		Idaho's Noxious Weeds

Large infestations continue to expand, especially along waterways and major transportation routes. Many other knapweeds, such as yellow starthistle, diffuse knapweed, Russian knapweed, and square rose knapweed have similar invasion rates throughout the western United States.

Leafy spurge and many other noxious weeds are invading from the east, rather than the west. In our opinion, if these weeds continue to spread at their current rate for the next 100 years, they will dominate most western rangelands.

The Montana Weed Control Association noxious weed information site includes a wealth of noxious weed information. One of the projects that MWCA is promoting is The Montana Weed Education and Awareness Campaign. The mission of the campaign is to inform all Montanans about noxious weeds and their impact on our enviroment.

The Montana Weed Control Association is dedicated to educating the landowners, recreationists, and visitors about why the control of noxious weeds is so important to the well-being of Montana. Its website's purpose is to provide the visitor with indentification information, the dangers of noxious weeds, and control recommendations. Montana Homes & Land hopes that you will visit the MWCA site and thanks them for this information. If you have additional questions, email MWCA at acamm@montana.edu with your questions. A weed control expert will provide information concerning your questions.