Bull thistle is a biennial, which means it typically takes two growing seasons to complete its life cycle. This video will introduce you to the life cycle of Bull thistle, how to identify it, concerns associated with it, and how it reproduces and spreads. UI Extension Educator Ron Patterson outlines six management options including prevention, cultural control, mechanical control, chemical control, biological and organic control, and Integrated Pest Management.
Educational Video Series #020
The following links provide information on various control methods for Bull thistle. The PNW Handbook contains information about the herbicides that are approved in Idaho. The mention of a specific brand name does not imply endorsement of that product over another product with the same active ingredient(s).
References for herbicide control:
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